Abstract:Based on the three-dimensional atmospheric reanalysis model, the hydrological model and GRACE satellite gravity data from 2002 to 2017, we use Green’s function and the satellite gravity inversion method to analyze the gravity effect characteristics of large-scale surface fluid in Qinghai-Tibet plateau. The atmospheric gravity peak-to-peak effect before and after deducting seasonal term is between 1.9-10.7 μGal and 1.1-4.6 μGal, respectively, which shows significant seasonal characteristics. The gravity peak-to-peak effects of soil water and snow before and after deducting seasonal term is between 0.9-9.9 μGal and 0.7-8.3 μGal, respectively, which shows significant seasonal and interannual characteristics. The peak to peak change of GRACE time variable gravity field is between 4.4-24.1 μGal and 3.4-18.3 μGal before and after deducting seasonal term. Considering measurement error, tectonic movement and leakage error, the significant seasonal and interannual change of GRACE gravity reflects the combined effects of various surface fluids.
ZHU Chuandong,LIU Jinzhao,CHEN Ming et al. The Analysis on Characteristics of Gravity Effect of Large-Scale Surface Fluid in Qinghai-Tibetan Plateau[J]. jgg, 2020, 40(9): 947-951.