DOI: 10.1016/j.quascirev.2014.05.010
Scopus记录号: 2-s2.0-84903767322
论文题名: Glacial retreat in the Amundsen Sea sector, West Antarctica - first cosmogenic evidence from central Pine Island Bay and the Kohler Range
作者: Lindow J. ; Castex M. ; Wittmann H. ; Johnson J.S. ; Lisker F. ; Gohl K. ; Spiegel C.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 98 起始页码: 166
结束页码: 173
语种: 英语
英文关键词: Amundsen Sea Embayment
; Cosmogenic isotopes
; Deglaciation history
; Glacial retreat
; Holocene
; Kohler Range
; Pine Island Bay
; Surface exposure dating
; West Antarctic Ice Sheet
Scopus关键词: Glacial geology
; Glaciers
; Isotopes
; Landforms
; Submarine geology
; Amundsen Sea
; Cosmogenic isotopes
; Deglaciations
; Glacial retreat
; Holocenes
; Kohler Range
; Pine Island Bay
; Surface exposure dating
; West antarctic ice sheets
; Ice
; deglaciation
; glacier retreat
; grounding line
; Holocene
; ice sheet
; ice shelf
; ice stream
; Last Glacial Maximum
; nunatak
; sediment core
; Amundsen Sea
; Antarctica
; Kohler Range
; Marie Byrd Land
; Pine Island Bay
; Southern Ocean
; West Antarctica
英文摘要: The Amundsen Sea Embayment of West Antarctica hosts one of the most rapidly changing sectors of the West Antarctic Ice Sheet. With the fastest-flowing ice streams in Antarctica, the region around Pine Island Bay is characterized by rapid ice-sheet thinning and grounding-line retreat. Published surface-exposure data are limited to a few isolated nunataks making it difficult to assess the long-term deglacial history of the area. To address this, we correlate existing records of lateral ice-stream retreat from marine sediment cores with onshore glacial thinning in two key areas of eastern Marie Byrd Land: the Kohler Range and Pine Island Bay. Our 10Be surface-exposure ages are the first from the isolated Kohler Range and show that the nunataks there became ice-free between 8.6 and 12.6ka. This implies a minimum long-term average thinning rate of 3.3±0.3cm/yr, which is one order of magnitude lower than recent rates based on satellite data. We also present pre- to early Holocene 10Be surface-exposure ages from two islands located approximately 80km downstream of the Pine Island Glacier ice-shelf front to constrain the lateral deglacial history in the Pine Island Bay area. This study provides insight into the significance of local ice sheet variations and suggests that the post-LGM history in the Amundsen Sea sector was characterized by glacial thinning as well as lateral retreat in pre- to early Holocene times. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60203
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geosciences, University of Bremen, Bremen, Germany; Helmholtz-Centre Potsdam - German Research Centre for Geosciences (GFZ), Potsdam, Germany; British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, United Kingdom; Alfred Wegener Institute, Helmholtz-Centre for Polar and Marine Research (AWI), Bremerhaven, Germany
Recommended Citation:
Lindow J.,Castex M.,Wittmann H.,et al. Glacial retreat in the Amundsen Sea sector, West Antarctica - first cosmogenic evidence from central Pine Island Bay and the Kohler Range[J]. Quaternary Science Reviews,2014-01-01,98