GRACE’s Implication of Temporal Inertia Moment and Length of Day  

基于GRACE数据求解时变的惯量张量和日长(英文)

作　　者：陈巍 申文斌 李振海 

机构地区：[1]Department of Geophysics, School of Geodesy and Geomatics, Wuhan University [2]State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing

出　　处：《Geo-Spatial Information Science》2009年第3期225-229,共5页地球空间信息科学学报（英文）

基　　金：Supported by the Open Fund of Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, China (No.08-02-02);the Special Project Fund of State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (China);the National 863 Program of China (No.2006AA12Z211)

摘　　要：This paper aims to study the Earth's temporal inertia moment and its influence on length of day (LOD). First, the GRACE data are processed by wavelet analysis to remove abnormal jumps and noises. Then the theoretical impacts of the second-order potential coefficients on the inertia moment and LOD are studied. Finally, the processed GRACE data are applied and results show that mass redistribution has led to decreasing tendencies of inertia moment and LOD as well as some unexpected seasonal oscillations in the recent 6 years.This paper aims to study the Earth＇s temporal inertia moment and its influence on length of day （LOD）. First, the GRACE data are processed by wavelet analysis to remove abnormal jumps and noises. Then the theoretical impacts of the second-order potential coefficients on the inertia moment and LOD are studied. Finally, the processed GRACE data are applied and results show that mass redistribution has led to decreasing tendencies of inertia moment and LOD as well as some unexpected seasonal oscillations in the recent 6 years.

关 键 词：GRACE second-order potential coefficients wavelet analysis Earth＇s inertia moment variations in LOD 

分 类 号：P223[天文地球—大地测量学与测量工程]