DOI: 10.1002/2016GL070500
论文题名: Sensitivity of Pine Island Glacier to observed ocean forcing
作者: Christianson K. ; Bushuk M. ; Dutrieux P. ; Parizek B.R. ; Joughin I.R. ; Alley R.B. ; Shean D.E. ; Abrahamsen E.P. ; Anandakrishnan S. ; Heywood K.J. ; Kim T.-W. ; Lee S.H. ; Nicholls K. ; Stanton T. ; Truffer M. ; Webber B.G.M. ; Jenkins A. ; Jacobs S. ; Bindschadler R. ; Holland D.M.
刊名: Geophysical Research Letters
ISSN: 0094-8484
EISSN: 1944-8215
出版年: 2016
卷: 43, 期: 20 起始页码: 10817
结束页码: 10825
语种: 英语
英文关键词: glacier-ocean interactions
; ice dynamics
; ice shelves
; ice streams
; marine ice sheet instability
Scopus关键词: Glaciers
; Oceanography
; Ice dynamics
; Ice sheet
; Ice shelves
; Ice streams
; Long-term effects
; Ocean heat content
; Ocean temperature
; Pine island glaciers
; Ice
英文摘要: We present subannual observations (2009–2014) of a major West Antarctic glacier (Pine Island Glacier) and the neighboring ocean. Ongoing glacier retreat and accelerated ice flow were likely triggered a few decades ago by increased ocean-induced thinning, which may have initiated marine ice sheet instability. Following a subsequent 60% drop in ocean heat content from early 2012 to late 2013, ice flow slowed, but by < 4%, with flow recovering as the ocean warmed to prior temperatures. During this cold-ocean period, the evolving glacier-bed/ice shelf system was also in a geometry favorable to stabilization. However, despite a minor, temporary decrease in ice discharge, the basin-wide thinning signal did not change. Thus, as predicted by theory, once marine ice sheet instability is underway, a single transient high-amplitude ocean cooling has only a relatively minor effect on ice flow. The long-term effects of ocean temperature variability on ice flow, however, are not yet known. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995618138&doi=10.1002%2f2016GL070500&partnerID=40&md5=f619b2edc59fa56f60a70827a59fe52d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9447
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States
Recommended Citation:
Christianson K.,Bushuk M.,Dutrieux P.,et al. Sensitivity of Pine Island Glacier to observed ocean forcing[J]. Geophysical Research Letters,2016-01-01,43(20).