利用GRACE卫星时变重力场监测长江、黄河流域水储量变化

TERRESTRIAL WATER STORAGE CHANGE IN THE YANGTZE AND YELLOW RIVER BASINS FROM GRACE TIME-VARIABLE GRAVITY MEASUREMENTS

利用GRACE时变地球重力场数据反演长江、黄河流域的水储量变化,并对比水文模型研究其季节性和年际变化特征。将流域水储量变化与降水资料进行对比分析发现,长江、黄河流域的水储量变化与降水量在不同尺度和频段存在较好的时空变化一致性。研究表明,利用GRACE时变重力场可以监测全球陆地水储量的变化,其监测能力可揭示cm级等效水高变化。

Terrestrial water storage （TWS）change in the Yangtze and Yellow River Basins was investigated u- sing time-variable gravity data from GRACE. Comparisons between GRACE-derived TWS change and hydrological models in seasonal and interannual scale indicate that the TWS variation in the Basins is consistent with precipitation in temporal and spatial patterns. The results demonstrate that time-variable gravity data from GRACE can be used to monitor global or regional TWS change and equivalent water height changes in cm level.