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Repeated Pleistocene glaciation of the East Siberian continental margin

Cited 49 time in scopus
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Title
Repeated Pleistocene glaciation of the East Siberian continental margin
Authors
Niessen, Frank
Hong, Jong Kuk
Hegewald, Anne
Matthiessen, Jens
Stein, Rudiger
Kim, Hyoungjun
Kim, Sookwan
Jensen, Laura
Jokat, Wilfried
Nam, Seung-Il
Kang, Sung-Ho
Subject
Geology
Keywords
Pleistocebe glaciation; Bathymetric map; Ice sheet; Streamline glacial lineations; East Siberian Continental margin; Araon
Issue Date
2013
Citation
Niessen, Frank, et al. 2013. "Repeated Pleistocene glaciation of the East Siberian continental margin". Nature Geoscience, 6: 842-846.
Abstract
During the Pleistocene glaciations, Arctic ice sheets onwestern Eurasia, Greenland and North America terminated at their continental margins1-4. In contrast, the exposed continental shelves in the Beringian region of Siberia are thought to have been covered by a tundra landscape5-7. Evidence of grounded ice on seafloor ridges and plateaux off the coast of the Beringian margin, at depths of up to 1,000 m, have generally been attributed to ice shelves or giant icebergs that spread oceanwards during glacial maxima8-12. Here we identify marine glaciogenic landforms visible in seismic profiles and detailed bathymetric maps along the East Siberian continental margin. We interpret these features, which occur in present water depths of up to 1,200 m, as traces from grounding events of ice sheets and ice shelves. We conclude that the Siberian Shelf edge and parts of the Arctic Ocean were covered by ice sheets of about 1 km in thickness during several Pleistocene glaciations before the most recent glacial period, which must have had a significant influence on albedo and oceanic and atmospheric circulation.
DOI
http://dx.doi.org/10.1038/ngeo1904
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