气候变化领域集成服务门户(CCPortal): Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry

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DOI	10.5194/tc-13-427-2019
	Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry
	Schröder L.; Horwath M.; Dietrich R.; Helm V.; Van Den Broeke M.R.; Ligtenberg S.R.M.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	427
结束页码	449
卷号	13 期号:2
英文摘要	We developed a multi-mission satellite altimetry analysis over the Antarctic Ice Sheet which comprises Seasat, Geosat, ERS-1, ERS-2, Envisat, ICESat and CryoSat-2. After a consistent reprocessing and a stepwise calibration of the inter-mission offsets, we obtained monthly grids of multi-mission surface elevation change (SEC) with respect to the reference epoch 09/2010 (in the format of month/year) from 1978 to 2017. A validation with independent elevation changes from in situ and airborne observations as well as a comparison with a firn model proves that the different missions and observation modes have been successfully combined to a seamless multi-mission time series. For coastal East Antarctica, even Seasat and Geosat provide reliable information and, hence, allow for the analysis of four decades of elevation changes. The spatial and temporal resolution of our result allows for the identification of when and where significant changes in elevation occurred. These time series add detailed information to the evolution of surface elevation in such key regions as Pine Island Glacier, Totten Glacier, Dronning Maud Land or Lake Vostok. After applying a density mask, we calculated time series of mass changes and found that the Antarctic Ice Sheet north of 81.5° S was losing mass at an average rate of-85±16 Gt yr -1 between 1992 and 2017, which accelerated to-137±25 Gt yr -1 after 2010. © 2019 Author(s).
学科领域	coastal zone; CryoSat; elevation; Envisat; ERS; Geosat; ICESat; satellite altimetry; satellite mission; Seasat; Antarctic Ice Sheet; Antarctica; Antarctica; East Antarctica; Lake Vostok; Pine Island Glacier; Queen Maud Land; Totten Glacier; West Antarctica
语种	英语
scopus关键词	coastal zone; CryoSat; elevation; Envisat; ERS; Geosat; ICESat; satellite altimetry; satellite mission; Seasat; Antarctic Ice Sheet; Antarctica; Antarctica; East Antarctica; Lake Vostok; Pine Island Glacier; Queen Maud Land; Totten Glacier; West Antarctica
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118934
作者单位	Technische Universität Dresden, Institut fur Planetare Geodäsie, Dresden, Germany; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, Netherlands
推荐引用方式 GB/T 7714	Schröder L.,Horwath M.,Dietrich R.,et al. Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry[J],2019,13(2).
APA	Schröder L.,Horwath M.,Dietrich R.,Helm V.,Van Den Broeke M.R.,&Ligtenberg S.R.M..(2019).Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry.The Cryosphere,13(2).
MLA	Schröder L.,et al."Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry".The Cryosphere 13.2(2019).