A research on terrestrial water storage variations with grace satellite data in the Jing-Jin-Ji region

Recently, CSR, GFZ and JPL have launched GRACE RL05 data with advantages in the spatial resolution and precision. This study explores the capability of GRACE to detect the Terrestrial Water Storage (TWS) variations in Jing-Jin-Ji Region. In this paper, we make GRACE RL05 data spatial filtering, compute and analyze TWS variations time-series and spatial trend distribution. Results show TWS in Jing-Jin-Ji Region possess obvious decreasing trend, TWS variations of CSR, JPL and GFZ from 2004 to 2014 respectively reduce in the rate of -1.13337 cm/a, -1.43606 cm/a, -1.69749 cm/a. And TWS variations spatial distribution of CSR, GFZ, JPL are strongly consistent. Besides, results also show that TWS variations accelerate significantly and decrease in southeast faster than in northwest. It is effortless to acquire that the predominant reason of TWS variations is population growth leading to badly demand for water resources. And these results tell us that TWS decreasing should be concerned.