Simple method to determine the Priestley–Taylor parameter for evapotranspiration estimation using Albedo-VI triangular space from MODIS data

Yao, Yunjun; Qin, Qiming; Ghulam, Abduwasit; Liu, Shaomin; Zhao, Shaohua; Xu, Ziwei; Dong, Heng

doi:doi:10.1117/1.3557817

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Journal of Applied Remote Sensing / Volume 5 / Research Papers

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Simple method to determine the Priestley–Taylor parameter for evapotranspiration estimation using Albedo-VI triangular space from MODIS data

J. Appl. Remote Sens. 5, 053505 (Mar 11, 2011); http://dx.doi.org/10.1117/1.3557817

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Abstract

References (52)

Yunjun Yao, Qiming Qin, Shaohua Zhao, and Heng Dong

Peking University, Institute of Remote Sensing and GIS, Beijing, 100871, China

Beijing Normal University, College of Global Change and Earth System Science, Beijing,100875, China

Abduwasit Ghulam

Saint Louis University, Department of Earth and Atmospheric Sciences and Center for Environmental Sciences, St. Louis, Missouri 63103, USA

Shaomin Liu and Ziwei Xu

Beijing Normal University, State Key laboratory of Remote Sensing Science, School of Geography, Beijing, 100875, China

Ministry of Environmental Protection, Environmental Satellite Center, Beijing, 100094, China

In this contribution, we present a simple method based on Albedo-VI (vegetation index) triangular space to determine the Priestley–Taylor parameter for estimating evaporative fraction (EF) and evapotranspiration (ET) in arid and semi-arid regions. We apply this method to MODIS and observation data acquired during the Heihe river basin field experiment from July 1 to September 30, 2008. Results show that the decreasing trend of the estimated EF from MODIS data is consistent with that of precipitation during the period of day 183 to 274, 2008. The bias of estimated daily ET deviating from the corresponding ground-measured ET is −8.66 W/m² and the root-mean-square error is 21.55 W/m², indicating the Albedo-VI triangular method has a potential in ET estimation as a simple satellite-based method independent of surface ancillary data.

History

Received Sep 03, 2010
Accepted Feb 01, 2011
Revised Jan 14, 2011
Published online Mar 11, 2011

Digital Object Identifier

http://dx.doi.org/10.1117/1.3557817

Citation

Yunjun Yao, Qiming Qin, Abduwasit Ghulam, Shaomin Liu, Shaohua Zhao, Ziwei Xu and Heng Dong, "Simple method to determine the Priestley–Taylor parameter for evapotranspiration estimation using Albedo-VI triangular space from MODIS data", J. Appl. Remote Sens. 5, 053505 (Mar 11, 2011); http://dx.doi.org/10.1117/1.3557817