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Wyświetlanie 1-3 z 3
Tytuł:
Review and reinterpretation of the pollen and diatom data from the deposits of the Southern Baltic lagoons
Autorzy:
Miotk-Szpiganowicz, G.
Zachowicz, J.
Uścinowicz, Sz.
Powiązania:
https://bibliotekanauki.pl/articles/1205002.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
pollen and diatom analyses
lagoons
sea-level changes
Baltic Sea
Opis:
According to their origin, geomorphology and hydrology, the fresh/brackish-water bays and coastal lakes of the Southern Baltic coast can be treated as lagoons. They developed at the time of and as a result of the Atlantic (Litorina) transgression of the Southern Baltica. There are many publications about the origin and evolution of the lagoons and lakes along the Polish coast of the Southern Baltic (e.g. Przybyłowska-Lange, 1973a, b, 1974, 1979, 1981; Zaborowska, 1977; Zachowicz, 1977, 1985; Wypych, 1980a, b; Zachowicz et al., 1982; Bogaczewicz-Adamczak, Miotk, 1985a, b; Dąbrowski et al., 1985; Zachowicz, Zaborowska, 1985; Borówka et al., 2001a, b, 2002). Nevertheless, the origin of the lagoons has not been fully explained. In the light of present-day information the results of earliest investigations often need to be reinterpreted. The aim of this work was the correlation of the published and unpublished pollen and diatom diagrams from Late Pleistocene and Holocene sediments of the Southern Baltic lagoons, and their relation with radiocarbon dating. The pollen and diatom diagrams from the area of north-east Germany and the Curonian Lagoon (Kabailiene., 1999; Jahns, 2000; Kaiser et al., 2000; Endtmann, 2002; Bitinas et al., 2002) have been used for comparison. For the palynological sites, the local pollen assemblage zones (L PAZ) have been identified according to Janczyk-Kopikowa (1987). Comparison of the biostratigraphical data allowed us to define the approach time of the formation of the lagoons in their present-day position on the coast as well as to determine the periods of an accelerated sea-level rise and increased frequency of storm surges (so-called marine transgression phases) when the investigated areas had been under the direct influence of the sea. Such influences are visible about 7000, 6000, 5000 and 4000 years BP. This period of marine influences, about 1000-year long, corresponds very well to the same period of climate oscillations mentioned by Stuiver and Braziunas (1993), Stuiver et al. (1995) and Chapman and Shackelton (2000). The influence of the sea in the Post-Litorina period was associated mainly with the inflow of sea water through more or less developed barriers, so they are not synchronous.
Źródło:
Polish Geological Institute Special Papers; 2008, 23; 45-70
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changing sea level at sinking coasts - competition between climate change and geological processes
Autorzy:
Harff, J.
Meyer, M.
Powiązania:
https://bibliotekanauki.pl/articles/1204999.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
seal level
coastline changes
modeling and future scenarios
Baltic Sea
Opis:
Changes of coastlines have economic and social impact on the human population concentrated in coastal areas. The investigation of coastal change processes becomes important particularly at sinking-retreating-coast for future planning, and the derivation of scenarios must be based on the understanding of the driving processes. It is well known that coastal change is a complex result of an interaction of climate driven eustatic sea level change and vertical crustal movements. An index is given that allows to distinguish between coasts controlled by glacio-isostatic processes and those determined by the climatic forces of coastal morphogenesis. A simple model allows reconstructions of the palaeo-geographic history of sinking coasts. Prognostic scenarios of coastal change are possible by applying of parameterized vertical crustal movement data and sea level change data derived from climate modeling. These data have to be superimposed with the influence of storm events. The coupling of processes on different time scales between hours and millennia are questions under investigation.
Źródło:
Polish Geological Institute Special Papers; 2008, 23; 39-44
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Storm surges versus shore erosion: 21 years (2000–2020) of observations on the Świna Gate Sandbar (southern Baltic coast)
Autorzy:
Łabuz, Tomasz Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/15805040.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
storm surge
sea level
run-up
dune erosion
beach erosion
sand volume changes
Baltic Sea
Opis:
Based on observations spanning 21 years (2000–2020), the article studies the effects of storm surges on the shore of the Świna Gate Sandbar in the southern part of the Pomeranian Bay (southern Baltic Sea). Impacts of selected maximum storm surges in each year were assessed with respect to morphological data collected on the beach and the foredune. The data included parameters of beach-dune erosion as measured along a beach transect before and after each surge. Differences and trends in the shore erosion were related to the sea level (SL), duration of a storm surge [highest storm sea level (HSL) > 1 m], wind-wave sector and wave run-up. The relationships were explored using a sim- ple correlation analysis. The most serious erosion was observed during the heaviest surges [HSL > 1.3 m above the mean sea level (AMSL)], with a wave run-up higher than 3.2 m AMSL. Such surges occurred at about 2-year intervals. The average SL during a surge was 1.2 m AMSL, with a run-up of 2.6 m AMSL. The beach and the lower part of the shore, below that level, were eroded each year. The heaviest surges resulted in an average 5.2 m and 7.0 m dune retreat on the high-beach-accumulative shore and on the low-beach-erosive shore, respectively. The dune was not eroded when the beach height exceeded the wave run-up. The heaviest surges eroded away 12–14 m3 of the beach sand volume. The shore erosion was found to be related to the storm surge duration, the maximum SL, the run-up and the beach height prior to the surge.
Źródło:
Quaestiones Geographicae; 2022, 41, 3; 5-31
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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