Global Freshwater Storage Capability across Time Scales in the GRACE Satellite Era

作     者：Enda ZHU Xing YUAN Enda ZHU;Xing YUAN

作者机构：Key Laboratory of Regional Climate-Environment for Temperate East Asia(RCE-TEA)Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China School of Hydrology and Water ResourcesNanjing University of Information Science and TechnologyNanjing 210044China College of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2021年第38卷第6期

页      面：905-917页

核心收录：

学科分类：08[工学] 081501[工学-水文学及水资源] 0815[工学-水利工程] 

基　　金：the National Key R&D Program of China(2018YFA0606002) the National Natural Science Foundation of China(41875105) the Startup Foundation for Introducing Talent of NUIST(2018r078) 

主　　题：freshwater GRACE land surface model soil moisture climate variability storage capability 

摘      要：Freshwater is recharged mainly by rainfall and stored inland for a period of time,which is directly affected by its storage *** storage capability of river basins has different spatiotemporal features that are important for the predictability of freshwater ***,the estimation of freshwater storage capability(FSC)remains a challenge due to the lack of observations and quantification ***,we use a metric that characterizes hydrological“inertiaafter rainfalls to analyze FSC over the 194 largest global major river basins based on satellite observations from the Gravity Recovery and Climate Experiment(GRACE)and simulations from the Community Land Model version 5(CLM5).During 2003–16,the global land was observed to retain 28%of precipitation after one month based on GRACE observations,and the simulation depicts that the retained proportions decrease from 42%after one day to 26%after one month,with smaller FSC partly attributed to wetter conditions and higher vegetation *** root zone contributes about 40%to the global land FSC on daily to monthly time *** the time scale increases,the contribution from the surface soil decreases from 26%to 14%,while the contribution from the deep soil increases from 4%to 10%.Snow contributes over 20%of land FSC,especially over high *** six decades of CLM5 long-term simulations,it is revealed that the change of FSC in most basins is related to internal climate *** FSC of river basins which displays the proportion of precipitation retained on land is worthy of further attention regarding the predictability of water resources.