DOI: 10.1002/grl.50797
论文题名: Initiation of the West Antarctic Ice Sheet and estimates of total Antarctic ice volume in the earliest Oligocene
作者: Wilson D.S. ; Pollard D. ; Deconto R.M. ; Jamieson S.S.R. ; Luyendyk B.P.
刊名: Geophysical Research Letters
ISSN: 0094-8678
EISSN: 1944-8409
出版年: 2013
卷: 40, 期: 16 起始页码: 4305
结束页码: 4309
语种: 英语
英文关键词: Antarctic
; ice sheet
; Oligocene
Scopus关键词: Antarctic
; Climate-ice sheet models
; Eocene-oligocene boundary
; Glacial erosion
; Ice sheet
; Oligocene
; Paleotopography
; West antarctic ice sheets
; Ice
; Glaciers
; deep sea
; Eocene-Oligocene boundary
; estimation method
; glacial erosion
; ice sheet
; paleotopography
; reconstruction
; volume
; Antarctica
; West Antarctica
英文摘要: Reconstructions of Antarctic paleotopography for the late Eocene suggest that glacial erosion and thermal subsidence have lowered West Antarctic elevations considerably since then, with Antarctic land area having decreased ~20%. A new climate-ice sheet model based on these reconstructions shows that the West Antarctic Ice Sheet first formed at the Eocene-Oligocene transition (33.8-33.5 Ma, E-O) in concert with the continental-scale expansion of the East Antarctica Ice Sheet and that the total volume of East and West Antarctic ice (33.4-35.9 × 106 km3) was >1.4 times greater than previously assumed. This larger modeled ice volume is consistent with a modest cooling of 1-2°C in the deep ocean during the E-O transition, lower than other estimates of ~3°C cooling, and suggests the possibility of substantial ice in the Antarctic interior before the Eocene-Oligocene boundary. Key Points Reconstructed topography allows early formation of West Antarctic Ice Sheet Modeled earliest Oligocene Antarctic ice has volume 1.3-1.4 times present ice. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883093481&doi=10.1002%2fgrl.50797&partnerID=40&md5=44803148ca952352926398f575da1468
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5942
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth Science, Marine Science Institute, University of California, Santa Barbara, CA 93106-9630, United States
Recommended Citation:
Wilson D.S.,Pollard D.,Deconto R.M.,et al. Initiation of the West Antarctic Ice Sheet and estimates of total Antarctic ice volume in the earliest Oligocene[J]. Geophysical Research Letters,2013-01-01,40(16).