2005 drought event in the Amazon River basin as measured by GRACE and estimated by climate models

Edited: 2011-02-21
Title2005 drought event in the Amazon River basin as measured by GRACE and estimated by climate models
Publication TypeJournal Article
Year of Publication2009
AuthorsChen, J., C. Wilson, B. Tapley, Z. L. Yang, and G. Y. Niu
JournalJournal of Geophysical Research (Solid Earth)
Volume114
Pagination05404
Date Published05/2009
Keywordsclimate, grace, terrestrial_water
AbstractSatellite gravity measurements from the Gravity Recovery and Climate Experiment (GRACE) provide new quantitative measures of the 2005 extreme drought event in the Amazon river basin, regarded as the worst in over a century. GRACE measures a significant decrease in terrestrial water storage (TWS) in the central Amazon basin in the summer of 2005, relative to the average of the 5 other summer periods in the GRACE era. In contrast, data-assimilating climate and land surface models significantly underestimate the drought intensity. GRACE measurements are consistent with accumulated precipitation data from satellite remote sensing and are also supported by in situ water-level data from river gauge stations. This study demonstrates the unique potential of satellite gravity measurements in monitoring large-scale severe drought and flooding events and in evaluating advanced climate and land surface models.
URLhttp://adsabs.harvard.edu/abs/2009JGRB..11405404C
DOI10.1029/2008JB006056