DOI: 10.5194/cp-9-1773-2013
Scopus记录号: 2-s2.0-84881398979
论文题名: Coupled regional climate-ice-sheet simulation shows limited Greenland ice loss during the Eemian
作者: Helsen M.M. ; Van De Berg W.J. ; Van De Wal R.S.W. ; Van Den Broeke M.R. ; Oerlemans J.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2013
卷: 9, 期: 4 起始页码: 1773
结束页码: 1788
语种: 英语
Scopus关键词: climate conditions
; climate forcing
; climate modeling
; Eemian
; elevation
; glacier retreat
; glacioeustacy
; ice cover
; ice movement
; ice sheet
; Last Interglacial
; reconstruction
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: During the last interglacial period (Eemian, 130-115 kyr BP) eustatic global sea level likely peaked at > 6 m above the present-day level, but estimates of the contribution of the Greenland Ice Sheet vary widely. Here we use an asynchronously two-way-coupled regional climate-ice-sheet model, which includes physically realistic feedbacks between the changing ice sheet topography and climate forcing. Our simulation results in a contribution from the Greenland Ice Sheet to the Eemian sea level highstand between 1.2 and 3.5 m, with a most likely value of 2.1 m. Simulated Eemian ice loss in Greenland is dominated by the rapid retreat of the southwestern margin; two-thirds of the ice loss occurred south of 70 N. The southern dome survived the Eemian and remained connected to the central dome. Large-scale ice sheet retreat is prevented in areas with high accumulation. Our results broadly agree with ice-core-inferred elevation changes and marine records, but it does not match with the ice-core-derived temperature record from northern Greenland. During maximum Eemian summertime insolation, Greenland mass loss contributed ∼ 0.5 m kyr-1 to sea level rise, 24% of the reconstructed total rate of sea level rise. Next to that, a difference of > 3 m remains between our maximum estimate of the Greenland contribution and the reconstructed minimum value of the global eustatic Eemian highstand. Hence, the Antarctic Ice Sheet must also have contributed significantly to this sea level highstand. © Author(s) 2013. CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49411
Appears in Collections: 气候变化与战略
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Recommended Citation:
Helsen M.M.,Van De Berg W.J.,Van De Wal R.S.W.,et al. Coupled regional climate-ice-sheet simulation shows limited Greenland ice loss during the Eemian[J]. Climate of the Past,2013-01-01,9(4)