Satellite-Based Analysis of Ecological Controls For Land-Surface Evaporation Resistance
Encyclopedia of Hydrological Sciences
John Wiley & Sons, Ltd.
Lack of available water constrains ecological processes for two-thirds of the earth's biosphere. These water limitations are manifested as either physical water deficiency or as a chemical unavailability of water as a result of being frozen. This article summarizes global principles of water limitations on the biosphere, and physiological limitations on plants. It presents hydrometeorological principles of evapotranspiration and organizing logic of the soil–vegetation–atmosphere transfer models commonly used to compute evapotranspiration. We then introduce remote sensing from both optical/thermal and active/passive microwave sensors for calculating landscape scale evapotranspiration. Finally, we offer a multisensor-based integrated surface resistance to define landscape water availability under all conditions.
drought, Evapotranspiration, Freeze-thaw, HYDROS, MODIS, remotesensing, surfaceresistance, vegetation
© 2005 John Wiley & Sons, Ltd.
Running, S. W. and Kimball, J. S. 2005. Satellite-Based Analysis of Ecological Controls for Land-Surface Evaporation Resistance. Encyclopedia of Hydrological Sciences, edited by M. Anderson, 9:104, http://dx.doi.org/10.1002/0470848944.hsa110