globalchange  > 气候减缓与适应
DOI: 10.1002/grl.50689
论文题名:
Three-dimensional mapping by CryoSat-2 of subglacial lake volume changes
作者: McMillan M.; Corr H.; Shepherd A.; Ridout A.; Laxon S.; Cullen R.
刊名: Geophysical Research Letters
ISSN: 0094-8644
EISSN: 1944-8375
出版年: 2013
卷: 40, 期:16
起始页码: 4321
结束页码: 4327
语种: 英语
英文关键词: Antarctica ; CryoSat-2 ; ICESat ; radar altimetry ; SARin ; subglacial lake
Scopus关键词: Antarctica ; CryoSat-2 ; ICESat ; Radar altimetry ; SARin ; Subglacial lakes ; Aneroid altimeters ; Glaciers ; Interferometry ; Lakes ; Ice ; CryoSat-2 ; data set ; glacial lake ; ice sheet ; meltwater ; radar ; satellite altimetry ; three-dimensional modeling ; volume ; Antarctica
英文摘要: We analyze data acquired by the CryoSat-2 interferometric radar altimeter and demonstrate its novel capability to track topographic features on the Antarctic Ice Sheet. We map the perimeter and depth of a 260 km2 surface depression above an Antarctic subglacial lake (SGL) and, in combination with Ice, Cloud and land Elevation Satellite laser altimetry, chart decadal changes in SGL volume. During 2007-2008, between 4.9 and 6.4 km3 of water drained from the SGL, and peak discharge exceeded 160 m3 s -1. The flood was twice as large as any previously recorded and equivalent to ~ 10% of the meltwater generated annually beneath the ice sheet. The ice surface has since uplifted at a rate of 5.6 ± 2.8 m yr -1. Our study demonstrates the ability of CryoSat-2 to provide detailed maps of ice sheet topography, its potential to accurately measure SGL drainage events, and the contribution it can make to understanding water flow beneath Antarctica. Key Points Assessment of novel CryoSat-2 interferometric altimetry over land ice Demonstration of interferometric capability to track off-nadir topography Mapping of largest Antarctic subglacial lake drainage event observed to date. © 2013. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883092643&doi=10.1002%2fgrl.50689&partnerID=40&md5=8631cd84322d7dacd3ed7e56b7da3ec4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5908
Appears in Collections:气候减缓与适应

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作者单位: School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom

Recommended Citation:
McMillan M.,Corr H.,Shepherd A.,et al. Three-dimensional mapping by CryoSat-2 of subglacial lake volume changes[J]. Geophysical Research Letters,2013-01-01,40(16).
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