1Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
2Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
3CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China
4University of Chinese Academy of Sciences, Beijing, China
5Lanzhou University, Lanzhou, China
6Laboratory for Atmospheric Observation and Climate Environment Research, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China
7Faculty of Geo-Information Science and Earth Observation, University of Twente, Enschede, The Netherlands
1Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
2Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
3CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China
4University of Chinese Academy of Sciences, Beijing, China
5Lanzhou University, Lanzhou, China
6Laboratory for Atmospheric Observation and Climate Environment Research, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China
7Faculty of Geo-Information Science and Earth Observation, University of Twente, Enschede, The Netherlands
Received: 30 Oct 2020 – Accepted for review: 09 Jan 2021 – Discussion started: 11 Jan 2021
Abstract. Terrestrial actual evapotranspiration (ETa) is a key parameter controlling the land-atmosphere interaction processes and the water cycle. However, the spatial distribution and temporal changes of ETa over the Tibetan Plateau (TP) remain very uncertain. Here we estimate the multiyear (2001–2018) monthly ETa and its spatial distribution on the TP by a combination of meteorological data and satellite products. Validation against data from six eddy-covariance monitoring sites yielded a root mean square errors ranging from 9.3 to 14.5 mm mo−1, and correlation coefficients exceeding 0.9. The domain mean of annual ETa on the TP decreased slightly (−1.45 mm yr−1, p < 0.05) from 2001 to 2018. The annual ETa increased significantly at a rate of 2.62 mm yr−1 (p < 0.05) in the eastern sector of the TP (lon > 90° E), but decreased significantly at a rate of −5.52 mm yr−1 (p < 0.05) in the western sector of the TP (lon < 90° E). In addition, the decreases in annual ETa were pronounced in the spring and summer seasons, while almost no trends were detected in the autumn and winter seasons. The mean annual ETa during 2001–2018 and over the whole TP was 496 ± 23 mm. Thus, the total evapotranspiration from the terrestrial surface of the TP was 1238.3 ± 57.6 km3 yr−1. The estimated ETa product presented in this study is useful for an improved understanding of changes in the energy and water cycle on the TP. The dataset is freely available at the Science Data Bank (http://www.dx.doi.org/10.11922/sciencedb.t00000.00010, (Han et al. 2020)) and at the National Tibetan Plateau Data Center (https://data.tpdc.ac.cn/en/data/5a0d2e28-ebc6-4ea4-8ce4-a7f2897c8ee6/).
Monthly mean evapotranspiration data set of the Tibet Plateau (2001-2018)Han, Cunbo, Ma, Yaoming, Wang, Binbin, Zhong, Lei, Ma, Weiqiang, Chen, Xuelong, and Su, Zhongbo https://doi.org/10.11888/Hydro.tpdc.270995
The estimated actual evapotranspiration over the Tibetan Plateau from 2001 to 2018Han, Cunbo, Ma, Yaoming, Wang, Binbin, Zhong, Lei, Ma, Weiqiang, Chen, Xuelong, and Su, Zhongbo https://doi.org/10.11922/sciencedb.t00000.00010
Cunbo Han et al.
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Terrestrial actual evapotranspiration (ETa) is a key parameter controlling the land-atmosphere interaction processes and the water cycle. However, the spatial distribution and temporal changes of ETa over the Tibetan Plateau remain very uncertain. Here we estimate the multiyear (2001–2018) monthly ETa and its spatial distribution on the TP by a combination of meteorological data and satellite products. Results have been validated at six eddy-covariance monitoring sites and show high accuracy.
Terrestrial actual evapotranspiration (ETa) is a key parameter controlling the land-atmosphere...