Using nonlinear programming to correct leakage and estimate mass change from GRACE observation and its application to Antarctica

	Using nonlinear programming to correct leakage and estimate mass change from GRACE observation and its application to Antarctica
	Tang, Jingshi 1,2; Cheng, Haowen3 ; Liu, Lin 1,2
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2012-11-27
卷号	117
英文摘要	The Gravity Recovery And Climate Experiment (GRACE) mission has been providing high quality observations since its launch in 2002. Over the years, fruitful achievements have been obtained and the temporal gravity field has revealed the ongoing geophysical, hydrological and other processes. These discoveries help the scientists better understand various aspects of the Earth. However, errors exist in high degree and order spherical harmonics, which need to be processed before use. Filtering is one of the most commonly used techniques to smooth errors, yet it attenuates signals and also causes leakage of gravity signal into surrounding areas. This paper reports a new method to estimate the true mass change on the grid (expressed in equivalent water height or surface density). The mass change over the grid can be integrated to estimate regional or global mass change. This method assumes the GRACE-observed apparent mass change is only caused by the mass change on land. By comparing the computed and observed apparent mass change, the true mass change can be iteratively adjusted and estimated. The problem is solved with nonlinear programming (NLP) and yields solutions which are in good agreement with other GRACE-based estimates.
收录类别	SCI
语种	英语
WOS记录号	WOS:000311851300001
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6196]
专题	国家天文台_空间科学研究部
作者单位	1.Nanjing Univ, Sch Astron & Space Sci, Key Lab Modern Astron & Astrophys, Minist Educ,Inst Space Environm & Astrodynam, Nanjing 210093, Jiangsu, Peoples R China 2.Beijing Aerosp Control Ctr, Key Lab Sci & Technol Aerosp Flight Dynam, Beijing, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Tang, Jingshi,Cheng, Haowen,Liu, Lin. Using nonlinear programming to correct leakage and estimate mass change from GRACE observation and its application to Antarctica[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2012,117.
APA	Tang, Jingshi,Cheng, Haowen,&Liu, Lin.(2012).Using nonlinear programming to correct leakage and estimate mass change from GRACE observation and its application to Antarctica.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,117.
MLA	Tang, Jingshi,et al."Using nonlinear programming to correct leakage and estimate mass change from GRACE observation and its application to Antarctica".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 117(2012).