globalchange  > 气候减缓与适应
DOI: 10.1073/pnas.1812883116
WOS记录号: WOS:000456336100007
论文题名:
Four decades of Antarctic Ice Sheet mass balance from 1979-2017
作者: Rignot, Eric1,2; Mouginot, Jeremie1,3; Scheuchl, Bernd1; van den Broeke, Michiel4; van Wessem, Melchior J.4; Morlighem, Mathieu1
通讯作者: Rignot, Eric
刊名: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:4, 页码:1095-1103
语种: 英语
英文关键词: glaciology ; Antarctica ; remote sensing ; climate change ; sea-level rise
WOS关键词: CIRCUMPOLAR DEEP-WATER ; AMUNDSEN SEA EMBAYMENT ; EAST ANTARCTICA ; SHELF THICKNESS ; WEST ANTARCTICA ; OUTLET GLACIERS ; VICTORIA-LAND ; FLOW ; PENINSULA ; DYNAMICS
WOS学科分类: Multidisciplinary Sciences
WOS研究方向: Science & Technology - Other Topics
英文摘要:

We use updated drainage inventory, ice thickness, and ice velocity data to calculate the grounding line ice discharge of 176 basins draining the Antarctic Ice Sheet from 1979 to 2017. We compare the results with a surface mass balance model to deduce the ice sheet mass balance. The total mass loss increased from 40 +/- 9 Gt/y in 1979-1990 to 50 +/- 14 Gt/y in 1989-2000, 166 +/- 18 Gt/y in 1999-2009, and 252 +/- 26 Gt/y in 2009-2017. In 2009-2017, the mass loss was dominated by the Amundsen/Bellingshausen Sea sectors, in West Antarctica (159 +/- 8 Gt/y), Wilkes Land, in East Antarctica (51 +/- 13 Gt/y), and West and Northeast Peninsula (42 +/- 5 Gt/y). The contribution to sea-level rise from Antarctica averaged 3.6 +/- 0.5 mm per decade with a cumulative 14.0 +/- 2.0 mm since 1979, including 6.9 +/- 0.6 mm from West Antarctica, 4.4 +/- 0.9 mm from East Antarctica, and 2.5 +/- 0.4 mm from the Peninsula (i.e., East Antarctica is a major participant in the mass loss). During the entire period, the mass loss concentrated in areas closest to warm, salty, subsurface, circumpolar deep water (CDW), that is, consistent with enhanced polar westerlies pushing CDW toward Antarctica to melt its floating ice shelves, destabilize the glaciers, and raise sea level.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/128134
Appears in Collections:气候减缓与适应

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作者单位: 1.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA
2.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
3.Univ Grenoble Alpes, CNRS, Inst Geosci Environm, F-38058 Grenoble, France
4.Univ Utrecht, Inst Marine & Atmospher Res Utrecht, NL-3508 TA Utrecht, Netherlands

Recommended Citation:
Rignot, Eric,Mouginot, Jeremie,Scheuchl, Bernd,et al. Four decades of Antarctic Ice Sheet mass balance from 1979-2017[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019-01-01,116(4):1095-1103
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