Yao, Yunjun and Qin, Qiming and Ghulam, Abduwasit and Liu, Shaomin and Zhao, Shaohua and Xu, Ziwei and Dong, Heng (2011) Simple method to determine the Priestley–Taylor parameter for evapotranspiration estimation using Albedo-VI triangular space from MODIS data. Journal of Applied Remote Sensing, 5. pp. 1-16.
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Abstract
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 thismethod 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.
| Item Type: | Article |
|---|---|
| Author Affiliation: | Peking University, Institute of Remote Sensing and GIS, Beijing, 100871, China |
| Subjects: | Atmosperic Science |
| Divisions: | General |
| Depositing User: | Sandhya Gir |
| Date Deposited: | 02 Jun 2011 05:07 |
| Last Modified: | 02 Jun 2011 05:07 |
| Official URL: | http://dx.doi.org/10.1117/1.3557817 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/2089 |
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