EWRE Seminar

Start Date: 
Wednesday, March 9, 2016 - 5:00pm to 6:00pm

Room 1670 Beyster Building

Presenter: 
Enrique R. Vivoni

Speaker: Dr. Enrique R. Vivoni, Professor School of Earth and Space Exploration & School of Sustainable Engineering and Built Environment, Global Institute of Sustainability, Arizona State University Tempe, AZ

Title: Terrestrial Sources of Evapotranspiration in the Southwestern U.S. and Northwest Mexico (seminar announcement attached)

Abstract:
Despite its importance in the hydrological cycle, the fluxes of water vapor derived from the terrestrial land surface are difficult to estimate. In this talk, I will present recent estimates of evapotranspiration and its abiotic and biotic components obtained from a macroscale hydrologic model that has been modified to properly account for natural ecosystem structure and agricultural areas in the region. Daily, seasonal and annual evapotranspiration estimates over 2000-2012 are compared to a network of eddy covariance towers, to water balance estimates and to remotely-sensed and model-derived gridded products. The confidence built on the macroscale model estimates provides a means to assess the major sources of evapotranspiration during winter and summer seasons. In addition, an assessment of the impact of two types of land cover change - agricultural extensification and deforestation for pasture establishment – on regional evapotranspiration is discussed.

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