DOI: 10.1002/2014GL060800
论文题名: Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent
作者: Carlson A.E. ; Winsor K. ; Ullman D.J. ; Brook E.J. ; Rood D.H. ; Axford Y. ; Legrande A.N. ; Anslow F.S. ; Sinclair G.
刊名: Geophysical Research Letters
ISSN: 0094-9896
EISSN: 1944-9627
出版年: 2014
卷: 41, 期: 15 起始页码: 5514
结束页码: 5521
语种: 英语
英文关键词: cosmogenic dating
; early Holocene climate
; Greenland ice sheet
Scopus关键词: Earth sciences
; Geophysics
; Glaciers
; Cosmogenic dating
; Early Holocene
; Greenland Ice Sheet
; Last deglaciation
; Summer climate
; Summer temperature
; Surface exposure age
; West Greenland
; Late Holocene
; Time-scales
; Glaciers
; Ice
; Holocene
; ice retreat
; ice sheet
; summer
; timescale
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: Early Holocene summer warmth drove dramatic Greenland ice sheet (GIS) retreat. Subsequent insolation-driven cooling caused GIS margin readvance to late Holocene maxima, from which ice margins are now retreating. We use 10Be surface exposure ages from four locations between 69.4°N and 61.2°N to date when in the early Holocene south to west GIS margins retreated to within these late Holocene maximum extents. We find that this occurred at 11.1±0.2 ka to 10.6±0.5 ka in south Greenland, significantly earlier than previous estimates, and 6.8±0.1 ka to 7.9±0.1 ka in southwest to west Greenland, consistent with existing 10Be ages. At least in south Greenland, these 10Be ages likely provide a minimum constraint for when on a multicentury timescale summer temperatures after the last deglaciation warmed above late Holocene temperatures in the early Holocene. Current south Greenland ice margin retreat suggests that south Greenland may have now warmed to or above earliest Holocene summer temperatures. Key Points South Greenland ice retreated within its near-present margins 11.1-10.6 ka South Greenland ice receded inboard of modern extent 3-4 ka earlier than west Current south Greenland summer climate may be similar to that of the early Holocene © 2014. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905295382&doi=10.1002%2f2014GL060800&partnerID=40&md5=f4f7989e8cd4446036b461fe95a42345
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7160
Appears in Collections: 气候减缓与适应
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作者单位: College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Carlson A.E.,Winsor K.,Ullman D.J.,et al. Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent[J]. Geophysical Research Letters,2014-01-01,41(15).