This research is funded by the National Natural Science Foun-dation of China(E3ER0402A2,E421040401),the University of Chinese Academy of Sciences Research Start-up Grant(110400M003),and the Fundamental Research Funds for the Cen-tral Universities(E2ET0411X2).The authors are grateful to the Center for Space Research,University of Texas at Austin(http://www2.csr.utexas.edu/grace),the NASA Goddard Space Flight Cen-ter(https://earth.gsfc.nasa.gov/geo/data/grace-mascons),and the Jet Propulsion Laboratory(https://podaac.jpl.nasa.gov/dataset/TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.1_V3)for providing the GRACE mascon solutions.The authors also are grateful for the water storage data driven by climate change pro-vided by Humphrey. （E3ER0402A2,E421040401）