DOI: 10.1002/2015GL065701
论文题名: Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013
作者: Li X. ; Rignot E. ; Morlighem M. ; Mouginot J. ; Scheuchl B.
刊名: Geophysical Research Letters
ISSN: 0094-8538
EISSN: 1944-8269
出版年: 2015
卷: 42, 期: 19 起始页码: 8049
结束页码: 8056
语种: 英语
英文关键词: Antarctica
; glaciology
; grounding line
; radar interferometry
; radar sounding
; remote sensing
Scopus关键词: Interferometry
; NASA
; Radar
; Remote sensing
; Sea level
; Synthetic aperture radar
; Antarctica
; Glaciology
; Grounding line
; Radar interferometry
; Radar soundings
; Ice
; glacier retreat
; glaciology
; grounding line
; precision
; radar interferometry
; remote sensing
; sea level change
; spatiotemporal analysis
; synthetic aperture radar
; topography
; Antarctica
; East Antarctica
; Totten Glacier
; West Antarctica
英文摘要: Totten Glacier, East Antarctica, a glacier that holds a 3.9 m sea level change equivalent, has thinned and lost mass for decades. We map its grounding line positions in 1996 and 2013 using differential radar interferometry (InSAR) data and develop precise, high-resolution topographies of its ice surface and ice draft using NASA Operation IceBridge data, InSAR data, and a mass conservation method. We detect a 1 to 3 km retreat of the grounding line in 17 years. The retreat is asymmetrical along a two-lobe pattern, where ice is only grounded a few 10 m above sea level, or ice plain, which may unground further with only modest amounts of ice thinning. The pattern of retreat indicates ice thinning of 12 m in 17 years or 0.7±0.1 m/yr at the grounding line on average. Sustained thinning will cause further grounding line retreat but may not be conducive to a marine instability. Key Points Grounding line of Totten Glacier is retreating, not as fast as West Antarctica Retreat pattern explained by the newly inferred bed geometry If ice thinning maintains, bed geometry conducive to further retreat © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84947039894&doi=10.1002%2f2015GL065701&partnerID=40&md5=1ad4d42265581b5b822492a2d4ba437f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8154
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 System Science, University of California, Irvine, CA, United States
Recommended Citation:
Li X.,Rignot E.,Morlighem M.,et al. Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013[J]. Geophysical Research Letters,2015-01-01,42(19).