GRACE’s implication of temporal inertia moment and length of day |
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| Authors: | Wei Chen Wenbin Shen Zhenhai Li |
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| Institution: | (1) Department of Geophysics, School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan, 430079, China;(2) State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, 129 Luoyu Road, Wuhan, 430079, China |
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| Abstract: | 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.
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). |
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| Keywords: | GRACE second-order potential coefficients wavelet analysis Earth’ s inertia moment variations in LOD |
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