南方科技大学知识苑(SUSTech KC): Analysis and Mitigation of Biases in Greenland Ice Sheet Mass Balance Trend Estimates From GRACE Mascon Products

题名	Analysis and Mitigation of Biases in Greenland Ice Sheet Mass Balance Trend Estimates From GRACE Mascon Products
作者	Ran, Jiangjun1,2 ; Ditmar, Pavel 3; Liu, Lin 4; Xiao, Yun 5; Klees, Roland 3; Tang, Xueyuan 6
通讯作者	Ran, Jiangjun
发表日期	2021-07-01
DOI	10.1029/2020JB020880
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 影响因子和分区
ISSN	2169-9313
EISSN	2169-9356
卷号	126 期号:7
摘要	Mascon products derived from Gravity Recovery and Climate Experiment satellite gravimetry data are widely used to study the Greenland ice sheet mass balance. However, the products released by different research groups-JPL, CSR, and GSFC-show noticeable discrepancies. To understand them, we compare those mascon products with mascon solutions computed in-house using a varying regularization parameter. We show that the observed discrepancies are likely dominated by differences in the applied regularization. Furthermore, we present a numerical study aimed at an in-depth analysis of regularization-driven biases in the solutions. We demonstrate the ability of our simulations to reproduce 60%-80% of biases observed in real data, which proves that our simulations are sufficiently realistic. After that, we demonstrate that the quality of mascon-based estimates can be increased by a proper modification of the applied regularization: no correlation between mascons is assumed when they belong to different drainage systems. Using both simulations and real data analysis, we show that the improved regularization mitigates signal leakage between drainage systems by 11%-56%. Finally, we validate various mascon solutions over the SW drainage system, using trends from (i) the GOCO-06S model and (ii) the Input-Output Method as control data. In general, the in-house computed trend estimates are consistent with the trends from CSR and JPL solutions and the trends from the control data.
关键词	mascon GRACE satellite gravimetry mass balance regularization
相关链接	[来源记录]
收录类别	SCI
语种	英语
学校署名	第一 ; 通讯
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000678880700051
出版者	AMER GEOPHYSICAL UNION
ESI学科分类	GEOSCIENCES
来源库	Web of Science
引用统计	被引频次[WOS]：15
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/242050
专题	理学院_地球与空间科学系
作者单位	1.Southern Univ Sci & Technol, Shenzhen Key Lab Deep Offshore Oil & Gas Explorat, Shenzhen, Peoples R China 2.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Peoples R China 3.Delft Univ Technol, Dept Geosci & Remote Sensing, Delft, Netherlands 4.Chinese Univ Hong Kong Hong, Fac Sci, Earth Syst Sci Programme, Hong Kong, Peoples R China 5.Xian Res Inst Surveying & Mapping, Xian, Peoples R China 6.Polar Res Inst China, Key Lab Polar Sci, Minist Nat Resources MNR, Shanghai, Peoples R China
第一作者单位	南方科技大学; 地球与空间科学系
通讯作者单位	南方科技大学; 地球与空间科学系
第一作者的第一单位	南方科技大学
推荐引用方式 GB/T 7714	Ran, Jiangjun,Ditmar, Pavel,Liu, Lin,et al. Analysis and Mitigation of Biases in Greenland Ice Sheet Mass Balance Trend Estimates From GRACE Mascon Products[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(7).
APA	Ran, Jiangjun,Ditmar, Pavel,Liu, Lin,Xiao, Yun,Klees, Roland,&Tang, Xueyuan.(2021).Analysis and Mitigation of Biases in Greenland Ice Sheet Mass Balance Trend Estimates From GRACE Mascon Products.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(7).
MLA	Ran, Jiangjun,et al."Analysis and Mitigation of Biases in Greenland Ice Sheet Mass Balance Trend Estimates From GRACE Mascon Products".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.7(2021).