DOI: 10.1016/j.quascirev.2015.01.018
Scopus记录号: 2-s2.0-84922745544
论文题名: Holocene evolution of the western Greenland Ice Sheet: Assessing geophysical ice-sheet models with geological reconstructions of ice-margin change
作者: Young N.E. ; Briner J.P.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 114 起始页码: 1
结束页码: 17
语种: 英语
英文关键词: 10Be dating
; Greenland Ice Sheet
; Holocene
; Ice-margin reconstructions
; Lake sediments
Scopus关键词: Geology
; Geophysics
; Glaciers
; Repair
; Sea level
; <sup>10</sup>Be dating
; Eustatic sea-level rise
; Greenland Ice Sheet
; Holocene thermal maximums
; Holocenes
; Ice sheet models
; Lake sediments
; Model results
; Ice
; eustacy
; Holocene
; ice margin
; ice retreat
; ice sheet
; lacustrine deposit
; numerical model
; reconstruction
; Arctic
; Greenland
; Greenland Ice Sheet
; Kangerlussuaq Fjord
英文摘要: Geophysical ice-sheet models are used to predict future ice-sheet dimensions and, in turn, these projections help estimate the magnitude of eustatic sea-level rise. Before models can confidently predict ice-sheet behavior, they must be validated by being able to duplicate the geological record of ice-sheet change. Here, we review geological records of Greenland Ice Sheet (GrIS) change, with emphasis on the warmer-than-present middle Holocene, and compare these records to published studies that numerically simulate GrIS behavior through the Holocene. Geological records are concentrated in West and Southwest Greenland, which are also the regions where the GrIS margin likely experienced the greatest distance of inland retreat during the middle Holocene. Several records spanning from Melville Bugt to Jakobshavn Isfjord in western Greenland indicate the GrIS achieved its minimum extent between ~5 and 3ka, and farther south in the Kangerlussuaq region, new data presented here indicate the ice margin reached its minimum extent between ~4.2 and 1.8ka. In the Narsarsuaq region in southern Greenland, the GrIS likely achieved its minimum configuration between ~7 and 4ka. We highlight key similarities and discrepancies between these reconstructions and model results, and finally, we suggest that despite some degree of inland retreat, the West and Southwest GrIS margin remained relatively stable and close to its current position through the Holocene thermal maximum. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59963
Appears in Collections: 过去全球变化的重建
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作者单位: Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; Department of Geology, University at Buffalo, Buffalo, NY, United States
Recommended Citation:
Young N.E.,Briner J.P.. Holocene evolution of the western Greenland Ice Sheet: Assessing geophysical ice-sheet models with geological reconstructions of ice-margin change[J]. Quaternary Science Reviews,2015-01-01,114