Time-variable gravity from GRACE: First results

被引：582

作者：

Wahr, J ^{[1
]}

Swenson, S

Zlotnicki, V

Velicogna, I

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] Univ Colorado, CIRES, Boulder, CO 80309 USA

[3] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2004年 / 31卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1029/2004GL019779

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Eleven monthly GRACE gravity field solutions are now available for analyses. We show those fields can be used to recover monthly changes in water storage, both on land and in the ocean, to accuracies of 1.5 cm of water thickness when smoothed over 1000 km. The amplitude of the annually varying signal can be determined to 1.0 cm. Results are 30% better for a 1500 km smoothing radius, and 40% worse for a 750 km radius. We estimate the annually varying component of water storage for three large drainage basins (the Mississippi, the Amazon, and a region draining into the Bay of Bengal), to accuracies of 1.0-1.5 cm.

引用

页码：L115011 / 4

页数：4

共 11 条

[1] Quality of wind stress fields measured by the skill of a barotropic ocean model: Importance of stability of the Marine Atmospheric Boundary Layer [J].