Analysis of terrestrial water storage changes from GRACE and GLDAS

被引:514
作者
Syed, Tajdarul H. [1 ]
Famiglietti, James S. [1 ]
Rodell, Matthew [2 ]
Chen, Jianli [3 ]
Wilson, Clark R. [4 ]
机构
[1] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92717 USA
[2] NASA, Goddard Space Flight Ctr, Hydrol Sci Branch, Greenbelt, MD 20771 USA
[3] Univ Texas Austin, Ctr Space Res, Austin, TX 78712 USA
[4] Univ Texas Austin, Dept Geol Sci, Austin, TX 78712 USA
关键词
D O I
10.1029/2006WR005779
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
[1] Since March 2002, the Gravity Recovery and Climate Experiment (GRACE) has provided first estimates of land water storage variations by monitoring the time-variable component of Earth's gravity field. Here we characterize spatial-temporal variations in terrestrial water storage changes (TWSC) from GRACE and compare them to those simulated with the Global Land Data Assimilation System (GLDAS). Additionally, we use GLDAS simulations to infer how TWSC is partitioned into snow, canopy water and soil water components, and to understand how variations in the hydrologic fluxes act to enhance or dissipate the stores. Results quantify the range of GRACE-derived storage changes during the studied period and place them in the context of seasonal variations in global climate and hydrologic extremes including drought and flood, by impacting land memory processes. The role of the largest continental river basins as major locations for freshwater redistribution is highlighted. GRACE-based storage changes are in good agreement with those obtained from GLDAS simulations. Analysis of GLDAS-simulated TWSC illustrates several key characteristics of spatial and temporal land water storage variations. Global averages of TWSC were partitioned nearly equally between soil moisture and snow water equivalent, while zonal averages of TWSC revealed the importance of soil moisture storage at low latitudes and snow storage at high latitudes. Evapotranspiration plays a key role in dissipating globally averaged terrestrial water storage. Latitudinal averages showed how precipitation dominates TWSC variations in the tropics, evapotranspiration is most effective in the midlatitudes, and snowmelt runoff is a key dissipating flux at high latitudes. Results have implications for monitoring water storage response to climate variability and change, and for constraining land model hydrology simulations.
引用
收藏
页数:15
相关论文
共 49 条
[1]  
Adler RF, 2003, J HYDROMETEOROL, V4, P1147, DOI 10.1175/1525-7541(2003)004<1147:TVGPCP>2.0.CO
[2]  
2
[3]   Tracking fresh water from space [J].
Alsdorf, DE ;
Lettenmaier, DP .
SCIENCE, 2003, 301 (5639) :1491-+
[4]  
[Anonymous], INT GEOPHYSICS SERIE
[5]   GLOBAL SURFACE-WATER-INDUCED SEASONAL-VARIATIONS IN THE EARTHS ROTATION AND GRAVITATIONAL-FIELD [J].
CHAO, BF ;
OCONNOR, WP .
GEOPHYSICAL JOURNAL-OXFORD, 1988, 94 (02) :263-270
[6]   Attenuation effect on seasonal basin-scale water storage changes from GRACE time-variable gravity [J].
Chen, J. L. ;
Wilson, C. R. ;
Famiglietti, J. S. ;
Rodell, Matt .
JOURNAL OF GEODESY, 2007, 81 (04) :237-245
[7]   Spatial sensitivity of the Gravity Recovery and Climate Experiment (GRACE) time-variable gravity observations [J].
Chen, JL ;
Wilson, CR ;
Famiglietti, JS ;
Rodell, M .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2005, 110 (B8) :1-8
[8]  
Church JA, 2001, CLIMATE CHANGE 2001: THE SCIENTIFIC BASIS, P639
[9]   Implementation of Noah land surface model advances in the National Centers for Environmental Prediction operational mesoscale Eta model [J].
Ek, MB ;
Mitchell, KE ;
Lin, Y ;
Rogers, E ;
Grunmann, P ;
Koren, V ;
Gayno, G ;
Tarpley, JD .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2003, 108 (D22)
[10]   Precipitation recycling [J].
Eltahir, EAB ;
Bras, RL .
REVIEWS OF GEOPHYSICS, 1996, 34 (03) :367-378