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12 Mar 2012
Status : this preprint was under review for the journal HESS but the revision was not accepted.
Evaluation of a complementary based model for mapping land surface evapotranspiration
Z. Sun , Q. Wang , Z. Ouyang , and Y. Yang
A modified Priestley-Taylor (P-T) equation was proposed by Venturini et al. (2008) to map actual evapotranspiration (ET) based solely on satellite remote sensing data, involving a parameter based on a scaled temperature between dew point temperature and surface temperature. In this study, however, theoretical analyses and field experimental evidence show that it is hard to obtain this scaled temperature using dew point temperature and surface temperature. This study also presents a new parameterization method using air temperature, surface temperature, and surface temperature of a reference dry surface. The actual ET estimates obtained by means of our proposed parameterization method are validated at a site scale, and a case study is conducted to map actual ET from Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) images using our proposed method. Results of ground-based validation and a case study of mapping ET using ASTER images indicate that the improvement on the modified P-T equation proposed by Venturini et al. (2008) can contribute to generating reliable actual ET.
Received: 07 Feb 2012 – Discussion started: 12 Mar 2012
Z. Sun , Q. Wang , Z. Ouyang , and Y. Yang
Status: closed
Status: closed
AC : Author comment | RC : Referee comment | SC : Short comment | EC : Editor comment
- Printer-friendly version
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Status: closed
Status: closed
AC : Author comment | RC : Referee comment | SC : Short comment | EC : Editor comment
- Printer-friendly version
- Supplement
Z. Sun , Q. Wang , Z. Ouyang , and Y. Yang
Z. Sun , Q. Wang , Z. Ouyang , and Y. Yang
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