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    Wyświetlanie 1-7 z 7
    Tytuł:
    Last two millennia water level changes of the Młynek Lake (northern Poland) inferred from diatoms and chrysophyte cysts record
    Autorzy:
    Zalat, Abdelfattah
    Welc, Fabian
    Nitychoruk, Jerzy
    Marks, Leszek
    Chodyka, Marta
    Zbucki, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2025243.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Diatoms
    chrysophyte
    environment
    water level
    climate change
    Młynek Lake
    Polska
    Opis:
    A sediment core, 350 cm long recovered from Młynek Lake, northern of Poland (Warmia and Masuria Region) was analyzed with respect to their content of diatoms and chrysophyte cysts. The aim was to reconstruct the lake water level and climatic changes during the past 2500 years. The recognized diatom assemblages displayed marked floristic changes along the sediment core samples. The main change in diatom composition consists of a shift from an assemblage dominated by benthic Fragilaria sensu lato species through marked intervals to a planktonic one in distinct zones. A high proportion of benthic to plankton taxa has been reported as indicative for a lowering of the lake level with long ice cover in a cold dry climate and a shift from benthic to planktonic diatom taxa reflects arising water level with longest growing season and reduced ice cover on the lake during a warm wet climate. Multivariate statistical analysis included hierarchical ascending clustering distinguished four diatom ecological groups. The analyzed core section was divided into 11 diatom zones according to a distribution of ecological groups and variation in abundance of dominant species supported by 14C data. The results displayed a developmental history of the Młynek Lake that can be divided into 6 main phases of alternating warm wet and cold dry shifts. A distinct dominance of planktonic eutrophic indicator diatoms accompanied by a low abundance of chrysophyte cysts indicates increased lake trophicity and a general trend for the increasing anthropogenic impact.
    Źródło:
    Studia Quaternaria; 2018, 35; 77-89
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water relations during two hydrological years in swampy areas in the Siemianice Forest Experimental Station
    Autorzy:
    Krysztofiak, A.T.
    Miler, A.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/62494.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    water relation
    hydrology
    swamp area
    Siemianice Forest Experimental Station
    forest experimental station
    ground water level
    surface water level
    climate change
    Marianka Forest District
    forest environment
    water resource
    water condition
    Opis:
    In recent years researchers have focused increasingly on climatic changes taking place in nature (increasing air temperature, decreasing precipitation totals). These imply changes in components of water balances and in practice changes in water relations both on the global and local scale. At present site overdrying is considered to be the biggest threat [Pierzgalski 2007]. The aim of the study is to present water relations in the forest swampy areas in a forest district (the Marianka Forest District) of the Siemianice Forest Experimental Station in hydrological years of 2005 and 2006. The investigations showed that analysed catchments, despite being located in swampy areas, are characterized by periods of water depletion in ditches. In analysed watercourses runoff was recorded from mid-November 2004 to the beginning of June 2005, while in the next hydrological year it was recorded again from mid-November, but this time longer to mid-June 2006. In relation to ground water of the catchment area a predictable relationship was observed of the water table level at the locations of observation wells. The wells located in the top sections of the catchment had water table the deepest below the ground level, while wells in valleys had water tables at the most shallow levels. It may also be stated that wells situated in higher areas (watershed), are characterized by a slightly bigger variation in the ground water table during the year than it was the case with wells located at lower points (in valleys). Both analyzed hydrological years (2005 and 2006) showed a similar pattern of ground water table at individual sites. Moreover, a marked cyclicity was recorded in the elevation of the water table, i.e. water level rising in autumn and lowering in summer months (as a result of changes in plant transpiration). The relationship of ground water levels with different forest sites found in the analyzed catchments confirms the dependence on the site moisture level variant. Water was lying at the most shallow levels in the ash-alder swamp forest site – a marshy site, while it was markedly the deepest in fresh mixed coniferous forest sites – a fresh site type. When analyzing changes in the ground water levels in terms of stand age classes we may clearly observe the seasonal variation and similar patterns of changes. Water lay the most shallow in stands of age classes V and VI. The level was significantly deepest in age class IV. The above dependencies pertained both to the hydrological year 2005 and 2006.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2008, 06
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigating the recent drought effects on underground water resources in the province of Kurdistan from a quantitative and qualitative point of view (Case study: Dehgolan and Ghorveh plains)
    Autorzy:
    Bashiri, E.
    Bashiri, J.
    Karimi, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/11333.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    drought effect
    underground water
    water resource
    Kurdistan region
    Dehgolan plain
    Ghorveh plain
    climate change
    water level fluctuation
    hydrology
    deposit type
    hydrochemistry
    Opis:
    The Ghorveh plain with an annual average rainfall of 350 millimeter and a cold and semi humid climate is located between the Dehgolan's watersheds and Chahardoli and 95 kilometers east of Sanandaj and northwest of Hamadan. From a geographic coordinates point of view it is situated between the longitudes of 47° 38' 52" to 48° 06' 03" eastern and latitudes of 35° 02' 22" to 35° 30' 54" northern . This plain leads to Mts. Darvazeh and Ebrahim Attar from south, it leads to hillside lands from the northern side , from Westside it reaches Mt. Bikheir and from the eastern part it is limited to the Dam Gaz heights. The area of the Ghorveh watershed is 1063/50 square kilometers while the area of the region under study is 197 square kilometers. Geologically speaking, it is located in the Sanadaj –Sirjan zone. The collision depth to the underground waters in the heights range bordering the plain is a maximum of 42 meters while the same rate about the river Talvar is at least zero and it is less than 5 meters in a wide range region of the eastern side of the plain. The direction of the underground water flow in the Ghorveh region is from the south west to north east. The Piezometrical water level changes compared to the western side plain has had a reduced height.The Dehgolan's plain with an annual average rainfall of 354 millimeters and a cold and semi humid climate is located in the eastern side of the city of Sanandaj between the longitudes of 47° 08' 00" to 48° 12' 00" eastern and latitudes of 35° 00' 00" to 36° 00'00" northern. This plain is limited to not very high ridge of Shanooreh from the eastern side and it leads to the Darband Kabood heights and Abdulrahman heights from south, while it leads to Mt. Sheida and Akhikamal and Salarabad from north and then it is limited to the Khatoon heights from the west part . The area of the watershed of Dehgolan is 2250 square kilometer and the area of the region under study is 644 square kilometers . Geologically and regionally speaking, it is part of the geological – structural zone of Sanandaj – Sirjan. The general slope of the region is towards east and north east. The main river of this plain is called Talvar. The alluvial aquifer of the Dehgolan's plain is of a free type and is on average 90meters thick where in some parts thickness swells to 90 meters.
    Źródło:
    International Letters of Natural Sciences; 2013, 03
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Long term water level and surface temperature changes in the lagoons of the Southern and Eastern Baltic
    Autorzy:
    Dailidiene, I.
    Baudler, H.
    Chubarenko, B.
    Navrotskaya, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/47846.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    climate change
    coastal lagoon
    Curonian Lagoon
    erosion
    lagoon
    linear regression
    long-term variation
    sea surface temperature
    variability
    Vistula Lagoon
    water level
    Źródło:
    Oceanologia; 2011, 53, (1-TI)
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of wind climate changes on the mean sea level and current regime in the coastal waters of West Estonia, Baltic Sea
    Autorzy:
    Suursaar, U.
    Kullas, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/48975.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    hydrodynamic model
    coastal water
    sea level
    Baltic Sea
    Estonia
    climate change
    wind
    Opis:
    The response of semi-realistic wind speed increase scenarios to the mean sea level and current regime of semi-enclosed sub-basins in the Baltic Sea is studied with a 2D hydrodynamic model. According to the model output of spatial mean sea levels, an increase in the westerly wind component by 2 m s−1 leads, for example, to a mean sea level rise of up to 3 cm in windward locations in the study area. The sea level change patterns depend on the wind scenario and coastline configuration. The increases in wind speed considered here also lead to enhanced water exchange through the straits, strengthening of the basin-scale circulation, enhancement of up- and downwelling, and increased bottom stresses near coasts.
    Źródło:
    Oceanologia; 2006, 48, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biodiversity of the Arctic Ocean in the face of climate change
    Autorzy:
    Weslawski, J.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/11979.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biodiversity
    Arctic Ocean
    climate change
    global climate change
    Arctic sea
    aquatic ecosystem
    Arctic environment
    sea water
    water temperature
    salinity level
    Opis:
    Global climate changes which has been observed over the recent years affects organisms occurring in the Arctic seas and the functioning of the whole maritime ecosystems there. The research note presents and briefly analyses the biological diversity of the Arctic Ocean and the most important factors which change the relations between organisms and the environment in the Arctic.
    Źródło:
    Papers on Global Change; 2011, 18
    2300-8121
    1730-802X
    Pojawia się w:
    Papers on Global Change
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Future sea level change: a transboundary problem in the baltic sea region? - seareg case study area Gdańsk
    Autorzy:
    Staudt, M.
    Kordalski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1185874.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    podnoszenie się poziomu morza
    zmiany klimatu
    modelowanie klimatu
    zaopatrzenie w wodę
    GIS
    planowanie przestrzenne
    region gdański
    Morze Bałtyckie
    sea level rise
    climate change
    climate modelling
    water supply
    spatial planning
    Gdańsk region
    Baltic Sea
    Opis:
    Projekt "Sea Level Change Affecting the Spatial Development of the Baltic Sea Region" SEAREG, unijnego programu Interreg IIIB porusza społeczno-ekonomiczne i środowiskowe skutki zmian klimatu w regionie Morza Bałtyckiego (BSR), w szczególności związane z podnoszeniem się poziomu morza oraz zmianami odpływu z sieci rzecznej. Te dwa czynniki mogą prowadzić do wystąpienia katastrofalnych w skutkach powodzi, wpływających bezpośrednio na zagospodarowanie przestrzenne miast, jak również na zrównoważony rozwój całego regionu Morza Bałtyckiego. Jednym z miejsc objętych szczegółowym rozpoznaniem w ramach projektu był Gdańsk. W obrębie miasta na nisko położonych obszarach tarasu nadmorskiego i Żuław Wiślanych zlokalizowane są ujęcia wód podziemnych, ważne dla zaopatrzenia w wodę do picia i na potrzeby gospodarcze. Dla Gdańska strefy zagrożone powodzią i podtopieniami zostały wyznaczone przy pomocy oprogramowania GIS, z wykorzystaniem wysoko rozdzielczych regionalnych modeli oceanograficznych, modeli powierzchni terenu i planów zagospodarowania przestrzennego. Opracowano 3 scenariusze, według których poziom morza w ciągu następnych 100 lat wzrośnie w rejonie Gdańska odpowiednio o 0,03, 0,48 i 0,97 m.
    Źródło:
    Polish Geological Institute Special Papers; 2005, 18; 86-92
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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