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Comparison of satellite-based evapotranspiration estimates over the Tibetan Plateau
Peng, J (Peng, Jian)1; Loew, A (Loew, Alexander)1,5; Chen, XL (Chen, Xuelong)2; Ma, YM (Ma, Yaoming)3,4; Su, ZB (Su, Zhongbo)2; Peng, J
AbstractThe Tibetan Plateau (TP) plays a major role in regional and global climate. The understanding of latent heat (LE) flux can help to better describe the complex mechanisms and interactions between land and atmosphere. Despite its importance, accurate estimation of evapotranspiration (ET) over the TP remains challenging. Satellite observations allow for ET estimation at high temporal and spatial scales. The purpose of this paper is to provide a detailed cross-comparison of existing ET products over the TP. Six available ET products based on different approaches are included for comparison. Results show that all products capture the seasonal variability well with minimum ET in the winter and maximum ET in the summer. Regarding the spatial pattern, the High resOlution Land Atmosphere surface Parameters from Space (HOLAPS) ET demonstrator dataset is very similar to the LandFlux-EVAL dataset (a benchmark ET product from the Global Energy and Water Cycle Experiment), with decreasing ET from the south-east to northwest over the TP. Further comparison against the LandFlux-EVAL over different sub-regions that are decided by different intervals of normalised difference vegetation index (NDVI), precipitation, and elevation reveals that HOLAPS agrees best with LandFlux-EVAL having the highest correlation coefficient (R) and the lowest root mean square difference (RMSD). These results indicate the potential for the application of the HOLAPS demonstrator dataset in understanding the land-atmosphere-biosphere interactions over the TP. In order to provide more accurate ET over the TP, model calibration, high accuracy forcing dataset, appropriate in situ measurements as well as other hydrological data such as runoff measurements are still needed.
Subject Area自然地理学
WOS IDWOS:000383135900001
Indexed BySCI
KeywordSurface-energy-balance Global Terrestrial Evapotranspiration Thewacmos-et Project Modis Toa Radiances Remote-sensing Data In-situ Data Heterogeneous Landscape Land Evapotranspiration Climate-change Heat Fluxes
Cooperation Status国际
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Document Type期刊论文
Corresponding AuthorPeng, J
Affiliation1.Max Planck Inst Meteorol, D-20146 Hamburg, Germany
2.Univ Twente, Fac Geoinformat Sci & Earth Observat, NL-7500 AE Enschede, Netherlands
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Univ Munich, Dept Geog, D-80333 Munich, Germany
Recommended Citation
GB/T 7714
Peng, J ,Loew, A ,Chen, XL ,et al. Comparison of satellite-based evapotranspiration estimates over the Tibetan Plateau[J]. HYDROLOGY AND EARTH SYSTEM SCIENCES,2016,20(8):3167-3182.
APA Peng, J ,Loew, A ,Chen, XL ,Ma, YM ,Su, ZB ,&Peng, J.(2016).Comparison of satellite-based evapotranspiration estimates over the Tibetan Plateau.HYDROLOGY AND EARTH SYSTEM SCIENCES,20(8),3167-3182.
MLA Peng, J ,et al."Comparison of satellite-based evapotranspiration estimates over the Tibetan Plateau".HYDROLOGY AND EARTH SYSTEM SCIENCES 20.8(2016):3167-3182.
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