利用GRACE反演长江流域水储量变化

¹武汉大学中国南极测绘研究中心,武汉市珞喻路129号430079;²极地测绘科学国家测绘局重点实验室,武汉市珞喻路129号,430079;³珠海市海洋与渔业环境监测中心,珠海市梅华东路465号,519000;⁴三峡大学三峡库区地质灾害教育部重点实验室,宜昌市大学路8号443002;⁵武汉大学测绘学院,武汉市珞喻路129号430079

基金项目: 中国极地科学战略研究基金资助项目；国家测绘局重点项目极地基础测绘保障资助项目

详细信息

Recovery of Yangtze River Basin Water Storage Variations by GRACE Observations

¹Chinese Antarctic Center of Surveying and Mapping,Wuhan University,129 Luoyu Road,Wuhan 430079,China;²Key Laboratory of Polar Surveying and Mapping SBSM,Wuhan University,129 Luoyu Road,Wuhan 430079,China;³Zhuhai Ocean and Fishery Environment Monitoring Center,465 East Meihua Road,Zhuhai 519000,China;⁴Key Lab.of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education,Three Gorges University, 8 Daxue Road,Yichang 443002,China;⁵School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China

Funds: 中国极地科学战略研究基金资助项目；国家测绘局重点项目极地基础测绘保障资助项目

摘要: 利用GRACE重力卫星2003年1月~2006年9月共计43个月的时变重力场数据,反演了长江流域水储量的变化。结果显示,基于GRACE数据的反演结果和CPC模型符合得相当好;若考虑低阶项的影响,对GRACE的反演结果有很明显的改进。
- GRACE /
- 重力场 /
- 长江流域
Abstract: Using 43 monthly gravity models observed by GRACE satellites from January 2003 to September 2006,we estimate Yangtze River basin water storage variations.We examine how treatment of C20 and one-degree harmonics affect GRACE based the estimation of basin-scale water storage changes,using independently derived C20 harmonic from satellite laser ranging(SLR) observations and one-degree harmonics from geocenter seasonal variations.GRACE based water storage changes are compared with estimation from CPC hydrological model.Results show remarkably good agreement with CPC in the Yangtze River basin.Combining GRACE observations with SLR degree-2 spherical harmonic and geocenter seasonal variations apparently improves the estimation inYangtze River basin.
- GRACE /
- gravity /
- Yangtze River basin