摘要
利用地球重力卫星GRACE(Gravity Recovery and Climate Experiment)2005年1月～2010年4月期间64个月的数据,对我国西南地区陆地水储量变化进行了反演.结果表明,选取适当的高斯半径(R=600 km)和所采用数据的平均引力场作为背景引力场,则基于GRACE数据反演的西南陆地水储量很好地反映了2010年初的西南旱情.
Based on the 64-month data of GRACE （Gravity Recovery and Climate Ex- periment） from January 2005 to April 2010, the inversion of the landwater storage in the southwest China is carried out in this paper. GRACE is a near polar orbiting satellite, so the subsatellite points become dense with increasing latitude, and thus the region with a higher latitude has a higher spatial resolution. By repeated calculations and comparison, it is found that with appropriate Gaussian radius （R = 600 km） in the southwest China and taking the monthly average gravitational field as the background gravitational field, the landwater storage estimated from GRACE data well reflects the climate change and the drought in early 2010.
出处
《天文学报》
CSCD
北大核心
2011年第2期145-151,共7页
Acta Astronomica Sinica
关键词
天体测量学
天体力学
方法
数值
astrometry, celestial mechanics, methods numerical
