应用GRACE卫星重力数据计算陆地水变化的相关进展评述

Review on the recent developments of terrestrial water storage variations using GRACE satellite-based datum

GRACE重力卫星自2002年3月发射至今,已进行了十多年的连续观测,由此获得的重力场变化数据被广泛地应用于研究地表河流及地下水储量变化、南极和格林兰岛冰盖厚度以及全球海平面变化等.本文从GRACE重力卫星数据的处理方法入手,对其数据特点、限制条件和水文模型计算方法等问题进行了系统总结,并针对近年来利用GRACE卫星数据开展的相关研究,从估算全球水储量的变化、区域水储量变化、地下水变化以及陆地河流流域的水储量变化等方面对相关研究和应用进行了简要评述.最后,对使用GRACE卫星数据反演陆地水储量的验证方法和存在的问题进行讨论.本文对于全面了解近年来应用GRACE卫星数据研究陆地水储量变化方面的相关进展具有参考意义.

The GRACE satellite mission,launched in March,2002,has provided continuous satellite-based gravity data of the Earth for more than 10 years.The gravity variations obtained from GRACE are widely used to infer basin-scale and underground water storage,Antarctica and Greenland ice sheet mass changes,as well as Global sea level changes.This study begins with the elaboration of GRACE satellite gravity data processing method. Then analyze and summarize the characteristics of these data, restricted condition and hydrological model. On the basis of recent advances, we summarize and estimate the global terrestrial water storage changes,regional water storage,groundwater storage and river basins which covering most of earth＇s land area.Finally,the study also discuss the validation techniques and some problems in the inversion of terrestrial water storage. This review provides some references on the understanding of application progress of GRACE satellite data on the terrestrial water storage in recent years.