GRACE反演格陵兰冰盖质量变化的不确定性分析与数据融合  

Uncertainty Analysis and Data Fusion for GRACE Inversion of Greenland Ice Sheet Mass Change

作　　者：贺玉麟 姚宜斌[1] 张豹[1] HE Yulin;YAO Yibin;ZHANG Bao(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079

出　　处：《测绘地理信息》2023年第3期25-29,共5页Journal of Geomatics

基　　金：国家自然科学基金(42074035)。

摘　　要：重力恢复与气候实验(gravity recovery and climate experiment,GRACE)卫星已成为观测冰盖质量变化的主要手段之一,但不同机构发布的GRACE数据在估计格陵兰冰盖质量变化上存在较大差异,在研究长期变化趋势时会产生很大不一致性。针对此问题,先分析了用不同GRACE数据估算的格陵兰冰盖质量变化数据之间的差异,再用三角帽(three-cornered hat,TCH)方法对其进行不确定性分析,并通过数据融合消除了不同数据间的不一致性。Gravity recovery and climate experiment(GRACE)has become one of the main means to observe the mass change of ice sheet.However,GRACE data from different insti⁃tutions are quite different in estimating the mass change of Green⁃land ice sheet,resulting in great inconsistency in retrieving the long-term trend.To solve this problem,we first analyze the differences of Greenland ice sheet mass change data estimated by different GRACE data,then use Three-Cornered Hat(TCH)method to analyze their uncertainty,and eliminate the inconsistency between different data through data fusion.

关 键 词：重力恢复与气候实验(gravity recovery and climate experiment GRACE)卫星 格陵兰 三角帽(three-cornered hat TCH)方法 

分 类 号：P332[天文地球—水文科学]