Wszystkie pola: shallow marine - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Holocene evolution of the Pomeranian Bay environment, Southern Baltic Sea
Autorzy:: Kostecki, R.
Janczak-Kostecka, B.
Powiązania:: https://bibliotekanauki.pl/articles/48852.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: aerobic condition
anaerobic condition
Ancylus Lake
Baltic Sea
diatom assemblage
ecological group
geochemistry
Holocene
lacustrine sediment
marine diatom
marine environment
paleogeographic development
Pomeranian Bay
sediment core
shallow lake
Opis:: This article focuses on the diatom assemblages and geochemical composition of sediment cores retrieved from the Pomeranian Bay. We also discuss similarities and differences in the diatom assemblages and the palaeogeographic development of nearby regions. Our main objective was to determine the characteristics and rate of the Littorina transgression in the Pomeranian Bay area. Sediments were divided into units based on differences in the distribution of diatom ecological groups and in geochemical ratios, such as Mg/Ca, Na/K and Fe/Mn. This study identified lacustrine sediments deposited during the time of the Ancylus Lake. This lacustrine-period sedimentation took place in a shallow lake under aerobic conditions. The record of the onset of marine environment dates to 8900–8300 cal BP and corresponds to the Littorina transgression. After about 8300 cal BP, sedimentation took place in a deeper marine environment with higher biogenic production and anaerobic conditions. The abrupt appearance of marine diatom species and increased geochemical salinity indicators reflect the large impact of the Littorina transgression on the Pomeranian Bay environment.
Źródło:: Oceanologia; 2011, 53, (1-TI)
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Nonlinear ship wake waves as a model of rogue waves and a source of danger to the coastal environment: a review
Autorzy:: Soomere, T.
Powiązania:: https://bibliotekanauki.pl/articles/48354.pdf
Data publikacji:: 2006
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Sopot
nonlinear ship
wave
extreme wave
shallow water wave
conference
Baltic Sea
marine ecosystem
coastal environment
ship traffic
speed ship
coastal area
Opis:: A substantial part of the energy of wake waves from high-speed ships sailing in shallow water is concentrated in nonlinear components which at times have a solitonic nature. Recent results of investigations into solitonic wave interactions within the framework of the Kadomtsev-Petviashvili equation and their implications for rogue wave theory are reviewed. A surface elevation four times as high as the counterparts occurs if the properties of the interacting waves are specifically balanced. The slope of the water surface may increase eightfold. The resulting structure may persist for a long time. Nonlinear wake components may exert a considerable influence on the marine ecosystem in coastal areas.
Źródło:: Oceanologia; 2006, 48, S
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki