Research Papers

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

[+] Author Affiliations
Yunjun Yao

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

Qiming Qin

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

Abduwasit Ghulam

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

Shaomin Liu

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

Shaohua Zhao

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

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

Ziwei Xu

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

Heng Dong

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

J. Appl. Remote Sens. 5(1), 053505 (March 11, 2011). doi:10.1117/1.3557817
History: Received September 03, 2010; Revised January 14, 2011; Accepted February 01, 2011; Published March 11, 2011; Online March 11, 2011
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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.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Topics

MODIS ; Radiation

Citation

Yunjun Yao ; Qiming Qin ; Abduwasit Ghulam ; Shaomin Liu ; Shaohua Zhao, et al.
"Simple method to determine the Priestley–Taylor parameter for evapotranspiration estimation using Albedo-VI triangular space from MODIS data", J. Appl. Remote Sens. 5(1), 053505 (March 11, 2011). ; http://dx.doi.org/10.1117/1.3557817


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