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    Wyświetlanie 1-61 z 61
    Tytuł:
    Dynamic states equations of transport pipeline in deep-sea mining
    Autorzy:
    Sobota, Jerzy
    Jianxin, Xia
    Kirichenko, Evgeniy
    Powiązania:
    https://bibliotekanauki.pl/articles/2073867.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    górnictwo głębinowe
    rurociąg głębinowy
    rurociąg transportowy
    deep-sea mining
    vertical pipeline
    stability of deep-sea pipeline
    Opis:
    The transport pipeline of lifting the underwater minerals to the surface of the water onto the ship during the movement of the vessel takes in the water a curved deformed shape. Analysis of the state of stability of the pipeline showed that if the flow velocity of fluid in the pipeline exceeds a certain critical value Vkr, then its small random deviations from the equilibrium position may develop into deviations of large amplitude. The cause of instability is the presence of the centrifugal force of the moving fluid mass, which occurs in places of curvature of the axis of the pipeline and seeks to increase this curvature when the ends of the pipeline are fixed. When the critical flow velocity is reached, the internal force factors become unable to compensate for the action of centrifugal force, as a result of that a loss of stability occurs. Equations describing this dynamic state of the pipeline are presented in the article.
    Źródło:
    Archives of Mining Sciences; 2021, 66, 3; 385--392
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Underwater vehicles in the research work of Szczecin Universities : systems and applications
    Pojazdy podwodne w pracach naukowych Uniwersytetu Szczecińskiego : systemy i zastosowania
    Autorzy:
    Graczyk, Tadeusz
    Powiązania:
    https://bibliotekanauki.pl/articles/32728220.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
    Tematy:
    deep-sea technology
    remotely operated vehicle
    manned deep-sea vehicle
    technika głębinowa
    pojazd głębinowy
    załogowy pojazd głębinowy
    Opis:
    The article presents the scope of research and application work on unmanned remotely operated deep-sea vehicle systems carried out at the then Szczecin University of Technology (now the West Pomeranian University of Technology in Szczecin). The work culminated in the construction of said systems and subsequent pioneering underwater work using them, implemented in cooperation with maritime industry establishments.
    W artykule przedstawiono zakres prac badawczych i aplikacyjnych dotyczących systemów bezzałogowych zdalnie sterowanych pojazdów głębinowych prowadzonych na ówczesnej Politechnice Szczecińskiej (obecnie Zachodniopomorski Uniwersytet Technologiczny w Szczecinie). Zwieńczeniem prac była budowa takich systemów i pionierskie prace podwodne z ich zastosowaniem, prowadzone przy współudziale instytucji gospodarki morskiej.
    Źródło:
    Polish Hyperbaric Research; 2022, 1(78); 51-64
    1734-7009
    2084-0535
    Pojawia się w:
    Polish Hyperbaric Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zoidbergus, A New Genus of Apseudidae (Tanaidacea) with Remarks on Apseudes Siegi and Apseudes Vitjazi
    Autorzy:
    Jóźwiak, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2051178.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Icelandic waters
    Apseudomorpha
    Apseudes
    Zoidbergus
    deep−sea
    Źródło:
    Polish Polar Research; 2014, 2; 389-414
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    International Seabed Authority and Environmental Deep-Sea Stewardship – Principles Governing the Protection and Use of Seabed Resources
    Autorzy:
    Nyka, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/1954778.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Deep Sea Stewardship
    Deep Sea Mining
    International Seabed Authority
    Future Generations rights
    common heritage of mankind
    Nauki Humanistyczne i Społeczne
    Opis:
    Koncepcje nawiązujące do sprawiedliwości ekologicznej wydają się być głęboko zakorzenione w prawnych regulacjach działalności w Obszarze. Konwencja Narodów Zjednoczonych o prawie morza wielokrotnie podkreśla konieczność ochrony ekologicznego i ekonomicznego interesu obecnych i przyszłych pokoleń przy prowadzeniu działalności wydobywczej w obszarze dna morskiego. W świetle coraz bardziej rychłej perspektywy rozpoczęcia działalności wydobywczej w obszarze dna morskiego morza pełnego konieczną staje się refleksja nad stopniem przygotowania Międzynarodowej Organizacji Dna Morskiego do realizacji swoich funkcji w zakresie reprezentowania interesu ludzkości.
    The concept of intergenerational justice is deeply rooted into the regulation of activities in the Area. United Nations Convention on the Law of the Sea on many occasions stresses the need to protect the marine environment in the interest of both contemporary and future generations. One of the institutions with vast competences in this field is the International Seabed Authority. With a perspective on inevitable commercial exploration and exploitation of seabed resourcesthere is a need to answer the question if the Seabed Authority is properly prepared both in the field of law and policy to act as a steward of a mankind?Which instruments has been developed to ensure sustainable use of seabed resources and which of them are at the disposal of the International Seabed Authority? Finally, are the standards of the protection of seabed environment sufficient to satisfy the needs of contemporary consumption without diminishing the ability of the mankind in the future to freely choose their path of development? We can assume that environmental standards which would protect the interest of future people would also secure the sustainability in contemporary use of common heritage at the Seas. International Seabed Authority and international law of the sea can play important role in this process by shaping the future of the mankind with actions undertaken today.
    Źródło:
    Prawo Morskie; 2020, XXXIX; 9-20
    0860-7338
    Pojawia się w:
    Prawo Morskie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of sea angling tourism
    Roawój morskiej turystyki wędkarskiej
    Autorzy:
    Jazewicz, I.
    Rydz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/85063.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Pomorska w Słupsku
    Tematy:
    development
    sea angling
    tourism
    maritime tourism
    fishing tourism
    deep sea fishing
    Opis:
    Maritime tourism should be understood not only as a system of fixed, maritime links and attractive cruises but also as individual yacht cruises, and many other forms of spending time on the water or under the water. A special type of tourism is maritime tourism, which includes features such as recreational fishing in the sea. Sport and recreational fishing became popular in Poland in the 90’s of last century. According to the data of harbor masters that keep records of fishing vessels out in the sea, the first effective service providers were the skippers from Łeba and Darłowo. The following study presents the development of specialized tourism in Poland which is fishing tourism with particular emphasis on Darłowo. Rules for organizing fishing trips, and the conditions that must be met in order to start this kind of business were discussed. Another important issues in the article include preparations of individual units for realizing tourist function, presenting additional services provided by the organizers of fishing cruises. On the basis of the survey research, the characteristic of fishing service users has been prepared, taking into account: motives and forms of arrivals, territorial origin of tourists, accommodation and length of stay.
    W niniejszym opracowaniu przedstawiono rozwój morskiej turystyki wędkarskiej w strefie Środkowego Wybrzeża na przykładzie portu w Darłowie. Zaznaczyć należy, że morska turystyka wędkarska staje się aktywną formą wypoczynku, zyskując coraz większe zainteresowanie nie tylko wśród wędkarzy, ale także pośród osób bez wcześniejszego kontaktu z wędkowaniem. W artykule na podstawie bezpośrednich badań terenowych prowadzonych w Darłowie przedstawiono zasady organizacji rejsów wędkarskich oraz wskazano na dodatkowe usługi świadczone podczas pobytu. Szczegółowo omówiono ponadto elementy składowe popytu turystycznego na rejsy wędkarskie. Uwzględniono więc liczbę korzystających z rejsów wędkarskich, dokonano ich charakterystyki społeczno-demograficznej, wskazano na motywy przyjazdów i obszary, z których pochodzili. Podkreślić należy, że rozwój wędkarstwa morskiego w Polsce uległ ożywieniu w drugiej połowie lat dziewięćdziesiątych. Świadczyć może o tym rosnąca liczba wędkujących i wypraw wędkarskich. Jak wynika z prowadzonych badań, Darłowo obok Łeby i Władysławowa staje się ważnym ośrodkiem rozwoju morskiej turystyki wędkarskiej. W Darłowie duży udział w organizacji i rozwoju bazy infrastrukturalnej dla wędkarstwa morskiego miała Darłowska Lokalna Grupa Rybacka. Jest to stowarzyszenie, które wspiera rozwój obszarów rybackich oraz łagodzi skutki zmian strukturalnych w sektorze rybołówstwa m.in. poprzez wsparcie finansowe zakupu nowych kutrów czy jachtów lub ich przystosowanie na potrzeby wędkarstwa morskiego. Interesujące pozostają wyniki badań ankietowych, które pozwoliły stworzyć wizerunek korzystających z morskiej turystyki wędkarskiej w Darłowie. Głównym motywem przyjazdu była chęć wypoczynku i relaksu (45,0% ogółu ankietowanych) oraz atrakcyjna oferta wędkarska (28,0%), o której wędkujący dowiedzieli się z witryn internetowych. Na rejsy wędkarskie dominująca grupa ankietowanych przyjechała własnym samochodem, na pobyt trwający od 1 do 6 dni. Korzystali oni głównie z bazy noclegowej oferowanej przez organizatorów rejsów (20,0%), z miejsc noclegowych na kwaterach prywatnych (23,0%) i w ośrodkach wczasowych (25,0%). Uczestnicy rejsów wędkarskich pochodzili z miast regionu środkowopomorskiego oraz z całego kraju, przede wszystkim z województw: dolnośląskiego, mazowieckiego, śląskiego i wielkopolskiego. Wyniki przeprowadzonych badań jednoznacznie wskazują, że morska turystyka wędkarska staje się perspektywicznym stymulatorem rozwoju turystyki i czynnikiem aktywizacji społeczno-gospodarczej miast i gmin nadmorskich w Polsce.
    Źródło:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2013, 17
    1643-0115
    Pojawia się w:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geodynamic setting of Scotia Sea and its effects on geomorphology of South Sandwich Trench, Southern Ocean
    Autorzy:
    Lemenkova, Polina
    Powiązania:
    https://bibliotekanauki.pl/articles/2041769.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    South Atlantic Ocean
    Scotia Sea Plate
    deep-sea trench
    GMT
    geology
    cartography
    Źródło:
    Polish Polar Research; 2021, 42, 1; 1-23
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geochemistry of surface sediments from the northwestern Gulf of Mexico : implications for provenance and heavy metal contamination
    Autorzy:
    Armstrong-Altrin, John S.
    Botello, Alfonso V.
    Villanueva, Susana F.
    Soto, Luis A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058576.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Tamaulipas
    deep-sea sediments
    enrichment factor
    contamination
    principle component analysis
    Opis:
    Thirty-five near-surface sediment samples were recovered from the continental shelf and upper slope regions of the north-western (NW) Gulf of Mexico. The geochemical data of the sediments recovered were examined to investigate the weathering intensity, provenance, palaeo-oxygenation condition, and level of heavy metal contamination. The sediments analysed showed a moderate to high intensity of chemical weathering. Major and trace element concentrations indicated a terrigenous origin, closely related to the weathering of rocks rich in aluminosilicates. The results of this study further revealed that major rivers, the Bravo and Soto La Marina, played an important role in delivering sediments to the study area. The concentration of transition trace elements such as Cr, Cu, Ni, and V revealed that the sediments were derived from intermediate rocks such as andesite. The V/Cr, Ni/Co, and Cu/Zn ratios in the sediments were <2, <5, and <1, respectively, suggesting a depositional process occurred under well-oxygenated conditions. Principle Component Analysis (PCA) did not show a significant difference in sediment texture between the continental shelf and slope areas. The enrichment factor (EF) and Geo-accumulation index (lgeo) values were <2 and <1, respectively, suggesting the absence of an anthropogenic input.
    Źródło:
    Geological Quarterly; 2019, 63, 3; 522--538
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Holocene climate dynamics in Sumba Strait, Indonesia: a preliminary evidence from high resolution geochemical records and planktonic foraminifera
    Autorzy:
    Putra, Purna Sulastya
    Nugroho, Septriono Hari
    Powiązania:
    https://bibliotekanauki.pl/articles/2024720.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    climate dynamics
    planktonic foraminifera
    Holocene deep-sea sediment
    Sumba Strait
    Opis:
    The dynamics of climatic conditions during the Holocene in the Sumba Strait is not well known, compared with in the Indian Ocean. The aim of this paper is to identify the possible Holocene climate dynamics in Sumba Strait, eastern Indonesia by using deep-sea core sediments. A 243 cm core was taken aboard RV Baruna Jaya VIII during the Ekspedisi Widya Nusantara 2016 cruise. The core was analyzed for elemental, carbonate and organic matter content, and abundance of foraminifera. Based on geochemical and foraminifera data, we were able to identify at least six climatic changes during the Holocene in the Sumba Strait. By using the elemental ratio of terrigenous input parameter, we infer to interpret that the precipitation in the Sumba Strait during the Early Holocene was relatively higher compared with the Mid to Late Holocene.
    Źródło:
    Studia Quaternaria; 2020, 37; 91-99
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thyasirid bivalves from Cretaceous and Paleogene cold seeps
    Autorzy:
    HRYNIEWICZ, KRZYSZTOF
    AMANO, KAZUTAKA
    JENKINS, ROBERT G.
    KIEL, STEFFEN
    Powiązania:
    https://bibliotekanauki.pl/articles/945983.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    bivalvia
    thyasiridae
    cold seeps
    deep sea
    ecology
    evolution
    cretaceous
    paleogene
    Opis:
    We present a systematic study of thyasirid bivalves from Cretaceous to Oligocene seep carbonates worldwide. Eleven species of thyasirid bivalves are identified belonging to three genera: Conchocele, Maorithyas, and Thyasira. Two species are new: Maorithyas humptulipsensis sp. nov. from middle Eocene seep carbonates in the Humptulips Formation, Washington State, USA, and Conchocele kiritachiensis sp. nov. from the late Eocene seep deposit at Kiritachi, Hokkaido, Japan. Two new combinations are provided: Conchocele townsendi (White, 1890) from Maastrichtian strata of the James Ross Basin, Antarctica, and Maorithyas folgeri (Wagner and Schilling, 1923) from Oligocene rocks from California, USA. Three species are left in open nomenclature. We show that thyasirids have Mesozoic origins and appear at seeps before appearing in “normal” marine environments. These data are interpreted as a record of seep origination of thyasirids, and their subsequent dispersal to non-seep environments. We discuss the age of origination of thyasirids in the context of the origin of the modern deep sea fauna and conclude that thyasirids could have deep sea origins. This hypothesis is supported by the observed lack of influence of the Cretaceous and Paleogene Oceanic Anoxic Events on the main evolutionary lineages of the thyasirids, as seen in several other members of the deep sea fauna.
    Źródło:
    Acta Palaeontologica Polonica; 2017, 62, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the relationship between wave breaking and marine aerosol concentration in deep sea areas
    Autorzy:
    Massel, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/241034.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
    Tematy:
    wave breaking
    marine aerosol concentration
    deep-sea areas
    aerosol fluxes
    Opis:
    Aerosol fluxes from the sea surface are one of the important factors determining the dynamics of the air-sea interaction. Not numerous available data showed that the intensity of aerosol fluxes strongly depends on the intensity of wave breaking. In the paper theoretical formulas to determine the probability of breaking crests and percentage of whitecaps coverage are discussed. These formulas are a starting basis for the set-by-step procedure to determine the aerosol fluxes in deep water under the steady sea state conditions.
    Źródło:
    Archives of Hydro-Engineering and Environmental Mechanics; 2001, 48, 2; 31-45
    1231-3726
    Pojawia się w:
    Archives of Hydro-Engineering and Environmental Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical foundations of the implementation of controlled pyrotechnical reactions as an energy source for transportation from the sea bed
    Autorzy:
    Filipek, W.
    Broda, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/134942.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    deep sea mining
    transport from the sea floor
    blasting materials
    pyrotechnics
    implementation
    exploitation
    Opis:
    The depletion of inland deposits of natural resources and the increasing demand for some raw materials have resulted in the growing interest in deep sea exploitation of natural deposits. This gives an impulse to the mounting research and development of methods of exploitation of natural deposits from the sea and ocean floors, which are not limited to petrol and gas. The main area of difficulty in opencast mining methods conducted at considerable depths is the transportation process from the sea floor to the surface. The methods employed so far, such as continuous line bucket (CLB), hydraulic pumping (HP) and air-lift pumping (ALP), have both advantages and disadvantages. The most salient problem is their considerable energy consumption resulting in great costs, hence the need for the development of less expensive methods. The authors have suggested a new method, involving the use of pyrotechnical materials as a source of energy in the transportation from the sea floor and have presented its theoretical grounding. Special emphasis has been placed on determining the depth to which the method can be applied and the energy needed in transportation in relation to the density of the transported substance (output).
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 48 (120); 117-124
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sequences of the lithofacies and depositional intervals in the Godula Beds of the Polish Outer Carpathians
    Sekwencje litofacji i interwałów depozycyjnych w warstwach godulskich Karpat
    Autorzy:
    Słomka, T.
    Słomka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/191192.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Carpathian flysch
    Markov chains
    sedimentary sequences
    deep-sea fans
    depositional lobes
    Opis:
    The Markov chains procedure was applied to the study on the sequences of lithofacies and depositional intervals in the Godula Beds (Turonian-Lower Senonian) of the Flysch Carpathians. The model (depositional) and modal (a most frequent in profile) diagrams were constructed and corresponding sequences were recognized. It was found that deposition from high-density turbidity currents of variable retardation rates was the dominating mechanism whereas the low-density turbidity currents were rather rare. The newly deposited sediments were commonly eroded by the succeeding, dense currents. Deposition processes were dominated by the two clearly separated environments: channels and depositional lobes. Their systems were subjected to frequent changes due to lateral migration caused by tectonic movements (uplift of cordilleras and subsidence of sea floor) and eustatic changes of sea level.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2001, 71, No 1; 35-42
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigations of mechanical properties of API P110 steel casing tubes operated in deep-sea sour condensate well conditions
    Autorzy:
    Yao, Zilin
    Wang, Yu
    Yang, Xuefeng
    Gao, Anping
    Zhang, Rong
    Jia, Yanjie
    Powiązania:
    https://bibliotekanauki.pl/articles/1585020.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    deep-sea drilling environment
    mechanical properties
    yield strength
    tensile strength
    corrosion modeling
    Opis:
    Due to the complexity of the marine environment, in deep-sea drilling, all kinds of strings are corroded by different deepsea conditions for a long time, accompanied by high temperature and high pressure, which lead to the continuous change of mechanical properties of materials. In order to solve the problem that the material mechanical parameters cannot be accurately described in the performance analysis of the casing, deep-sea simulated corrosion and material damage experiments of P110 material were carried out in this paper. Mass loss and tensile experiments on corrosion-damaged test pieces were conducted under different corrosion experimental periods. The changes in mechanical properties of the material were analyzed. Equations of the variation of the equivalent yield strength and the equivalent tensile strength were obtained. The results show that the equivalent yield strength and the equivalent tensile strength decrease with the increase of the weight loss rate. Based on the experimental results and finite element analysis, a method for establishing the material corrosion model was proposed in this paper. The deep-sea drilling corrosion performance model of P110 material was established, which greatly reduced the error caused by the material uniformity assumption in finite element analysis. This paper provides a theoretical basis for the analysis of reliability and life of P110 materials in wells.
    Źródło:
    Polish Maritime Research; 2020, 3; 121-129
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental verification of the concept of the use of controlled pyrotechnic reaction as a source of energy as a part of the transport system from the seabed
    Autorzy:
    Filipek, W.
    Broda, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/135689.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    deep sea mining
    transport from the sea floor
    blasting materials
    pyrotechnics
    experimental verification
    source of Energy
    Opis:
    In this article the authors discuss the concept of using pyrotechnical materials for transportation in deep sea environment. The use of pyrotechnical materials in underwater transportation involves their use as a source of energy (needed, for instance, in emptying the ballast tank). The authors presented the experimental verification of the usefulness of pyrotechnical materials in transporting from great depth. In the experiments, a modified composition black powder was used as source of energy. In the research the authors focused on two methods of controlling the pyrotechnical reaction effects, i.e., mechanical suppression of the blast, so as to reduce its negative effect on the housing of the transporter, and control of the pyrotechnical reaction itself. The obtained results confirm the possibility of using pyrotechnical materials in transportation of deposits from considerable depth.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 49 (121); 77-83
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Description of Paramoeba atlantica n. sp. (Amoebozoa, Dactylopodida) – a Marine Amoeba from the Eastern Atlantic, with Emendation of the Dactylopodid Families
    Autorzy:
    Kudryavtsev, Alexander
    Pawlowski, Jan
    Hausmann, Klaus
    Powiązania:
    https://bibliotekanauki.pl/articles/763698.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Amoebozoa, Dactylopodida, deep-sea protists, Paramoeba atlantica n. sp., phylogeny, SSU rDNA, taxonomy, ultrastructure
    Opis:
    A strain of marine amoeba has been isolated and studied from the bottom sediments of the Great Meteor Seamount (Atlantic Ocean, 29°36.29′N; 28°59.12′W; 267.4 m deep). This amoeba has a typical dactylopodiid morphotype, a coat of delicate, boat-shaped scales, and a Perkinsela-like organism (PLO), an obligatory, deeply-specialized kinetoplastid symbiont near the nucleus. These characters allow us to include this species into the genus Paramoeba. However, it differs from its only described species, P. eilhardi, in the structure of scales. P. atlantica n. sp. is established therefore to accommodate the studied strain. SSU rRNA gene sequence analysis suggests that P. atlantica belongs to the Dactylopodida, and is sister to a monophyletic clade of P. eilhardi and all Neoparamoeba spp., branching separately from P. eilhardi. Therefore, the genera Paramoeba and Neoparamoeba, currently defined based on the cell surface ultrastructure, might be paraphyletic and probably should be synonymized, as further evidence is accumulated. Based on the data available we emend the families Vexilliferidae and Paramoebidae to make them more consistent with the current phylogenetic schemes.
    Źródło:
    Acta Protozoologica; 2011, 50, 3
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The oldest representative of a modern deep-sea ophiacanthid brittle-star clade from Jurassic shallow-water coral reef sediments
    Autorzy:
    Thuy, B.
    Schulz, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/23392.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Echinodermata
    Ophiuroidea
    Ophiacanthidae
    coral reef
    deep sea group
    Late Jurassic
    Mergelstetten Formation
    Germany
    sediment
    Opis:
    Ophiurites crinitus is a fossil brittle−star species which passed largely unnoticed since its original description. In this paper, we redescribe the type material of O. crinitus with the aim to put it into the context of modern ophiuroid systematics, and propose the new genus name Ophiosternle to replace the invalid Ophiurites. The re−assessed species is shown to be a member of the extant deep−sea family Ophiacanthidae, articulated fossils of which are extremely rare. It presents greatest affinities with members of the Ophioplinthaca–Ophiocamax–Ophiomitra clade, of which it most probably represents the oldest known fossil species. The depositional environment of the strata, which yielded the described specimens is interpreted as shallow, storm−influenced marine setting in the immediate vicinity of coral reefs. This contrasts with the distribution pattern of extant species of the Ophioplinthaca–Ophiocamax–Ophiomitra clade, which almost exclusively occur at depths exceeding the shelf break.
    Źródło:
    Acta Palaeontologica Polonica; 2013, 58, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical and morphological characterization of polymetallic (Mn-Fe) nodules from the Clarion-Clipperton Zone in the Pacific Ocean
    Autorzy:
    Kozłowska-Roman, Agata
    Mikulski, Stanisław
    Powiązania:
    https://bibliotekanauki.pl/articles/2058694.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    polymetallic nodules
    critical elements
    rare earth elements
    deep-sea mining
    Clarion-Clipperton Fracture Zone
    Pacific
    Opis:
    Geochemical studies (WD-XRF, ICP-MS, and GF-AAS) have shown that polymetallic nodules from the eastern Clarion-Clipperton Zone (CCZ) in the Pacific Ocean are enriched in several metals such as Cu (mean 1.16%), Ni (1.15%), Co (0.15%), and Zn (0.14%), as well as remarkable contents of Mo (0.059%), V (0.04%), Ce (0.019%), Nd (0.011%), Li (0.015), and Pt (43 ppb). The average content of REE, together with Y and Sc, is 620 ppm. In nodules from the CCZ metal concentrations are often much higher than those reported in nodules from other ocean basins in the world. The bulk-nodule mean value of the Mn/Fe ratio is 5.3, which is characteristic for a mixed (hydrogenetic and diagenetic) origin of the nodules. Microprobe investigation revealed two different chemical compositions of the layers, and ascertained their general metal content. The nodules analyzed are composed mainly of concentric-collomorphic laminae of Mn and Fe (oxy)hydroxides which crystallized around mineral nuclei (e.g., quartz, clay minerals), bioclasts or rock fragments. They are from 3.3 to 7.6 cm in diameter. The chemical and physical properties of the laminae allowed distinction of two genetic types: hydrogenetic and diagenetic. Those formed as a result of hydrogenesis had increased values of Co, Si, Cl and S, while formed diagenetically showed increased levels of Cu, Ni, Mg, Zn and K. These lamina types are characterized by different growth structures, reflectivity, density and Mn/Fe ratios. The ratio of the diagenetic layers to hydrogenetic layers (192/53) in representative polymetallic nodules shows that the nodules of this study are of mixed hydrogenetic-diagenetic type. A mixed genesis was also shown by discriminant diagrams, with these CCZ samples being located at the transition between typical hydrogenetic and diagenetic fields.
    Źródło:
    Geological Quarterly; 2021, 65, 4; 177--194
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Conversion of Waste Jarosite Precipitates to Hematite
    Badania nad konwersją wytrąceń jarosytu w hematyt
    Autorzy:
    Vu, H. N.
    Dvorak, P.
    Sita, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/319187.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    aqueous conversion
    deep-sea nodules
    jarosite
    iron oxides
    konwersja wodna
    guzki głębinowe
    jarosyt
    tlenki żelaza
    Opis:
    Sodium and ammonium jarosite precipitates from the sulfuric acid leaching of deep-sea nodules were converted into well crystallized hematite by alkali decomposition of jarosite using sodium hydroxide or ammonia solutions at different temperature and subsequent sintering at 400 and 750°C. The obtained sodium and ammonium jarosite precipitates were intergrown aggregates composed of half-prism and tabular-like crystals with sharp corners and edges. It was found that base-strength of alkali solutions effected the kinetics of conversion reactions and morphology of solid phase. The residual solids retained the shape and the particle size of the original jarosite precipitates. The main feature of the residual from sodium jarosite is a severe surface pitting and an erosion of edges and corners. The decomposition of ammonium jarosite precipitates at different temperatures took place very fast and completed within 15 minutes at 25°C. Increasing temperature increased the decomposition rate. At 60°C jarosite decomposition was completed in less than 2 minutes. But the experimental results indicated that the sulfate anions slowly diffused from the jarosite structure after the completion of the decomposition reaction. The main impurities in jarosite precipitates such as Mn, Cu and Ni reported into the final product but hematite obtained from decomposition of ammonium jarosite contained significantly less Cu due to formation of copper ammonia complex. The XRD analysis results indicated that the decomposition products at temperatures lower than 90°C are amorphous. At 90°C the decomposition products consisted of poorly crystallized hematite. After sintering the decomposition products from both sodium and ammonium jarosites at 400°C and 750°C, well-crystallized hematite was obtained.
    Sodowy i amonowy jarosyt wytrąca się podczas ługowania kwasem solnym guzków głębinowych i zostaje przetworzony w wyraźnie skrystal-izowany hematyt za pomocą dekompozycji alkalicznej jarosytu, która zachodzi przy użyciu wodorotlenku sodu lub roztworów amonowych w różnych temperaturach oraz następujących potem procesów spiekania w 400 i 750°C. Uzyskane wytrącenia sodowego i amonowego jarosytu utworzyły następnie skupienia złożone z pół-pryzmatycznych i tabularycznych kryształów o ostrych końcach i krawędziach. Stwierdzono, że siła roztworów alkalicznych wpływa na kinetykę reakcji konwersji oraz morfologię fazy stałej. Pozostałe części stałe utrzymały kształt i wielkość ziaren oryginalnego wytrącenia jarosytu. Główną cechą reszt z sodowego jarosytu są wżery powierzchniowe oraz erozja krawędzi i końców. Dekompozycja wytrąceń jarosytu amonowego zachodzi bardzo szybko w innej temperaturze. Zajmuje to nie więcej jak 15 minut w temperaturze 25°C. Wzrost temperatury powoduje wzrost stopnia dekompozycji. W temperaturze 60°C dekompozycja jarosytu została ukończona w czasie mniejszym niż 2 minuty. Jednakże, wyniki eksperymentu wskazały, że aniony siarczanowe ulegają powolnej dyfuzji ze struktury jarosytu po ukończeniu reakcji rozkładu. Głównymi zanieczyszczeniami w wytrąceniach jarosytu są takie pierwiastki jak Mn, Cu oraz Ni, których obecność stwierdzono w finalnym produkcie. Jednak hematyt otrzymany w wyniku dekompozycji jarosytu amonowego zawierał znacznie mniej Cu ze względu na utworzenie kompleksu amonowego miedzi. Wyniki analizy XRD wykazały, że produkty rozkładu w temperaturze niższej niż 90°C są amorficzne. W temperaturze 90°C produkty rozkładu zawierały słabo skrystalizowany hematyt. Po spiekaniu produktów rozkładu z zarówno sodowego, jak i amonowego jarosytu w temperaturach 400°C oraz 750°C otrzymano dobrze skrystalizowany hematyt.
    Źródło:
    Inżynieria Mineralna; 2014, R. 15, nr 2, 2; 275-280
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Trace Metal Concentrations in Three Seafood Deep-Sea Fished Caught in the Moroccan Atlantic
    Autorzy:
    Akhouchal, Ihya
    Ait Alla, Aicha
    Hajji, Sara
    Agnaou, Mustapha
    Moukrim, Abdellatif
    Powiązania:
    https://bibliotekanauki.pl/articles/1955583.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    cephalopod
    shrimp
    fish
    metallic trace element
    deep sea fishing
    food safety
    validation of control measure
    Opis:
    The investigation within the framework of this study was carried out on three marine species fished off in Moroccan coasts, namely: a fish, the sole (Solea Vulgaris), a cephalopod, the cuttlefish (Sepia Officinalis) and a crustacean, the pink shrimp (Parapenaeus Longirostris). The aims of this study were assessing the level of concentration in these three marine species, of three metallic trace elements: lead (Pb), cadmium (Cd) and mercury (Hg) and giving a reflection on the way in which Moroccan deep-sea fishing professionals can join a food safety management system to ensure the safety of their product and promote their competitiveness. Sampling was carried out at the port of Agadir city after landing of the deep-sea fishing boats which operate beyond 10 nautical miles, offshoring the seabed of Agadir for pink shrimp (Parapenaeus Longirostris), and in Dakhla city offshore for sole (Solea Vulgaris) and cuttlefish (Sepia Officinalis). Trace metal analysis was performed on individual muscles belonging to the three species. The results of the conducted investigations show that the Pb content varies between 0.01 ppm and 0.27 ppm in Solea Vulgaris; between 0.015 ppm and 0.16 ppm in Sepia Officinalis and between 0.022 ppm and 0.38 ppm for Parapenaeus Longirostris. For Cd, the concentrations vary between 0.0047 ppm and 0.050 ppm in Solea Vulgaris; between 0.0025 ppm and 0.254 ppm in Sepia Officinalis and between 0.0065 ppm and 0.11 ppm in Parapenaeus Longirostris. Concerning Hg, the contents vary between 0.0006 ppm and 0.075 ppm in Solea Vulgaris; between 0.0008 ppm and 0.05 ppm in Sepia Officinalis and between 0.0016 ppm and 0.09 ppm in Parapenaeus Longirostris. It appears from this study that the metal contents detected at the level of the three species of seafood investigated are below the regulatory thresholds. These results can be considered as the first basis for validating the control measure linked to the absence of metallic contamination of the three species in the sites studied.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 9; 87-98
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Contrasting styles of siliciclastic flysch sedimentation in the Upper Cretaceous of the Silesian Unit, Outer Western Carpathians : sedimentology and genetic implications
    Autorzy:
    Strzeboński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2134836.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Carpathian flysch
    debrites
    deep-sea deposits
    depositional system
    gravitational resedimentation
    Silesian Basin
    tractionites
    turbidites
    Late Cretaceous
    Opis:
    This study reports on a new set of sedimentological data and related interpretations of the Santonian–Campanian siliciclastic deposits in the Western Flysch Carpathians based on natural outcrops in the uppermost Godula Formation and lowermost Istebna Formation. The rationale was to confront the characteristics of this flysch succession with current controversies and state of knowledge on deep-water clastic sedimentation. The sedimentological analysis of the field data allowed for multi-scale synthetic classifications of the depositional components in the investigated flysch. The hierarchical and practical nature of the suggested classification schemes allows for their application to similar deposits in other regions. The siliciclastic deposits are products of gravity-driven terrigenous sediment redeposition via submarine slumps, debris flows, and turbidity currents. Sediment reworking by tractional bottom currents is considered as an accompanying factor. Point-sourced turbiditic fan lobe fringes from the submarine piedmont ramp and linearly supplied debritic covers along the slope apron are proposed as dominant. The innovative linking between the textural-structural descriptive features of the deposits and the critical determinants of specific sediment gravity-flow processes and architectural elements of the deepwater clastic depositional systems is a significant contribution to this research field.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2022, 92, 2; 159--180
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New molluscs associated with biogenic substrates in Cenozoic deep-water sediments of Washington State
    Autorzy:
    Kiel, S
    Goedert, J.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/21866.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    deep sea
    Eocene
    deep water sediment
    sediment
    Cenozoic
    new bivalve species
    Gastropoda
    Bivalvia
    mollusc
    Washington State
    biogenic substrate
    Oligocene
    paleontology
    Opis:
    Cenozoic deep−water sediments of the Lincoln Creek, Makah, and Pysht formations in western Washington State, USA, contain sunken driftwood and whale bones that were colonized by invertebrates which largely depend on this type of transient habitat. These fossil woodand whale−fall faunules yielded six new mollusk species that appear to have been endemic to these biogenic microhabitats, except for one species which also occurs in cold−seep limestones. The new gastropod species are the neomphalid Leptogyra squiresi, the buccinid Colus sekiuensis, the allogastropod Xylodiscula okutanii, and the new bivalve species are the protobranch “Nuculana” posterolaevia, the mytilid Idas? olympicus, and the heterodont Thyasira xylodia.
    Źródło:
    Acta Palaeontologica Polonica; 2007, 52, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eco-biostratigraphic advances in late Quaternary geochronology and palaeoclimate : the marginal Gulf of Mexico analogue
    Autorzy:
    Antonarakou, Assimina
    Kontakiotis, George
    Karageorgis, Aristomenis P.
    Besiou, Eva
    Zarkogiannis, Stergios
    Drinia, Hara
    Mortyn, Graham P.
    Tripsanas, Efthymis
    Powiązania:
    https://bibliotekanauki.pl/articles/2058605.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    integrated stratigraphy
    Late Glacial-Holocene transition
    planktonic foraminiferal eco-bioevents
    deep-sea sedimentary correlations
    climate variability
    palaeoceanography
    Opis:
    This study combines high-resolution planktonic foraminiferal eco-biostratigraphy and palaeoclimatic data from the high-sedimentation-rate core J PC-26 from the northwestern margin of the Gulf of Mexico (GoM). The eco-biozones recognized (GOMPFE1-12) being correlated with published Mg/Ca-based sea surface temperatures. This updated palaeoclimatic and stratigraphic reference record facilitates correlations with the Greenland ice core events and their climatic relationships, and also provides a solid stratigraphic framework for correlations with other palaeoclimatic and palaeoceanographic records in the circum-GOM/Caribbean region. This multidisciplinary approach underlines the utility of supporting conventional dating methodologies with different constraints, and further reveals a powerful tool for reliably correlating marine records between comparable deep-sea marginal settings and coeval sequences of this region.
    Źródło:
    Geological Quarterly; 2019, 63, 1; 178--191
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Environment protection policy and monitoring systems for polymetallic nodules exploitation
    Autorzy:
    Abramowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/27315953.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    górnictwo głębinowe
    ochrona środowiska i monitoring
    konkrecje polimetaliczne
    deep sea mining
    protection of environment and monitoring
    polymetallic nodules
    Opis:
    The paper presents the analysis of ongoing implementation of environmental protection policies into deep seabed mining projects of Clarion-Clipperton Fracture Zone, (CCZ). Short introduction to the current environmental regime in the Area under UNCLOS jurisdiction is presented and potential impact of deep seabed mining is discussed. Selected results of efforts to minimize the impact on the marine environment and environmental baseline studies are described.
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 523-529
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unusual echinoid resting trace records change in the position of the redox boundary (Palaeogene of the Lesser Caucasus in Georgia)
    Autorzy:
    Uchman, Alfred
    Lebanidze, Zurab
    Kobakhidze, Nino
    Beridze, Tamar
    Makadze, Davit
    Lobzhanidze, Koba
    Khutsishvili, Sophio
    Chagelishvili, Rusudan
    Koiava, Kakha
    Khundadze, Nino
    Powiązania:
    https://bibliotekanauki.pl/articles/2172617.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ichnotaxonomy
    new ichnotaxa
    Irregular echinoids
    deep-sea
    flysch
    Redox boundary
    oxygenation
    ichnotaksonomia
    jeżowce
    muł abisalny
    flisz
    redoks
    natlenianie
    Opis:
    The first recognition of a tracemaker responding to a temporary shift in the redox boundary is recognized. This is recorded by a new trace fossil, Sursumichnus orbicularis igen. et isp. nov., which is established for mound-like structures on the upper surfaces of sandstone beds from the Borjomi Flysch (upper Paleocene–lower Eocene) in the Lesser Caucasus (Georgia). It is connected with the spatangoid echinoid burrow Scolicia de Quatrefages, 1849 and interpreted as a resting trace of the same tracemaker produced after moving up from a deeper position within the sediment. The resting is caused by an episode of unfavourable conditions related to shallowing of the redox boundary. The trace fossil is a component of the Nereites ichnofacies.
    Źródło:
    Acta Geologica Polonica; 2022, 72, 3; 317--330
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zarządzanie załogą na statku – badania jakościowe wśród marynarzy
    Managing Ship Crews: Qualitative Research among Seamen
    Autorzy:
    Kołodziej, Arkadiusz
    Kołodziej-Durnaś, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/599155.pdf
    Data publikacji:
    2012-12-15
    Wydawca:
    Instytut Pracy i Spraw Socjalnych
    Tematy:
    socjologia morska
    zarządzanie różnorodnością
    zarządzanie zasobami ludzkimi
    załoga statku dalekomorskiego
    maritime sociology
    diversity management
    human resource management
    deep–sea vessel crew
    Opis:
    artykule podejmowany jest problem zmieniających się warunków pracy na morzu. Autorzy dokonują rekapitulacji głównych aspektów środowiska pracy na statku dalekomorskim, wykorzystując analizy przeprowadzone na gruncie socjologii morskiej dotyczących polskich przedsiębiorstw gospodarki morskiej w czasach PRL. Następnie, na bazie badań jakościowych przeprowadzonych przez autorów, wyłoniono siedem głównych zagadnień jako podstawowych obszarów problemowych związanych z zarządzaniem załogami marynarzy na statku dalekomorskim. Analizie poddano cztery z nich: różnice kulturowe i zarządzanie różnorodnością, sfera publiczna, ekonomizacja funkcji personalnej, etos marynarza. Na zakończenie zaprezentowano praktyczne wskazówki dla zarządzających zasobami ludzkimi.
    This article looks at questions of changing conditions of work at sea. The authors recapitulate the main aspects of the working environment on a deep–sea vessel using maritime sociology based analyses conducted on Polish maritime enterprises during the period of the People’s Republic of Poland. Subsequently, based on qualitative research conducted by the authors, seven main questions were isolated as basic problem areas connected with the management of seamen on a deep–sea vessel. Four of them were subject to analyses: cultural differences and diversity management, the public sphere, the economizing of the personnel function, and the seaman ethos. Practical recommendations for human resource management are presented as a conclusion.
    Źródło:
    Zarządzanie Zasobami Ludzkimi; 2012, 6(89); 53-71
    1641-0874
    Pojawia się w:
    Zarządzanie Zasobami Ludzkimi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozwój sedymentacji warstw cergowskich jednostki grybowskiej (kamieniołom w Klęczanach, zachodnie Karpaty fliszowe)
    Sedimentary development of the Cergowa Beds of the Grybów Unit (Klęczany quarry, Polish Western Carpathians)
    Autorzy:
    Stadnik, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/183307.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Karpaty fliszowe
    okno tektoniczne Klęczan-Limanowej
    warstwy cergowskie
    głębokomorski stożek
    flysch Carpathians
    Klęczany-Limanowa tectonic window
    Cergowa Beds
    deep-sea fan
    Opis:
    The studies were focused on the Cergowa Beds within the northern part of Grybów Unit, the Klęczany-Limanowa tectonic window. The studied formations originated within deep-sea fan, further-more in the quarry there are sediments which belong to middle fan area (subenvironment of channel fill and its margin, interchannel sediments, levee sediments) and outer fan area (despositional lobe).
    Źródło:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2009, 35, 2/1; 23-29
    0138-0974
    Pojawia się w:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A framework of ichthyofaunal ecostratigraphy of the Oligocene-Early Miocene strata of the Polish Outer Carpathian basin
    Podstawy ekostratygrafii ichtiofaunistycznej osadów oligocenu-wczesnego miocenu basenu zewnętrznych Karpat Polskich
    Autorzy:
    Kotlarczyk, J.
    Jerzmańska, A.
    Świdnicka, E.
    Wiszniowska, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/191627.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    fossil fish collection
    Teleostei
    deep-sea sediments
    lithostratigraphy
    biostratigraphy
    fish ecoassemblages
    models of changes
    ichthyofaunal zonation
    ecostratigraphy
    Oligocene
    Early Miocene
    Outer Carpathians
    Polska
    Opis:
    The paper presents the results of an analysis of ichthyofaunal variability throughout the section of the Menilite-Krosno Series (MKS) in the Outer Carpathians of Poland. The studied tanathocoenoses were formed at the bottom of a more than 2,000 m deep northern basin of the Tethys, being largely represented by the continental rise and bottoms of its narrow furrows, and - to a lesser degree - the continental slope and slopes of a submarine high. Lateral variability of statististically representative assemblages of tanathocoenoses hosted in thin, isochro- nous horizons is interpreted as a result of both local changes of ichthyocoenoses and the influence of post-mortem relocation of fishes that mainly dwelled the shelf and upper continental slope. Vertical variability, in turn, is considered as a resulting from changeable conditions of the ecological environment, the input and outflow of taxa whose evolution proceeded in the Indo-Pacific area, and the species extinction. Changeability of ichthyofauna within a ca. 16-m.y.-long interval made it possible to document and formally describe 9 zones and 4 subzones of ichthyofauna of ecostratigraphic character. These zones comprise index, representative and accompanying taxa that belong to different ecological groups. Conceptual models of the origin of ichthyofaunal assemblages of individual zones are presented. It is suggested that the origin of assemblage differentiation resulted from the appearance and disappearance of the oxygen minimum zone in the water column, global and local sea level changes, topography of the basin bottom, as well as final basin infilling by sediments of submarine fans. The described and preserved collection of fossil Carpathian fishes, housed at the Department of Palaeozoology of the University of Wrocław, requires further specialized palaeontological studies in order to reconstruct a more complete composition of the Oligocene-Early Miocene ichthyofauna.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2006, 76, No 1; 1-111
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on Addition of Surfactants Agents to Improve the Behavior of High Water Content Sediment for Rare Earth Mining in Deep Sea
    Badanie wpływu odczynników powierzchniowych na poprawę właściwości osadu pod kątem głębinowego górnictwa pierwiastków rzadkich
    Autorzy:
    Sasaoka, Takashi
    Hamanaka, Akihiro
    Funatsu, Takahiro
    Shimada, Hideki
    Takahashi, Keisuke
    Powiązania:
    https://bibliotekanauki.pl/articles/318183.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    deep sea mining
    high water content sediment
    rare earth
    surfactants agent
    górnictwo głębinowe
    osad o dużej zawartości wody
    pierwiastki ziem rzadkich
    odczynniki powierzchniowe
    Opis:
    Importance of rare mineral metal resources is increasing currently. Therefore, the rare earth elements rich mud which exist on the deep-sea floor has the potential to be developed to fulfill their demand. As one of the effective mining method, a suction mining method is expected to apply to seabed mining. The seabed sediment containing rare earth element shows the very high water content, more than 100%. And the sediment movement during the suction is greatly affected by the water content (WC) and liquid limit (WL) of the material. Therefore, it is important to modify the liquid limit by adding a chemical agent to control the behavior of sediment. We selected eight different surfactants which can be divided into three types. They are dispersant type, water retention type, and thickener type. We carried out a liquid limit test and viscosity measurement of the sediment mixed with the agents. It is found that the water-absorbing polymer and the hydroxyethyl cellulose increase the liquid limit and viscosity. Whereas, the alkyl ammonium salt surfactant and the alkyl ammonium salt, alkyl aryl sulfonate blend decrease the liquid limit and viscosity. It is possible to control sediment behavior by adding suitable surfactants.
    Złoża metali rzadkich są bardzo ważne a ich istotność wzrasta w ostatnich latach. Zatem, dno morskie, które zawiera duże ilości tego typu pierwiastków posiada potencjał do zaspokojenia potrzeb w tym zakresie. Jako jedną z efektywnych metod górniczych w tym aspekcie należy traktować ssanie. Osad denny z dna morskiego, który zawiera pierwiastki ziem rzadkich wykazuje bardzo dużą zawartość wody. Ruch osadu podczas ssania jest uzależniony w dużym stopniu od zawartości wody (WC) oraz krytycznego limitu cieczy (WL) materiału. Zatem, ważnym jest aby zmodyfikować limit cieczy poprzez dodatek odczynnika chemicznego w celu kontrolowania zachowania się osadu. Wybrano osiem różnych odczynników powierzchniowych, które mogą być podzielona na trzy typy. Są to odczynniki typu dyspergującego, typu retencji wody oraz typu zagęszczającego. Przeprowadzono test limitu cieczy i pomiaru lepkości osadu wymieszanego z odczynnikami. Stwierdzono, że polimer absorbujący wodę oraz hydroksyetyloceluloza zwiększają limit cieczy oraz lepkość. Z kolei, sól amoniowo-alkilowa oraz blenda alkiloarylosulfonianowa zmniejszają te wielkości. Możliwa jest kontrola zachowania się osadu poprzez dodatek odpowiednich odczynników powierzchniowych.
    Źródło:
    Inżynieria Mineralna; 2020, 2, 1; 183-188
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The evolution of deep sea container routes: the Italian case
    Autorzy:
    Lupi, Marino
    Pratelli, Antonio
    Licandro, Cecilia
    Farina, Alessandro
    Powiązania:
    https://bibliotekanauki.pl/articles/961396.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    maritime transport
    Italian ports
    deep sea shipping
    DSS
    container routes
    port hinterland
    porty we Włoszech
    żegluga dalekomorska
    transport morski
    trasy kontenerowca
    zaplecze portu morskiego
    Opis:
    In this study, an analysis of deep sea shipping (DSS) container services, calling at Italian ports, is carried out. A comparison with analogous sets of data collected in the years 2011 and 2014 has been performed. The most important Italian port system is the Ligurian one, which includes the main Italian port, Genoa, which is the main access gate to the Padan Plain, the most productive area of Italy. However, other ports are also important: the Ligurian port of La Spezia and the hub port of Gioia Tauro. The comparison, with 2011 and 2014 data, has shown that while the number of DSS departures, from Italian ports, did not increase, the dimensions of the ships, which call at Italian ports, increased relevantly: this is in line with the current trend in container ship gigantism.
    Źródło:
    Transport Problems; 2019, 14, 1; 69-80
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obciążenia i naprężenia w pionowym rurociągu podczas wydobywania polimetalicznych konkrecji z dna oceanu
    Loads and tensions of vertical mining pipeline
    Autorzy:
    Żelazny, K.
    Szelangiewicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/350569.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    polimetaliczne konkrecje
    hydrauliczna instalacja wydobywcza
    obciążenia i naprężenia w rurze wydobywczej
    polimetallic nodules
    deep-sea mining hydraulic installation
    loads and tensions of a vertical mining pipe
    Opis:
    Jedną z metod wydobywania polimetalicznych konkrecji z dna oceanu jest metoda hydrauliczna z pompami głębinowymi. W metodzie tej, pionowy rurociąg wydobywczy o długości około 4000-6000 m jest opuszczony ze statku wydobywczego. Na ten rurociąg działają różne obciążenia i wymuszenia kinematyczne powodujące powstanie naprężeń i deformacji (odchyleń od pionu) kształtu rurociągu. W referacie przedstawione zostały wyniki badań symulacyjnych naprężeń występujących w rurociągu podczas prac wydobywczych.
    One of the methods to obtain polimetallic nodules from the ocean bed is hydraulic - with the use of deep-well pumps. In this method a vertical deep-see mining pipeline 4.000-6.000 m long is suspended from a vessel. The pipeline is subjected to various loads and kinematic forcing, which results in tension out of pipeline. This paper presents the results of simulation tests of loads and tensions of vertical mining pipeline.
    Źródło:
    Górnictwo i Geoinżynieria; 2011, 35, 4/1; 441-447
    1732-6702
    Pojawia się w:
    Górnictwo i Geoinżynieria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Odkształcenia i zmiany położenia pionowego rurociągu podczas wydobywania polimetalicznych konkrecji z dna oceanu
    Shape deformation of vertical mining pipeline
    Autorzy:
    Żelazny, K.
    Szelangiewicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/350577.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    polimetaliczne konkrecje
    hydrauliczne instalacja wydobywcza i deformacje kształtu i zmiany położenia rury wydobywczej
    polimetallic nodules
    deep-sea mining hydraulic installation
    shape deformations of a vertical mining pipe
    Opis:
    Jedną z metod wydobywania polimetalicznych konkrecji z dna oceanu jest metoda hydrauliczna z pompami głębinowymi. W metodzie tej, pionowy rurociąg wydobywczy o długości około 4000-6000 m jest opuszczony ze statku wydobywczego. Na ten rurociąg działają różne obciążenia i wymuszenia kinematyczne powodujące powstanie deformacji (odchyleń od pionu) kształtu rurociągu. W referacie przedstawione zostały wyniki badań symulacyjnych deformacji kształtu pionowego rurociągu możliwe podczas prac wydobywczych.
    One of the methods to obtain polimetallic nodules from the ocean bed is hydraulic - with the use of deep-well pumps. In this method a vertical deep-see mining pipeline 4.000-6.000 m long is suspended from a vessel. The pipeline is subjected to various loads and kinematic forcing, which out of shape deformations. This paper presents the results of simulation tests of shape deformations in deep-sea mining pipeline.
    Źródło:
    Górnictwo i Geoinżynieria; 2011, 35, 4/1; 449-456
    1732-6702
    Pojawia się w:
    Górnictwo i Geoinżynieria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A glimpse into ancient food storage: Sequestrichnia and associated nucleocave Chondrites from Eocene deep-sea deposits
    Autorzy:
    Šamánek, J.
    Vallon, L.H.
    Mikuláš, R.
    Vachek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/31341414.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Zoophycos brianteus
    Chondrites intricatus
    Helminthopsis tenuis
    Tubulichnium mediterranensis
    Scolicia strozzii
    Dactyloidites
    Megagrapton irregulare
    Planolites
    Eocene
    deep-sea deposit
    Zoophycos
    trace fossil
    fossil
    flysch
    Western Carpathians Mountains
    Czech Republic
    Źródło:
    Acta Palaeontologica Polonica; 2022, 67, 3; 767-779
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    DOC and POC in the water column of the Southern Baltic. Part I. Evaluation of factors influencing sources, distribution and concentration dynamics of organic matter
    Autorzy:
    Maciejewska, A.
    Pempkowiak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/48392.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    organic matter
    dissolved organic carbon
    particulate organic carbon
    seasonal variability
    vertical variability
    water column
    Baltic Sea
    Gotland Deep
    Gdansk Deep
    Bornholm Deep
    sea water
    marine environment
    Źródło:
    Oceanologia; 2014, 56, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ventilation of the Baltic Sea deep water: A brief review of present knowledge from observations and models
    Autorzy:
    Markus Meier, H.E.
    Feistel, R.
    Piechura, J.
    Arneborg, L.
    Burchard, H.
    Fiekas, V.
    Golenko, N.
    Kuzmina, N.
    Mohrholz, V.
    Nohr, C.
    Paka, V.T.
    Sellschopp, J.
    Stips, A.
    Zhurbas, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/47761.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Sopot
    ventilation
    conference
    Baltic Sea
    deep water
    turbulent mixing
    Opis:
    The ventilation of the Baltic Sea deep water is driven by either gale-forced barotropic or baroclinic salt water inflows. During the past two decades, the frequency of large barotropic inflows (mainly in winter) has decreased and the frequency of medium-intensity baroclinic inflows (observed in summer) has increased. As a result of entrainment of ambient oxygen-rich water, summer inflows are also important for the deep water ventilation. Recent process studies of salt water plumes suggest that the entrainment rates are generally smaller than those predicted by earlier entrainment models. In addition to the entrance area, the Słupsk Sill and the Słupsk Furrow are important locations for the transformation of water masses. Passing the Słupsk Furrow, both gravity-driven dense bottom flows and sub-surface cyclonic eddies, which are eroded laterally by thermohaline intrusions, ventilate the deep water of the eastern Gotland Basin. A recent study of the energy transfer from barotropic to baroclinic wave motion using a twodimensional shallow water model suggests that about 30% of the energy needed below the halocline for deep water mixing is explained by the breaking of internal waves. In the deep water decade-long stagnation periods with decreasing oxygen and increasing hydrogen sulphide concentrations might be caused by anomalously large freshwater inflows and anomalously high mean zonal wind speeds. In different studies the typical response time scale of average salinity was estimated to be between approximately 20 and 30 years. The review summarizes recent research results and ends with a list of open questions and recommendations.
    Źródło:
    Oceanologia; 2006, 48, S
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inflow waters in the deep regions of the Southern Baltic Sea - transport and transformations
    Autorzy:
    Piechura, J.
    Beszczynska-Moller, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47562.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    transport
    temperature
    deep region
    transformation
    Baltic Sea
    inflow water
    mixing
    Opis:
    A medium-sized inflow (about 200 km3 according to IOW data, - personal communication) of saline water into the southern Baltic Sea occurred during January 2003. Unlike any previously observed inflow, this one brought very cold water, of temperatures around 1-2oC and less. Since the temperature of the deep water in the southern Baltic before the inflow was exceptionally high (11-12oC), the inflowing waters produced dramatic changes and a steep temperature gradient. The movement of the inflowing waters through the deep basins and channels of the Baltic Sea from the Arkona Basin to the Gdańsk Deep during next 4-8 months is described. Frequent mesoscale structures and intensive mixing followed the eastward transport of the inflow water, particularly in the Bornholm Deep and Słupsk Furrow. The present paper is based on data collected during 6 cruises r/v "Oceania" between December 2002 and August 2003. The last cruise in August took place in order to assess the long-term consequences of the inflow.
    Źródło:
    Oceanologia; 2004, 46, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Circulation and winter deep-water formation in the Northern Red Sea
    Autorzy:
    Manasrah, R.
    Badran, M.
    Lass, H.U.
    Fennel, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/49153.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Aqaba Gulf
    eddy
    deep-water formation
    winter
    circulation
    Red Sea
    Opis:
    Water mass characteristics and circulation patterns in the Gulf of Aqaba and northern Red Sea were studied for the first time during the r/v ‘Meteor’ cruise leg 44/2 from February 21st to March 7th 1999 using temperature-salinity profiles and current observations. The deep water in the northern Red Sea had similar characteristics to the well-mixed upper 450 m of water in the Gulf of Aqaba. This indicates that the winter mixed waters of the Gulf of Aqaba contribute significantly to deep-water in the northern Red Sea. Mixing in the Gulf of Aqaba is an annually repeated event that starts with the cooling of the surface water during November–December and reaches a maximum, which in most years extends down the entire water column in March–April. Waters deeper than the mixed layer in the Gulf seems to be rather passive and play no specific role in water mass formation in the northern Red Sea. In contrast to the Gulf of Aqaba, the upper 200 m of the northern Red Sea were stratified (21.5–23.5◦C, and 40.0–40.3 PSU). Stratification at the Strait of Tiran was weak (21.6–22.0◦C, and 40.3–40.5 PSU) and disappeared abruptly in the Gulf of Aqaba (21.4–21.6◦C, and 40.6–40.7 PSU). A well-developed cyclonic gyre with a diameter of about 50–60 km and maximum velocity of about 0.4 m s−1 was observed in the stratified upper 200 m of the northern Red Sea waters. The gyre may contribute to the preconditioning for intermediate water formation in the northern Red Sea.
    Źródło:
    Oceanologia; 2004, 46, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Deep water masses in the Iceland Basin during the Last Interglacial (MIS 5e): Evidence from benthic foraminiferal data
    Autorzy:
    Lukashina, N.P.
    Bashirova, L.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/48259.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    deep water
    Holocene
    benthic foraminifera
    marine sediment
    lithological analysis
    Nordic Sea
    Źródło:
    Oceanologia; 2015, 57, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameterisation of a population model for Acartia spp. in the Southern Baltic Sea. Part 2. Egg production
    Autorzy:
    Dzierzbicka-Glowacka, L.
    Lemieszek, A.
    Zmijewska, M.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/48730.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    environment condition
    Baltic Sea
    Gdansk Deep
    Acartia
    population model
    copepod
    egg production
    Opis:
    The paper describes the modelling ofeg g production in Acartia spp. under changing environmental conditions in the southern Baltic Sea (Gdańsk Deep). The hypothesis (Sekiguchi et al. 1980) that the food-saturated rate of egg matter production is equivalent to specific growth rate ofco pepods is applied. The average number ofeggs produced per day by one Acartia female is obtained as a function ofg rowth rate, i.e. by multiplying exp gN3 − 1 from the growth rate of the nauplius stage equation by Wfemale/Wegg. The copepod model, reduced to a zerodimensional population model calibrated for Acartia spp. under the environmental conditions typical ofthe southern Baltic Sea, was used to determine the effects of temperature and food concentration on the growth rate ofeac h oft he model stages (see Part 1 – Dzierzbicka-Głowacka et al. 2009 – this issue). In this part, egg production as a function of the above parameters is evaluated. The rate of reproduction during the seasons in the upper layer ofthe Gdańsk Deep is also determined.
    Źródło:
    Oceanologia; 2009, 51, 2; 185-201
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Processes and factors influencing the through-flow of new deepwater in the Bornholm Basin
    Autorzy:
    Stigebrandt, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/49102.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    hydrographic condition
    Bornholm Basin
    salinity
    oxygen concentration
    vertical stratification
    deep water
    Baltic Sea
    Opis:
    This paper is based on the idea that the hydrographical conditions in the Bornholm Basin, and any other basin, can be understood from knowledge of general hydromechanical principles and basin-specific factors. Published results on the variability of the vertical stratification are shown and discussed. Such analyses demonstrate the residence time of water at different depth levels. Different modes of currents forced by winds and by stratification gradients at open vertical boundaries are presented. Vertical mixing is discussed and published results for the Bornholm Basin are shown. An experiment demonstrates that the diffusive properties of the enclosed basin, i.e. below the sill depth of the Słupsk Furrow, can be computed quite well from the horizontal mean vertical diffusivity obtained from historical hydrographical observations. A published two decades long simulation of the vertical stratification shows that the through flow and modification of new deepwater in the Bornholm Basin can be well described based on existing knowledge regarding crucial hydromechanical processes. It also suggests, indirectly, that there should be a weak anticyclonic circulation above the sill depth, which is supported by current measurements.
    Źródło:
    Oceanologia; 2017, 59, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First record of the deep-water shark Etmopterus spinax (Chondrichthyes: Etmopteridae) from the Southern Baltic Sea (Pomeranian Bay)
    Autorzy:
    Wiecaszek, B.
    Sobecka, E.
    Panicz, R.
    Keszka, S.
    Gorecka, K.
    Linowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/48454.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Etmopterus spinax
    deep-water shark
    Anisakis simplex
    Chondrichthyes
    Etmopteridae
    Pomeranian Bay
    Baltic Sea
    Źródło:
    Oceanologia; 2018, 60, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synoptic changes in the deep rim current during stagnant hydrographic conditions in the Eastern Gotland Basin, Baltic Sea
    Autorzy:
    Hagen, E.
    Feistel, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/49138.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Gotland Basin
    hydrography
    deep water condition
    current measurement
    Baltic Sea
    Baltic Monitoring Programme
    Opis:
    Hydrographic and current measurements are analysed for stagnant deep-water conditions over the south-eastern topographic flank of the Eastern Gotland Basin (EGB) in April 2000. Results suggest a prevailing barotropic motion mode on a synoptic scale of several days. Deep along-slope volume transports derived from subsurface current meter moorings are compared with those of the baroclinic fraction of geostrophic motions crossing the plane of a hydrographic section. This was aligned perpendicular to deep isobaths and was repeated 40 times with a time step of six hours. Changes in regional winds produced a quasi-ten day cycle in the filling level of the Baltic Proper. Associated wave-like fluctuations of the mass field propagated cyclonically with a velocity of about 0.04 m s−1 around the deep basin’s rim. It is concluded that associated changes in deep volume transports result mainly from barotropically governed advection processes and that those of the baroclinic component of geostrophic currents provide a qualitatively and quantitatively quite inaccurate description of related transport fluctuations on a daily scale.
    Źródło:
    Oceanologia; 2007, 49, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temporal and spatial evolution of the Baltic deep water renewal in spring 2003
    Autorzy:
    Feistel, R.
    Nausch, G.
    Matthaus, W.
    Hagen, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/48009.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    temporal evolution
    inflow
    spring
    deep water renewal
    Baltic Sea
    oxygen condition
    spatial evolution
    Opis:
    In January 2003, a deep-water renewal process in the Baltic Sea commenced with an inflow of about 200 km3 of cold and well oxygenated water from the Kattegat, half of which was of salinity >17 PSU; it is considered to be the most important inflow since 1993. Related front propagation and the ventilation of anoxic waters between the western and the central Baltic were recorded by the Darss Sill measuring mast, the Arkona Basin buoy, a subsurface mooring in the Eastern Gotland Basin, and hydrographic research cruises conducted in January, February, March, May and August 2003. Already in May, the central Gotland Basin was reached by water with near-bottom oxygen concentrations among the highest ever recorded there. A comprehensive review of the observed spatial and temporal structures together with additional background data is presented. Estimates of the intensity of the present inflow are discussed.
    Źródło:
    Oceanologia; 2003, 45, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Property Issues Relating to Deep-Seabed Mining in the Light of the United Convention on the Sea of 1982
    Autorzy:
    Hennicke, Larisa
    Powiązania:
    https://bibliotekanauki.pl/articles/684924.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    right to property
    deep-seabed mining
    United Convention on the Sea of 1982
    Opis:
    The study aims at the evaluation of the right to property in the context of the deep-seabed mining. The author present deep-seabed mining in the light of the United Convention on the Sea of 1982 focusing on the lack of knowledge about the oceans and the lack of regulations regarding the protection and enhancement of the oceans.
    Źródło:
    Adam Mickiewicz University Law Review; 2014, 4; 207-212
    2450-0976
    Pojawia się w:
    Adam Mickiewicz University Law Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diurnal variations in nitrogen, phosphorus and iron compounds in the Southern Baltic Sea
    Autorzy:
    Sikorowicz, G.
    Falkowska, L.
    Burska, D.
    Dunajska, D.
    Pryputniewicz, D.
    Magulski, R.
    Lewandowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47649.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    iron
    nutrient
    Gdansk Deep
    nitrogen
    density stratification
    diurnal variation
    Baltic Sea
    oxygen condition
    phosphorus
    Opis:
    In order to assess their short-term variability, nutrient concentrations were measured at standard depths at 2 h intervals in the deepest region of the Gdańsk Deep during the first ten days of June 2001. The mean concentrations of nutrients in the euphotic zone were: NN (NO2 −, NO3 −, NH4 +) – 1.93 μmol dm−3, PO4 3− – 0.12 μmol dm−3 and Fetot – 0.11 μmol dm−3. During daylight hours, when the rate of assimilation was fastest, concentrations of nitrogen, phosphorus and iron compounds were very low. The phosphate concentration fell to a minimum (0.03 μmol dm−3) between 04:00 and 10:00 hrs, while total iron dropped to 0.01 μmol dm−3 between 10:00 and 16:00 hrs. Both levels were below the limiting values for phosphorus and iron. At night, concentrations of NO3 − and PO4 3− rose by 25%, those of NH4 + and Fetot by 35%. The mean molar ratios of NN:PO4 3− and Fetot:PO4 3− in the surface layer were subject to significant daily fluctuations. The molar NN:PO4 3− ratio was higher than the optimum value established for the Baltic Sea. Below the halocline, the concentrations of dissolved iron and phosphorus rose as a result of diffusion from sediments in response to changing redox conditions.
    Źródło:
    Oceanologia; 2005, 47, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stratification of particulate organic carbon and nitrogen in the Gdańsk Deep (Southern Baltic Sea)
    Autorzy:
    Burska, D.
    Pryputniewicz, D.
    Falkowska, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/47610.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    stratification
    Gdansk Deep
    nitrogen
    particulate organic carbon
    carbon
    particulate organic nitrogen
    flux
    Baltic Sea
    Opis:
    Particulate organic carbon (POC) and nitrogen (PON) concentrations and fluxes were measured during an experiment in the Gdańsk Deep in late spring (30.05. –06.06.2001). The vertical POC and PON concentration profiles were characterised by the highest values in the euphotic layer,a gradual decrease with depth, and an increase below the halocline. The hydrophysical conditions had a decisive impact on POC and PON fluxes in the water column. Preferential removal of nitrogen from suspended mater was observed in the entire water column (maximum – in the vicinity of thermocline). There were also differences in the diurnal effectiveness of nitrogen removal as compared to carbon removal. The removal rate was highest at night.
    Źródło:
    Oceanologia; 2005, 47, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inflow waters in the deep regions of the Southern Baltic Sea - transport and transformations
    Autorzy:
    Piechura, J.
    Beszczynska-Moller, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/48744.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    transport
    temperature
    hydrography
    deep region
    transformation
    environment
    salinity
    Baltic Sea
    ecosystem
    inflow water
    mixing
    Opis:
    A medium-sized inflow (about 200 km3 according to IOW data, – personal communication) of saline water into the southern Baltic Sea occurred during January 2003. Unlike any previously observed inflow, this one brought very cold water, of temperatures around 1–2◦C and less. Since the temperature of the deep water in the southern Baltic before the inflow was exceptionally high (11–12◦C), the inflowing waters produced dramatic changes and a steep temperature gradient. The movement of the inflowing waters through the deep basins and channels of the Baltic Sea from the Arkona Basin to the Gdańsk Deep during next 4–8 months is described. Frequent mesoscale structures and intensive mixing followed the eastward transport of the inflow water, particularly in the Bornholm Deep and Słupsk Furrow. The present paper is based on data collected during of 6 cruises r/v ‘Oceania’ between December 2002 and August 2003. The last cruise in August took place in order to assess the long-term consequences of the inflow.
    Źródło:
    Oceanologia; 2003, 45, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unusual Baltic inflow activity in 2002-2003 and varying deep-water properties
    Autorzy:
    Feistel, R.
    Nausch, G.
    Hagen, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/48654.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Sopot
    temperature
    inflow
    residence time
    deep water renewal
    conference
    salinity
    Baltic Sea
    Baltic Monitoring Programme
    Opis:
    The unusual sequence of inflow events into the Baltic Sea that occurred in 2002 and 2003 includes the first ever important baroclinic inflow to be described (August 2002), the Major Baltic Inflow (January 2003), which gave rise to the highest oxygen levels in the Gotland Deep since the 1930s, and the baroclinic inflow (August 2003) that elevated the Gotland Basin deep water salinity to values last observed in 1977, and caused the surface salinity to rise again. From these trend changes, salt residence times were estimated at about 20 years in the deep waters and 30 years above the pycnocline. Ventilation of the remote Karlsö Deep took until 2005, two years after the inflow event responsible, at a time when the Bornholm and Eastern Gotland Basins were already returning to stagnation.
    Źródło:
    Oceanologia; 2006, 48, S
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustic Identification of Dolphin Whistle Types in Deep Waters of Arabian Sea Using Wavelet Threshold Denoising Approach
    Autorzy:
    Mahanty, Madan Mohan
    Cheenankandy, Sanjana M.
    Latha, Ganesan
    Raghuraman, Govindan
    Venkatesan, Ramasamy
    Powiązania:
    https://bibliotekanauki.pl/articles/31339921.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    deep water ambient noise
    Arabian Sea
    wavelet threshold denoising
    impulsive shackle noise
    dolphin whistle types
    Opis:
    In situ time series measurements of ocean ambient noise, have been made in deep waters of the Arabian Sea, using an autonomous passive acoustic monitoring system deployed as part of the Ocean Moored buoy network in the Northern Indian Ocean (OMNI) buoy mooring operated by the National Institute of Ocean Technology (NIOT), in Chennai during November 2018 to November 2019. The analysis of ambient noise records during the spring (April–June) showed the presence of dolphin whistles but contaminated by unwanted impulsive shackle noise. The frequency contours of the dolphin whistles occur in narrow band in the range 4–16 kHz. However, the unwanted impulsive shackle noise occurs in broad band with the noise level higher by ~20 dB over the dolphin signals, and it reduces the quality of dolphin whistles. A wavelet based threshold denoising technique followed by a subtraction method is implemented. Reduction of unwanted shackle noise is effectively done and different dolphin whistle types are identified. This wavelet denoising approach is demonstrated for extraction of dolphin whistles in the presence of challenging impulsive shackle noise. Furthermore, this study should be useful for identifying other cetacean species when the signal of interest is interrupted by unwanted mechanical noise.
    Źródło:
    Archives of Acoustics; 2023, 48, 1; 39-48
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computation of energy for diapycnal mixing in the Baltic Sea due to internal wave drag acting on wind-driven barotropic currents
    Autorzy:
    Nohr, C.
    Gustafsson, B.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/48609.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    North Sea
    barotropic motion
    computation
    deep water
    halocline
    internal wave
    saline water
    sea level
    seasonal thermocline
    shallow water
    stratification
    surface area
    turbulent mixing
    water exchange
    wind force
    Opis:
    The pathways of energy supply for mixing the deep waters of the Baltic Sea is largely unknown. In this paper, a parameterization of the internal wave drag forces on barotropic motion is developed and implemented into a two-dimensional shallow water model of the Baltic Sea. The model is validated against observed sea levels. The dissipation of barotropic motion by internal wave drag that is quantified from the model results show that breaking internal waves generated by wind forced barotropic motions can contribute significantly to diapycnal mixing in the deep water of the Baltic Sea.
    Źródło:
    Oceanologia; 2009, 51, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Particulate organic carbon in the Southern Baltic Sea: numerical simulations and experimental data
    Autorzy:
    Dzierzbicka-Glowacka, L.
    Kulinski, K.
    Maciejewska, A.
    Jakacki, J.
    Pempkowiak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/48082.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    Gdansk Deep
    calcification
    carbon cycle
    detritus
    nutrient
    organic compound
    organic matter
    particulate organic carbon
    photosynthesis
    phytoplankton
    primary production
    sea water
    validation
    zooplankton
    Opis:
    Particulate Organic Carbon (POC) is an important component in the carbon cycle of land-locked seas. In this paper, we assess the POC concentration in the Gdańsk Deep, southern Baltic Sea. Our study is based on both a 1D POC Model and current POC concentration measurements. The aim is twofold: (i) validation of simulated concentrations with actual measurements, and (ii) a qualitative assessment of the sources contributing to the POC pool. The POC model consists of six coupled equations: five diffusion-type equations for phytoplankton, zooplankton, pelagic detritus and nutrients (phosphate and total inorganic nitrogen) and one ordinary differential equation for detritus at the bottom. The POC concentration is determined as the sum of phytoplankton, zoo-plankton and pelagic detritus concentrations, all expressed in carbon equivalents. Bacteria are not simulated in this paper. The observed large fluctuations of POC concentrations are attributed to its appreciable seasonal variability. The maximum concentration of POC varied between 870 mgC m−3 in May and 580 mgC m−3 in September, coinciding with the period of maximum dead organic matter and phytoplankton biomass concentrations. The results of the numerical simulations are in good agreement with observed values. The difference between the modelled and observed POC concentrations is equal to 3–28% and depends on the month for which the calculations were made, although no time trend of the difference is observed. The conclusion is that the numerical simulations are a ufficiently good reflection of POC dynamics in the Baltic.
    Źródło:
    Oceanologia; 2010, 52, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameterisation of a zero-dimensional pelagic detritus model, Gdańsk Deep, Baltic Sea
    Parametryzacja modelu detrutusu pelagicznego, Głębia Gdańska, Morze Bałtyckie
    Autorzy:
    Kuliński, K.
    Maciejewska, A.
    Dzierzbicka-Głowacka, L.
    Pempkowiak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1819502.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    parametryzacja MDP
    Morze Bałtyckie
    Głębia Gdańska
    stężenie POC
    parameterization of MDP
    Baltic Sea
    Gdańsk Deep
    POC concentration
    Opis:
    This paper presents a zero-dimensional particulate detritus model (Figure 1) and a comprehensive description of parameterisation processes that influence the non-living organic matter (detritus) concentration in the whole water column. Mathematically, the particulate pelagic detritus concentration can be described as a variable dependent on the number of its sources and sinks. Temporal supplies in the pelagic detritus concentration are affected by the natural mortality of phytoplankton and zooplankton as well as by the faecal pellets that enter the detritus pool. On the other hand, sedimentation, grazing of detritus by zooplankton and mineralization of pelagic detritus act as sinks that reduce the detritus concentration in the water column. The aim of this model study was to calibrate the detritus model under the environmental conditions typical of the Gdańsk Deep in the southern Baltic Sea.
    Przedmiotem badań jest parametryzacja zero wymiarowego Modelu Detrytusu Pelagicznego (PDM). Stężenie detrytusu pelagicznego w wodzie morskiej jest determinowane równowagą ustaloną pomiędzy źródłami i ubytkami martwej, zawieszonej materii organicznej. Do źródeł zalicza się: śmiertelność fito- i zooplanktonu oraz odchody zooplanktonu. Wśród ubytków detrytusu wyróżnić można natomiast sedymentację, wyżeranie przez zooplankton oraz rozkład biochemiczny. Przedstawione badania opisują oddziaływanie temperatury, stężenia związków biogenicznych, nasłonecznienia oraz biomasy fito- i zooplanktonu na stężenie detrytusu pelagicznego w wodzie morskiej. Parametryzacja przeprowadzona została w typowych dla południowego rejonu Morza Bałtyckiego zakresach zmiennych. Detrytus pelagiczny razem z fito- i zooplanktonem są komponentami niezbędnymi do opisania zmienności stężeń zawieszonego węgla organicznego (POC) będącego istotnym składnikiem obiegu węgla w środowisku morskim. Prawidłowa parametryzacja PDM stanowi zatem podstawę dla numerycznego opisu aktualnej i przyszłej zmienności stężeń POC w wodzie Morza Bałtyckiego.
    Źródło:
    Rocznik Ochrona Środowiska; 2011, Tom 13; 187-206
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparison between the suspended sediment concentrations derived from DELFT3D model and collected using transmissometer — a case study in tidally dominated area of Dithmarschen Bight
    Autorzy:
    Rahbani, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48938.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sediment concentration
    suspended sediment concentration
    DELFT3D model
    numerical model
    North Sea
    deep water
    shallow water
    Źródło:
    Oceanologia; 2015, 57, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface waves in deep and shallow waters
    Autorzy:
    Massel, S.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48826.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    surface wave
    deep
    shallow water
    dynamic factor
    marine environment
    atmosphere-ocean interaction
    ocean form
    air-sea interface
    hydrodynamics
    Opis:
    The motion of water due to surface waves is the most dynamic factor observed in the marine environment. In this review various aspects of the wave modelling of non-linear, steep surface waves and their role in the atmosphere-ocean interaction are discussed. Significant improvements in wave forecasting have been made in the last ten years. This is to a large extent related to substantial progress in the description of wind forcing and other processes, as well as to the more efficient use of satellite observations and assimilation methods. One striking observation is the increasing variety and complexity of models in which more physical processes are implemented, greater precision and resolution achieved and extended ranges of applicability demonstrated. However, in order to evaluate the applicability of particular models, comparison with high quality experimental data, collected in nature or under laboratory conditions, is necessary.
    Źródło:
    Oceanologia; 2010, 52, 1; 5-52
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Verification of Quasi-Determinism theory against Baltic Sea Data
    Autorzy:
    Antão, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/108522.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
    Tematy:
    quasi-determinism theory
    deep water waves
    Baltic Sea
    AWAC measurements
    freak waves
    teoria quasi-determinizmu
    pomiary AWAC
    falowanie
    Morze Bałtyckie
    Opis:
    The second formulation of Boccotti’s quasi-determinism theory is investigated. Deep water wave records collected in the Baltic Sea with AWAC (Nortek Acoustic Wave and Current profiler) are used in this study. The adequacy of Boccotti’s theory for Baltic Sea conditions is evaluated on the basis of some simulations of wave groups with a very large maximum wave height. The large waves are chosen using an abnormality index (ratio of maximum wave height to significant wave height) with a value greater than 2. Such values of this index are also used by different authors for the definition of freak waves. In order to obtain better results, JONSWAP formula is fitted to the measured spectra instead of using default JONSWAP parameters for the simulations. Verification of values of spectral parameters obtained from the autocovariance function against the same parameters calculated from smoothed and not smoothed spectra is presented. Much attention is given to spectral peak period value. The spectral width parameter, in QD theory known as narrow bandedness parameter, requires further investigation as the results obtained here did not allow the formulating of any functional relation with another – more often used – spectral width parameter. The low frequency of sampling of the data allowed only the most important aspects of the theory to be checked. A short Matlab function used in QD simulations is presented.
    Źródło:
    Meteorology Hydrology and Water Management. Research and Operational Applications; 2018, 6, 2; 11-20
    2299-3835
    2353-5652
    Pojawia się w:
    Meteorology Hydrology and Water Management. Research and Operational Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the possibility of convective overturning in the Slupsk Furrow overflow of the Baltic Sea
    Autorzy:
    Zhurbas, V.
    Elken, J.
    Paka, V.
    Piechura, J.
    Chubarenko, I.
    Vali, G.
    Golenko, N.
    Shchuka, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/48298.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    deep water
    dense water
    density stratification
    gravity current
    numerical simulation
    saline water
    Slupsk Furrow
    transverse circulation
    water mass
    Opis:
    Closely spaced CTD transects across the Słupsk Furrow displayed a ‘downward- bending’ of salinity contours below the salinity interface on the southern flank due to a transverse circulation in the saline water overflow. Numerical simulation of a gravity current in an idealized channel with geometry, dimensions and initial density stratification all much the same as in the Słupsk Furrow was applied to verify whether the downward-bending could be transformed into an inverted density stratification. Some arguments in favour of the possibility of convective overturning due to the differential transverse advection beneath the gravity current, brought on by the numerical simulations, are discussed.
    Źródło:
    Oceanologia; 2011, 53, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrographic and hydrochemical conditions in the Gotland Deep area between 1992 and 2003
    Autorzy:
    Nausch, G.
    Matthaus, W.
    Feistel, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48546.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    nutrient pool
    temperature
    hydrography
    hydrochemical condition
    ventilation
    nutrient distribution
    bottom water
    salinity
    Baltic Sea
    stagnation period
    hydrographic condition
    Gotland Deep
    Opis:
    The paper describes the hydrographic-hydrochemical development in the eastern Gotland Basin between the major saltwater inflows into the Baltic Sea in 1993 and 2003. This period is characterised by only low inflow activity. The most important hydrographic events were the effects of the very strong inflow in 1993 and the weak inflows in 1993/1994 and 1997. The 1993/1994 inflows led to deep-water renewal, a steep fall in deep-water temperatures, and increasing salinity. The effects of the inflow of very warm, saline and oxygen-rich water in autumn 1997 were observed in the deep water in 1998, resulting in temperatures rising to 7◦C. The recent renewal in spring 2003 is reflected in the decreasing temperature, higher salinity and improved ventilation of the bottom water. Changes in the redox conditions exert a considerable influence on the nutrient distribution. During stagnation periods, there is enrichment of phosphate and ammonium, while nitrate is absent. Thus, around 31 μmol l−1 ammonium and 7 μmol l−1 phosphate were measured prior to the water renewal in 2003. Deepwater ventilation results in lower phosphate concentrations of around 2 μmol l−1, the nitrification of ammonium and the occurrence of nitrate. For the observation period, an estimate of nutrients stored in the deep water was done for the eastern Gotland Basin. During the recent stagnation period, there was an increase of up to 150% in the phosphate pool below the halocline, whereas the pool of inorganic nitrogen compounds decreased to 80% compared with 1992 when the previous stagnation period had ended. Under specific circumstances, these unbalanced nutrients can be made available to the upper water layers and can induce large-scale blooms of algae, especially of cyanobacteria.
    Źródło:
    Oceanologia; 2003, 45, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seasonal changes in particulate organic matter (POM) concentrations and properties measured from deep areas of the Baltic Sea
    Autorzy:
    Winogradow, A.
    Mackiewicz, A.
    Pempkowiak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/47588.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    particulate organic matter
    seasonal change
    particulate organic carbon
    chlorophyll a
    heterotrophic bacteria
    zooplankton
    dissolved organic compound
    nutrient
    deep water
    Baltic Sea
    Źródło:
    Oceanologia; 2019, 61, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bacterial utilization of carbohydrates in the surface seawater layers of the Gdansk Deep
    Autorzy:
    Mudryk, Z.
    Skorczewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/84994.pdf
    Data publikacji:
    1997
    Wydawca:
    Akademia Pomorska w Słupsku
    Tematy:
    bacterial utilization
    carbohydrate
    surface water
    sea water
    water layer
    Gdansk Deep
    neustonic bacteria
    planktonic bacteria
    microflora
    dissolved organic matter
    chemical composition
    Źródło:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 1997, 01
    1643-0115
    Pojawia się w:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Benthic diffusive fluxes of organic and inorganic carbon, ammonium and phosphates from deep water sediments of the Baltic Sea
    Autorzy:
    Lengier, M.
    Szymczycha, B.
    Brodecka-Goluch, A.
    Klostowska, Z.
    Kulinski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078878.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    biogeochemistry
    benthic flux
    organic carbon
    organic matter
    remineralization
    dissolved organic carbon
    dissolved inorganic carbon
    ammonium
    phosphate
    oxygen availability
    deep water sediment
    Baltic Sea
    Opis:
    In this study, Baltic Sea sediments, as a source of dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), ammonium (NH4 +), and phosphates (PO4 3−), were investigated based on samples obtained in 2017 and 2018, shortly after a sequence of inflows from the North Sea that occurred between 2014 and 2017. Two different data sets (I and II) were used to assess benthic diffusive fluxes and thus elucidate both the temporal conditions at the time of sampling (data set I) and the diffusion potential of the sediments (data set II). The estimated fluxes were characterized by a high spatial variability within the whole Baltic Sea and ranged between −0.01 and 3.33 mmol m−2 d−1 for DIC, −0.02 and 0.44 mmol m−2 d−1 for DOC, −40.5 and 1370.1 μmol m−2 d−1 for NH4 +, and −5.9 and 60.9 μmol m−2 d−1 for PO4 3−. The estimated benthic diffusive fluxes indicated a high potential for DIC, DOC, NH4 +, and PO4 3− release from Baltic Sea sediments. The high O2 concentrations in the water column of the Gulf of Bothnia together with major Baltic inflows (MBIs) bringing oxygenated seawater to the Baltic Proper and to some extent the Eastern Gotland Basin regulate the amounts of chemicals released from the sediment. Our study showed that a sequence of inflows has greater impact on the diminution of diffusive fluxes than does a single MBI and that the sediments of the Baltic Proper, even under the influence of inflows, are an important source of C, N, and P (159 kt yr−1 for DIC+DOC, 6.3
    Źródło:
    Oceanologia; 2021, 63, 3; 370-384
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the geometry of ocean surface waves
    Autorzy:
    Massel, S.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48766.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    air-sea interaction
    atmosphere-ocean interaction
    deep water
    dynamic factor
    geometry
    irregular wave
    marine environment
    ocean surface
    regular wave
    shallow water
    surface wave
    water motion
    wave breaking
    wave slope
    Opis:
    The factors influencing the atmosphere-ocean transfer of mass and momentum, as well as incipient wave breaking and the amount of energy dissipated due to breaking, are discussed in detail. In particular, the influence of directional spreading on the statistics of surface wave slopes and the area of the wind- roughened ocean surface is demonstrated. Theoretical analysis and comparison with the available experimental data show that unimodal directional spreading is not able to reproduce the observed ratio of the cross-wind/up-wind mean square slopes. Better agreement is achieved when bimodal directional spreading, consisting of two wrapped-Gaussian distributions, is applied. The bimodal form suggested by Ewans (1998) is used in the paper. Moreover, the formulae developed here show that the increase in the area due to surface waves is rather small for both regular and irregular waves.
    Źródło:
    Oceanologia; 2011, 53, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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