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Publication Date
12 March 2014

Robust Spring Drying in the Southwestern U.S. and Seasonal Migration of Wet/Dry Patterns in a Warmer Climate

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This study compares climate simulations over North America produced by a regional climate model with the driving global climate simulations as well as a multimodel ensemble of global climate simulations to investigate robust changes in water availability (precipitation (P)-evapotranspiration (E)). A robust spring-drying signal across multiple models is identified in the Southwest that results from a decrease in P and an increase in E in the future. In the boreal winter and summer, the prominent changes in P-E are associated with a north-south dipole pattern, while in spring, the prominent changes in P-E appear as an east-west dipole pattern. The progression of the north-south and east-west dipole patterns through the seasons manifests clearly as a seasonal "clockwise" migration of wet/dry patterns, which is a robust feature of water availability changes in North America consistent across regional and global climate simulations.

“Robust Spring Drying In The Southwestern U.s. And Seasonal Migration Of Wet/Dry Patterns In A Warmer Climate”. 2014. Geophysical Research Letters, 1745-1751. doi:10.1002/2014GL059562.
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