Anatomy of A Local Scale Drought

Wednesday, 17 December 2014: 9:15 AM
Ashok K Mishra, Clemson University, Clemson, SC, United States, Amor V M Ines, International Research Institute for Climate and Society, Columbia University, Palisades, NY, United States, Narendra N Das, Jet Propulsion Lab, Pasadena, CA, United States and Prakash Khedun, Texas A & M University, College Station, TX, United States
Drought is of global concern for society but it originates as a local problem. It has a significant impact on water quantity and quality and influences food, water, and energy security. The consequences of drought vary in space and time, from the local scale (e.g. county level) to regional scale (e.g. state or country level) to global scale. This study addresses a local-scale agricultural drought anatomy in Story County in Iowa, USA. This complex problem was evaluated using assimilated AMSR-E soil moisture and MODIS-LAI data into a crop model to generate surface and sub-surface drought indices to explore the anatomy of an agricultural drought. It was found that both surface and subsurface droughts have an impact on crop yields, albeit with different magnitudes, however, the total water available in the soil profile seemed to have a greater impact on the yield. We envisaged that the results of this study will enhance our understanding of agricultural droughts in different parts of the world.