Influence of Regional Crustal Structure Differences on GRACE-FO Inversion of Vertical Deformation of Terrestrial Water Load in China in the Last 10 Months
Abstract：To reveal the spatio-temporal characteristics of terrestrial water storage evolution in China during 2018-06 to 2019-05, we propose the latest GRACE-FO(GRACE-Follow On) time-variable gravity field model released by CSR, JPL, and GFZ. At the same time, we analyze the effect of regional crustal structure differences on GRACE-FO gravity data to retrieve the vertical deformation of terrestrial water load by Hard and PREM models. The results show that the relative difference of radial load Love number with 60th order is -4.267%, and the largest difference of vertical load deformation with the first 60th order is located in the Lancang river area in Yunnan, with an amplitude of about 0.7 mm/a. Therefore, when using GRACE-FO gravity satellite data to estimate the vertical load deformation in China, the influence of regional crustal structure cannot be ignored.
LI Wanqiu,WANG Wei,ZHANG Chuanyin et al. Influence of Regional Crustal Structure Differences on GRACE-FO Inversion of Vertical Deformation of Terrestrial Water Load in China in the Last 10 Months[J]. jgg, 2021, 41(7): 707-713.
