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A Comparison of Satellite Data-Based Drought Indicators in Detecting the 2012 Drought in the Southeastern USThe drought of 2012 in the North America devastated agricultural crops and pastures, further damaging agriculture and livestock industries and leading to great losses in the economy. The drought maps of the United States Drought Monitor (USDM) and various drought monitoring techniques based on the data collected by the satellites orbiting in space such as the Gravity Recovery and Climate Experiment (GRACE) and the Moderate Resolution Imaging Spectroradiometer (MODIS) are inter-compared during the 2012 drought conditions in the southeastern United States. The results indicated that spatial extent of drought reported by USDM were in general agreement with those reported by the MODIS-based drought maps. GRACE-based drought maps suggested that the southeastern US experienced widespread decline in surface and root-zone soil moisture and groundwater resources. Disagreements among all drought indicators were observed over irrigated areas, especially in Lower Mississippi region where agriculture is mainly irrigated. Besides, we demonstrated that time lag of vegetation response to changes in soil moisture and groundwater partly contributed to these disagreements, as well.
Document ID
20180002643
Acquisition Source
Goddard Space Flight Center
Document Type
Book Chapter
Authors
Yagci, Ali Levent (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Santanello, Joseph A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Rodell, Matthew (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Deng, Meixia (George Mason Univ. Fairfax, VA, United States)
Di, Liping (George Mason Univ. Fairfax, VA, United States)
Date Acquired
May 1, 2018
Publication Date
April 29, 2018
Publication Information
Publication: Remote Sensing of Hydrometeorological Hazards
Publisher: CRC-Press - Taylor & Francis Group
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN42302
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
drought indicators
MODIS
drought monitoring

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