Further evaluation of the Sim-ReSET model for ET estimation driven by only satellite inputs |
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Authors: | Zhigang Sun Qinxue Wang Bunkei Matsushita Takehiko Fukushima Zhu Ouyang Masataka Watanabe |
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Institution: | 1. National Institute for Environmental Studies, 16-2 Onogawa , Tsukuba , Ibaraki , 305-8506 , Japan E-mail: wangqx@nies.go.jp;2. Graduate School of Life and Environmental Sciences, University of Tsukuba , Tsukuba , Ibaraki , 305-8572 , Japan;3. Institute of Geographical Sciences and Natural Resource Research, Chinese Academy of Sciences , Chaoyang District , Beijing , 100101 , China;4. Faculty of Environmental Information, Keio University, 5522 Endo , Fujisawa , Kanagawa , 252-8520 , Japan |
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Abstract: | Abstract A simple remote sensing evapotranspiration (ET) model (Sim-ReSET) has been proposed but only tested using field measurements at a site with a semi-arid climate. Its performance for mapping ET using only satellite data remained unknown. In this study, the Sim-ReSET model was further evaluated for ET estimation driven by only MODIS data products. The estimated ET rates were compared with ground-based observational data from a variety of ecosystems and climates across China. The results show that MODIS-based ET estimates are consistent with both the ET measurements from eddy covariance flux towers and those from the Penman-Monteith method combined with micrometeorological data. Evaporation fraction (EF) is indicative of land surface moisture. The derivative EF maps demonstrate that the proposed ET data set obtained from the Sim-ReSET model and MODIS data is capable of capturing the spatio-temporal pattern of land surface moisture for different land covers with different climates. Editor Z.W. Kundzewicz Citation Sun, Z.G., Wang, Q.X., Matsushita, B., Fukushima, T., Ouyang, Z., Watanabe, M., and Gebremichael, M., 2013. Further evaluation of the Sim-ReSET model for ET estimation driven by only satellite inputs. Hydrological Sciences Journal, 58 (5), 994–1012. |
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Keywords: | evapotranspiration evaporation fraction Sim-ReSET MODIS |
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