Biomarker data of sediment core ARA04C/37, Beaufort Sea, Arctic Ocean ...

A biomarker approach is applied on a well-dated core from the Beaufort Sea directly off the Mackenzie River to reconstruct changes in sea ice, sea surface temperature (SST), primary productivity, and terrigenous input. High-resolution records indicate that the southern Beaufort Sea was nearly ice-fr...

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Bibliographic Details
Main Authors: Wu, Junjie, Stein, Ruediger, Fahl, Kirsten, Syring, Nicole, Nam, Seung-Il, Hefter, Jens, Mollenhauer, Gesine, Geibert, Walter
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2020
Subjects:
Arctic Ocean
Beaufort Sea
GDGT
IP25
Sea ice
Sterols
Arctic
Mackenzie River
Climate change
Ice Sheet
Mackenzie river
Online Access:https://dx.doi.org/10.1594/pangaea.915048
https://doi.pangaea.de/10.1594/PANGAEA.915048
Description
Summary:A biomarker approach is applied on a well-dated core from the Beaufort Sea directly off the Mackenzie River to reconstruct changes in sea ice, sea surface temperature (SST), primary productivity, and terrigenous input. High-resolution records indicate that the southern Beaufort Sea was nearly ice-free in summer during the last deglaciation and early Holocene, and a seasonal sea-ice cover developed during the mid-late Holocene, coinciding with a drop in terrigenous sediment flux and primary production. Superimposed to this climate-driven long-term change in surface-water characteristics, we document two major flood events during the deglacial to Holocene transition. Such major flood events in the Beaufort Sea region may have profound effect on global climate change, especially during times when the massive Laurentide Ice Sheet (LIS) collapsed, and huge amount of freshwater was drained into the Beaufort Sea. This freshening of the Arctic Ocean may have resulted in increased freshwater export into the North ...

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