摘要
基于GRACE重力卫星的时变地球重力资料，反演了全球及我国西南地区的陆地水储量变化，通过最小二乘线性拟合出陆地水储量的线性变化趋势及其变化速率。结果表明：全球陆地水储量变化总体呈逐渐增加的趋势，等效水高变化速率为0.142±0.002 8 cm/年，具有显著的季节性变化，水储量周年变化明显；2009年9月~2010年4月我国西南地区特大干旱也得到了较好的反映。
Based on the time-varying gravity anomaly data of the GRACE mission, the terrestrial water storage variations in world and southwest China were estimated. The linear trends and changes in the rate of the terrestrial water storage were fitted by the Least Squares. It can be seen that the terrestrial water storage has a gradually increasing trend on the whole, the rate is 0. 142 ±0. 0028 cm/year. In addition, with obvious yearly cycles, the terrestrial water storage variations in this area exhibit significant seasonal variations; And reflects well the severe drought in southwest provinces from Sep. 2009 to Apr. 2010.
出处
《安徽农业科学》
CAS
2015年第35期347-350,共4页
Journal of Anhui Agricultural Sciences
关键词
GRACE
时变重力场
西南地区
陆地水储量
GRACE
Time-variable gravity field
Southwest China
Terrestrial water storage variation
