DOI: 10.1016/j.quascirev.2017.12.016
Scopus记录号: 2-s2.0-85044648150
论文题名: Changes in sea ice cover and ice sheet extent at the Yermak Plateau during the last 160 ka – Reconstructions from biomarker records
作者: Kremer A. ; Stein R. ; Fahl K. ; Ji Z. ; Yang Z. ; Wiers S. ; Matthiessen J. ; Forwick M. ; Löwemark L. ; O'Regan M. ; Chen J. ; Snowball I.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 182 起始页码: 93
结束页码: 108
语种: 英语
Scopus关键词: Biomarkers
; Climate change
; Geochronology
; Glacial geology
; Glaciers
; Oceanography
; Organic carbon
; Phytoplankton
; Surface waters
; Biomarker records
; Environmental change
; Interglacials
; Northern Barents Sea
; Sea surface temperature (SST)
; Sea-ice cover
; Temporal variability
; Yermak plateaux
; Sea ice
; biomarker
; climate change
; deglaciation
; glacial-interglacial cycle
; ice cover
; ice sheet
; interglacial
; organic carbon
; phytoplankton
; polynya
; proxy climate record
; reconstruction
; sea ice
; sea surface temperature
; temporal variation
; Arctic
; Arctic Ocean
; Barents Sea
; Svalbard
; Svalbard and Jan Mayen
; Yermak Plateau
英文摘要: The Yermak Plateau is located north of Svalbard at the entrance to the Arctic Ocean, i.e. in an area highly sensitive to climate change. A multi proxy approach was carried out on Core PS92/039-2 to study glacial-interglacial environmental changes at the northern Barents Sea margin during the last 160 ka. The main emphasis was on the reconstruction of sea ice cover, based on the sea ice proxy IP25 and the related phytoplankton - sea ice index PIP25. Sea ice was present most of the time but showed significant temporal variability decisively affected by movements of the Svalbard Barents Sea Ice Sheet. For the first time, we prove the occurrence of seasonal sea ice at the eastern Yermak Plateau during glacial intervals, probably steered by a major northward advance of the ice sheet and the formation of a coastal polynya in front of it. Maximum accumulation of terrigenous organic carbon, IP25 and the phytoplankton biomarkers (brassicasterol, dinosterol, HBI III) can be correlated to distinct deglaciation events. More severe, but variable sea ice cover prevailed at the Yermak Plateau during interglacials. The general proximity to the sea ice margin is further indicated by biomarker (GDGT) - based sea surface temperatures below 2.5 °C. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112309
Appears in Collections: 气候减缓与适应
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作者单位: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Germany; Second Institute of Oceanography, State Oceanic Administration, China; Uppsala University, Sweden; UiT The Arctic University of Norway, Norway; Stockholm University, Sweden
Recommended Citation:
Kremer A.,Stein R.,Fahl K.,et al. Changes in sea ice cover and ice sheet extent at the Yermak Plateau during the last 160 ka – Reconstructions from biomarker records[J]. Quaternary Science Reviews,2018-01-01,182