GRACE-based estimates of groundwater variations over North America from 2002 to 2017

作     者：Hansheng Wang Longwei Xiang Holger Steffen Patrick Wu Liming Jiang Qiang Shen Zhen Li Masaki Hayashi Hansheng Wang;Longwei Xiang;Holger Steffen;Patrick Wu;Liming Jiang;Qiang Shen;Zhen Li;Masaki Hayashi

作者机构：State Key Laboratory of Geodesy and Earth's DynamicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China University of Chinese Academy of SciencesBeijing 100049China School of GeosciencesYangtze UniversityWuhan 430100China Lantmateriet80182GavleSweden Department of GeoscienceUniversity of CalgaryCalgaryCanada 

出 版 物：《Geodesy and Geodynamics》 (大地测量与地球动力学（英文版）)

年 卷 期：2022年第13卷第1期

页      面：11-23页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

基　　金：This work is funded by the National Key R&D Program of China(2017YFA0603103) the National Natural Science Foundation of China(41974009 and 42004007) Key Research Program of Frontier Sciences,CAS(QYZDB-SSW-DQC042 and QYZDJ-SSW-DQC027) Alberta Innovates(the Groundwater Recharge in the Prairies project) 

主　　题：North America Gravity recovery and climate experiment (GRACE) GNSS Groundwater Precipitation Drought 

摘      要：GRACE-based estimates for groundwater storage(GWS)changes in North America substantially depend upon correction of glacialisostatic adjustment(GIA)effects,which are usually removed with GIA *** this study,GIA effects are eliminated by employing an independent separation approach with the aid of Global Navigation Satellite System(GNSS)vertical velocity *** goal is to provide an independent estimate for monthly GWS changes within North America in 1-degree-grids and their trends over the whole GRACE mission lifetime from April 2002 to June *** estimate is derived from the release-6 version of GRACE monthly level-2 data,GNSS data,land surface models for soil moisture and snow wa-ter equivalent,and satellite altimetric lake *** find a GWS anomaly in form of an increasing trend in Saskatchewan,which affects the Saskatchewan Province and the states of Montana,North Dakota and Minnesota,and 4 GWS anomalies with declining trends in Nevada,California,Arizona and Texas,*** monthly changes of these GWS anomalies,except for the one in Nevada,are validated by well level *** provide results for average monthly GWS changes and the trends for the 5 anomalies but also in separate form for the 13 affected states or *** increasing trends of the Saskatchewan GWS anomaly and the affected 3 states are related to increasing precipitation and can be elucidated by the decreasing drought intensity *** the contrary,the declining trends in GWS can be explained by weakening precipitation and are mostly supported by the increasing drought intensity level in the other 4 anomalies and the affected states,which are Nevada,California,Arizona,New Mexico,Texas,Oklahoma,Kansas,and *** of monthly GWS changes and their trendscan serveas alternativeand beneficial input for the sustainable management of groundwater resources in North America.