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题名: Re-estimation of glacier mass loss in Greenland from GRACE with correction of land-ocean leakage effects
作者: Jin, Shuanggen1, 2; Zou, Fang1, 3
刊名: GLOBAL AND PLANETARY CHANGE
出版日期: 2015-12-01
卷号: 135, 页码:170-178
关键词: Leakage effects ; Glacier melting ; Greenland ; GRACE ; ICESat
DOI: 10.1016/j.gloplacha.2015.11.002
文章类型: Article
英文摘要: The Gravity Recovery and Climate Experiment (GRACE) satellites can estimate the high-precision time-varying gravity field and the changes of Earth's surface mass, which have been widely used in water cycle and glacier mass balance. However, one of larger errors in GRACE measurements, land-ocean leakage effects, restricts high precision retrieval of ocean mass and terrestrial water storage variations along the coasts, particularly estimation of mass loss in Greenland. The land-ocean leakage effect along the coasts in Greenland will contaminate the mass loss signals with significant signal attenuation. In this paper, the precise glacier mass loss in Greenland from GRACE is re-estimated with correction of land-ocean leakage effects using the forward gravity modeling. The loss of Greenland ice-sheets is -102.8 +/- 9.01 Gt/a without removing leakage effect, but -183.0 +/- 19.91 Gt/a after removing the leakage effect from September 2003 to March 2008, which has a good agreement with ICESat results of -184.8 +/- 28.2 Gt/a. From January 2003 to December 2013, the total Greenland ice-sheet loss is at -261.54 +/- 6.12 Gt/a from GRACE measurements with removing the leakage effect by 42.4%, while two-thirds of total glacier melting in Greenland occurred in southern Greenland in the past 11 years. The secular leakage effects on glacier melting estimate is mainly located in the coastal areas, where larger glacier signals are significantly attenuated due to leaking out into the ocean. Furthermore, the leakage signals also have remarkable effects on seasonal and acceleration variations of glacier mass loss in Greenland. More significantly accelerated loss of glacier mass in Greenland is found at -26.19 Gt/a(2) after correcting for leakage effects. (C) 2015 Elsevier B.V. All rights reserved.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Geography, Physical ; Geosciences, Multidisciplinary
研究领域[WOS]: Physical Geography ; Geology
关键词[WOS]: SEA-LEVEL RISE ; ICE-SHEET ; HYDROLOGICAL MODELS ; SATELLITE GRAVITY ; BALANCE ; WATER
收录类别: SCI
项目资助者: Shanghai Science and Technology Commission Project(12DZ2273300) ; National Natural Science Foundation of China (NSFC)(11173050 ; 11373059)
语种: 英语
WOS记录号: WOS:000370207600014
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16151
Appears in Collections:行星科学与深空探测实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Planetary Sci, Shanghai 200030, Peoples R China
2.Bulent Ecevit Univ, Dept Geomat Engn, TR-67100 Zonguldak, Turkey
3.Univ Chinese Acad Sci, Beijing 100047, Peoples R China
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