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    Wyświetlanie 1-5 z 5
    Tytuł:
    What can be learned about the deposition and compaction of peat from the Miocene lignite seam exposed in the Chłapowo Cliff on the Polish coast of the Baltic Sea?
    Autorzy:
    Widera, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/184511.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Baltic Sea coast
    lignite
    peat
    deposition
    compaction ratio
    Opis:
    This study focuses on discussing the relationship between the accumulation of peat and its compaction in the overbank zone of the Miocene river system. The examined 2nd Lusatian lignite seam is characteristically interbedded with sandy deposits and these are less compressible than peat. Therefore, in favourable conditions such as those found at Chłapowo Cliff (on the Baltic Sea coast in northern Poland), it is possible to identify the effects of an even or uneven lowering of the mire surface, resulting from diversified compaction of the underlying phytogenic beds. The research problem was applied to two examples located close to each other within the lignite seam. The first case shows the accumulation of fresh peat layers of almost equal thickness, while the second one presents a reduction in the thickness of fresh peat beds over the fossilised channel-fill sandy body. Only the latter example allows us to calculate the peat-to-lignite compaction ratio. The results of the compaction ratio obtained, Cr ≈ 7.37, mean that the youngest, fresh peat layers were compacted at least 7 times, transforming them into lignite beds. However, such a high compaction value, estimated for the top layers of the Miocene mire, cannot be directly taken into account when reconstructing the total thickness of the peat seam prior to covering it with mineral overburden. The published peat-to-lignite compaction ratios, determined using other research methods, for the 2nd Lusatian lignite seam or its stratigraphic equivalents range from 1.7 to 6.0 in most cases, with averages of 2.2 to 4.0. The differences between the data in the literature and the results given in this paper are due to the fact that the process of peat/lignite compaction is ongoing and cumulative.
    Źródło:
    Geology, Geophysics and Environment; 2019, 45, 2; 111-119
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A multidisciplinary study on the palaeoenvironmental history of the Resko Przymorskie Lake spit during the Late Glacial and Holocene (the southern Baltic coast, NW Poland)
    Autorzy:
    Sydor, P.
    Krzymińska, J.
    Rzodkiewicz, M.
    Kotrys, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059656.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    sedimentology
    pollen
    diatom
    ostracods
    molluscs
    palaeogeography
    Baltic Sea coast
    Opis:
    The paper presents the results of sedimentological and biostratigraphical analyses from the Resko Przymorskie Lake spit (NW Poland), supported by radiocarbon datings. The study has aimed to recognize the geological structure of the spit and its base and to recognize the palaeoenivronmental changes. Nine sedimentary series composing the Resko Przymorskie Lake spit have been distinguished (I–IX). The oldest sediments are the Vistulian Glaciation till (series I) and fluvioglacial sand and gravel (series II). In the Early Holocene, in the study area there was a river valley (series III) followed by a shallow water basin (series IV), which was replaced by a peat bog (series V). In the Atlantic (7.4 ka cal BP), the water level rose (Littorina transgression) and accumulation of lagoonal sediments started (series VI). Biostratigraphic analysis of deposits in series VI indicates a marine influence. In the Atlantic and Subboreal, the spit moved southwards and fine sand (series VII) was deposited on lagoonal gyttja and silt (series VI). In the western part of the study area, peat accumulated (series VIII), dated at 6.7 ka cal BP (Late Atlantic). The youngest series IX is composed of aeolian fine sand in white dunes that formed in the last 400 years.
    Źródło:
    Geological Quarterly; 2015, 59, 3; 531--550
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Coastal dunes of the Baltic Sea shores: a review
    Autorzy:
    Łabuz, Tomasz Arkadiusz
    Grunewald, Ralf
    Bobykina, Valentina
    Chubarenko, Boris
    Česnulevičius, Algimantas
    Bautrėnas, Artūras
    Morkūnaitė, Regina
    Tõnisson, Hannes
    Powiązania:
    https://bibliotekanauki.pl/articles/1051573.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    coastal dunes
    dune relief
    barrier types
    dune distribution
    Baltic Sea coast
    Opis:
    The article summarises results of studies conducted along the Baltic Sea sandy coasts by scientists involved in coastal dune research, and presents an attempt to describe the types and distribution of dune coasts. The Baltic Sea coasts feature lower and higher foredunes. The lowland behind the coastal dune belt is covered by wandering or stabilised inland dunes – transgressive forms, mainly parabolic or barchans. The source of sediment for dune development includes fluvioglacial sands from eroded coasts, river-discharged sand, and older eroded dunes. Due to the ongoing erosion and coastal retreat, many dunes have been eroded, and some are withdrawing onto the adjacent land. There are visible differences between the south-eastern, western, and northern parts of the Baltic Sea coast with respect to dune development. The entire southern and eastern coast abounds in sand, so the coastal dunes are large, formerly or currently wandering formations. The only shifting dunes are found at the Polish and the Russian–Lithuanian coasts on the Łebsko Lake Sandbar as well as on the Vistula and Curonian Spits. The very diverse shoreline of the south-western coast experiences a scarcity of larger sandy formations. Substantial parts of the Baltic Sea sandy coasts have been eroded or transformed by humans. The northern part of the Baltic Sea coast features mainly narrow and low sandy coasts (e.g. in Estonia). Further north, sandy dunes are virtually absent.
    Źródło:
    Quaestiones Geographicae; 2018, 37, 1; 47-71
    0137-477X
    2081-6383
    Pojawia się w:
    Quaestiones Geographicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conditions and rate of extreme dunes abrasion at the Pomeranian Bay
    Autorzy:
    Tylkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/295130.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    abrasion of dunes
    extreme geomorphological events
    Baltic Sea coast
    storm surges
    atmospheric circulation
    Opis:
    This paper presents the temporal and spatial variability of the abrasion dynamics of the dunes located on the coast of the Southern Baltic Sea within the Polish section of the Pomeranian Bay between 1986 and 2008. The study presents long-term tendencies and daily dynamics of coastal dunes abrasion, being the consequence of intensive storm surges. Systematic, quantitative measurements of the abrasion of dunes were performed by the Maritime Offices in Szczecin, Słupsk and Gdynia within the sections of the dune coast most severely affected by abrasion. To determine the origin of the abrasion of dunes, the key hydro-meteorological conditions that determine the geomorphological changes of coastal sea areas, such as types of atmospheric circulation and the maximal sea levels during storm surges, were reviewed. The study also shows the maximal sea level thresholds that can determine the potential dynamics of coastal dunes abrasion at the Pomeranian Bay.
    Źródło:
    Landform Analysis; 2014, 27; 45-54
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recognition of the vibriosis risk in Polish coastal waters of the Baltic Sea and public engagement in its mitigation
    Autorzy:
    Rakowski, Marcin
    Mytlewski, Adam
    Piwowarczyk, Joanna
    Powiązania:
    https://bibliotekanauki.pl/articles/27314683.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    bacterioplankton
    Baltic Sea coast
    climate change
    mitigation measures
    Nature-based Solutions
    Polish case
    public awareness
    Vibrio vulnificus
    Opis:
    The surface water temperature in the Baltic Sea has been growing as a consequence of broader changes of the Earth’s climate, which contributes to the proliferation of natural bacterioplankton and new types of bacteria, such as Vibrio vulnificus, in the region. This pathogenic bacterium finds optimal conditions for growth primarily in warm brackish waters. Places particularly vulnerable to these bacteria include shallow Baltic coastal waters where the proliferation of Vibrio strains increases in summer. The growing temperature of coastal waters boost this phenomenon, posing a serious threat to human health and the coastal Baltic tourism. The BaltVib project implemented by marine microbiologists investigates the impact of the so-called “system engineers”, e.g. mussels, macroalgae, and seagrass, on the diversity and abundance of vibriosis. The research should help to develop strategies to mitigate the problem of excessive populations of vibriosis through nature-based solutions. In addition to environmental and health issues, public awareness of the phenomena and future threats are equally important and these are also addressed in the project. The article presents results of a survey conducted on the Polish coast involving 140 respondents interviewed concerning their awareness of the increasing population of pathogenic vibriosis. The survey helped to diagnose how local residents perceive the threat to human health posed by Vibrio vulnificus now and in the future, as well as possible impacts these bacteria might have on economic use of the coastal waters. The survey also investigated the level of acceptance for various methods used to mitigate negative environmental changes.
    Źródło:
    Journal of Water and Land Development; 2023, 59; 291--297
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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