Abstract:Based on GPS observation data from Gansu continuously operational reference system(CORS) and crustal movement observation network of China(CMONOC), we calculate the vertical deformation of 48 stations. We perform a comparative analysis between GPS vertical displacement and GRACE vertical deformation calculated by CSR RL05M data. The results show local characteristics of vertical deformation in the study area. There is significant difference between eastern Gansu province and the other areas. Correlation coefficient, RMS reduction, and annual amplitude reduction are larger than the other areas. The mean correlation coefficient of GPS and GRACE vertical deformation time series without trend term is 0.72. The mean annual amplitude of GPS and GRACE are 6.00 mm and 3.70 mm respectively. Mean annual amplitude reduction and RMS reduction are 0.51 and 0.29.The results indicate strong consistency. GRACE vertical deformation can explain more than 50% of the annual GPS vertical displacement signal. An average of about 29% of the crustal deformation contained in GPS vertical displacement time series is induced by environmental loading.
GUO Feixiao,GU Yanchao,CUI Yang et al. Analysis of Vertical Deformation in Shaanxi-Gansu-Ningxia Area by GPS and GRACE Data[J]. jgg, 2020, 40(7): 697-703.