Ice mass change in the Amur Drainage Basin estimated from multi-source observations

The Amur River, with a total length of 4440 kilometers, is one of the major Asian rivers as well as the tenth largest river in the world flowing through China, Mongolia and Russia. As one of the high latitude rivers, the characteristics of terrestrial water storage(TWS) in Amur Drainage Basin are different from those in the middle and low latitude rivers. Its runoff is influenced by precipitation as well as the ice melt water, in this case, the research on this region has a unique scientific significance. In this study, Gravity Recovery and Climate Experiment(GRACE) time-varying gravity data is used to inverse the change of TWS in order to study the seasonal and interannual change of water storage in Amur Drainage Basin. By introducing Global Land Data Assimilation System(GLDAS) hydrological model and Global Precipitation Measurement(GPM) precipitation data, we can get the mass change of ice and snow of this area with water balance method. The result shows that the mass change of ice and snow detected by GRACE fits well with the trend of temperature. Which means GRACE combined with multi-source data has the ability to detect the change of ice and snow in high latitude rivers during the ice age.