DOI: 10.1038/ngeo1904
论文题名: Repeated Pleistocene glaciation of the East Siberian continental margin
作者: Niessen F. ; Hong J.K. ; Hegewald A. ; Matthiessen J. ; Stein R. ; Kim H. ; Kim S. ; Jensen L. ; Jokat W. ; Nam S.-I. ; Kang S.-H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 10 起始页码: 842
结束页码: 846
语种: 英语
Scopus关键词: albedo
; atmospheric circulation
; continental margin
; continental shelf
; glaciation
; glacier dynamics
; ice mechanics
; ice sheet
; ice thickness
; iceberg
; Pleistocene
; tundra
; water depth
; Siberia
英文摘要: During the Pleistocene glaciations, Arctic ice sheets on western Eurasia, Greenland and North America terminated at their continental margins. In contrast, the exposed continental shelves in the Beringian region of Siberia are thought to have been covered by a tundra landscape. 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 maxima. 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. © 2013 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106686
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), Am Alten Hafen 26, 27568 Bremerhaven, Germany; Korea Polar Research Institute (KOPRI), 26 Songdomirae-ro, Yeonsoo-gu, Incheon 406-840, South Korea; University of Science and Technology, 217 Gajung-ro, Yuseong-gu, Daejeon, South Korea
Recommended Citation:
Niessen F.,Hong J.K.,Hegewald A.,et al. Repeated Pleistocene glaciation of the East Siberian continental margin[J]. Nature Geoscience,2013-01-01,6(10)