GRACE satellite monitoring of large depletion in water storage in response to the 2011 drought in Texas

被引：317

作者：

Long, Di ^{[1
]}

Scanlon, Bridget R. ^{[1
]}

Longuevergne, Laurent ^{[2
]}

Sun, Alexander Y. ^{[1
]}

Fernando, D. Nelun ^{[3
,4
]}

Save, Himanshu ^{[5
]}

机构：

[1] Univ Texas Austin, Jackson Sch Geosci, Bur Econ Geol, Austin, TX 78758 USA

[2] Univ Rennes 1, UMR CNRS 6118, Geosci Rennes, Rennes, France

[3] Univ Texas Austin, Dept Geol Sci, Austin, TX 78758 USA

[4] Texas Water Dev Board, Surface Water Resources Div, Austin, TX USA

[5] Univ Texas Austin, Ctr Space Res, Austin, TX 78758 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2013年 / 40卷 / 13期

关键词：

drought monitoring; GRACE; soil moisture storage; groundwater storage; NLDAS; GLDAS; ASSIMILATION; MOISTURE; MODEL;

D O I：

10.1002/grl.50655

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Texas experienced the most extreme one-year drought on record in 2011 with precipitation at 40% of long-term mean and agricultural losses of similar to$7.6 billion. We assess the value of Gravity Recovery and Climate Experiment (GRACE) satellite-derived total water storage (TWS) change as an alternative remote sensing-based drought indicator, independent of traditional drought indicators based on in situ monitoring. GRACE shows depletion in TWS of 62.3 +/- 17.7 km(3) during the 2011 drought. Large uncertainties in simulated soil moisture storage depletion (14-83 km(3)) from six land surface models indicate that GRACE TWS is a more reliable drought indicator than disaggregated soil moisture or groundwater storage. Groundwater use and groundwater level data indicate that depletion is dominated by changes in soil moisture storage, consistent with high correlation between GRACE TWS and the Palmer Drought Severity Index. GRACE provides a valuable tool for monitoring statewide water storage depletion, linking meteorological and hydrological droughts.

引用

页码：3395 / 3401

页数：7

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