摘要
利用Grace(Gravity Recovery And Climate Experiment)106个月连续重力异常数据,基于经验正交函数分析方法,分析了重力异常时变特征,得出了地球重力场时变信号主要起源于海水质量的移动,位于南纬40°与北纬40°带之间的结论。
Using global gravity anomaly data which were calculated from 106 months of continuous Grace(Gravity Recovery And Climate Experiment) data,based on empirical orthogonal function method,time-varying characteristics of the gravity anomaly is analyzed.The results show that: the temporal variation gravity field signal originates mainly from the sea water movement,and mostly is located at the zonal between south latitude 40 degree and north latitude 40 degree.
出处
《科学技术与工程》
北大核心
2012年第2期276-278,282,共4页
Science Technology and Engineering
基金
国家高技术研究发展计划(2009AA121405
2009AA121402)
国家自然科学基金(40974016
41004004
41104006)资助
关键词
经验正交函数
重力
重力场时变
empirical orthogonal function gravity gravity temporal variation