Seasonal gravity changes estimated from GRACE data  

作　　者：Zhengbo Zou Hui Li Zhicai Luo Lelin Xing 

机构地区：[1]School of Geodesy and Geodynamics , Wuhan University, Wuhan 430079, China [2]Institute of Seismology, China Earthquake Administration, Wuhan 430071, China [3]Crustal Movement Laboratory, Wuhan 430071, China

出　　处：《Geodesy and Geodynamics》2010年第1期57-63,共7页大地测量与地球动力学（英文版）

基　　金：supported by the National Technology Support(2008BAC354B05);the National Natural Science Foundation of China(40704009)

摘　　要：Since 2002, the GRACE program has provided a large amount of high-precision data, which can be used to detect temporal gravity variations related to global mass re-distribution inside the fluid envelop of the surface of the Earth. In order to make use of the GRACE data to investigate earthquake-related gravity changes in China, we first studied the degree variances of the monthly GRACE gravity field models, and then applied decorrelation and Gaussian smoothing method to obtain seasonal gravity changes in China. By deducting the multi-year mean seasonal variations from the seasonal maos,we found some earthouake-related gravity anomalies.Since 2002, the GRACE program has provided a large amount of high-precision data, which can be used to detect temporal gravity variations related to global mass re-distribution inside the fluid envelop of the surface of the Earth. In order to make use of the GRACE data to investigate earthquake-related gravity changes in China, we first studied the degree variances of the monthly GRACE gravity field models, and then applied decorrelation and Gaussian smoothing method to obtain seasonal gravity changes in China. By deducting the multi-year mean seasonal variations from the seasonal maos,we found some earthouake-related gravity anomalies.

关 键 词：GRACE EARTHQUAKE gravity variations DECORRELATION Gaussian smoothing. 

分 类 号：P315.7[天文地球—地震学] S154.3[天文地球—固体地球物理学]