IP25 and Uk'37 proxy records from sediment cores from the subarctic Pacific and the Bering Sea ...
This study focusses on the last glacial-deglacial-Holocene spatial and temporal variability in sea-ice cover based on organic geochemical analyses of marine sediment cores from the subarctic Pacific and the Bering Sea. By means of the sea ice proxy "IP25/PIP25" and phytoplankton-derived bi...
Main Authors: | , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA
2018
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Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.887833 https://doi.pangaea.de/10.1594/PANGAEA.887833 |
Summary: | This study focusses on the last glacial-deglacial-Holocene spatial and temporal variability in sea-ice cover based on organic geochemical analyses of marine sediment cores from the subarctic Pacific and the Bering Sea. By means of the sea ice proxy "IP25/PIP25" and phytoplankton-derived biomarkers (specific sterols and alkenones), we reconstruct the spring sea-ice conditions, (summer) sea-surface temperature (SST) and primary productivity, respectively. The large variability of sea ice was explained by a combination of local and global factors, such as solar insolation, global climate anomalies and sea-level changes controlling the oceanographic circulation and water mass exchange between the subarctic Pacific and the Bering Sea. During the Last Glacial Maximum, extensive sea-ice cover prevailed over large part of the subarctic Pacific and the Bering Sea. The following deglaciation is characterized by a rapid sea-ice advance and retreat. During cold periods (Heinrich Stadial 1 and Younger Dryas) seasonal ... : Supplement to: Méheust, Marie; Stein, Ruediger; Fahl, Kirsten; Gersonde, Rainer (2018): Sea-ice variability in the subarctic North Pacific and adjacent Bering Sea during the past 25 ka: new insights from IP25 and Uk′37 proxy records. In: O'Cofaigh, C., Kirchner, N., Federov, G., Noormets, R. and de Vernal, A. (Eds.), Arctic environmental change beyond instrumental records, Special PAST Gateways issue of arktos, arktos - The Journal of Arctic Geosciences, 4(1) ... |
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