Preprints
https://doi.org/10.5194/essd-2020-323
https://doi.org/10.5194/essd-2020-323

  11 Jan 2021

11 Jan 2021

Review status: a revised version of this preprint is currently under review for the journal ESSD.

Long term variations of actual evapotranspiration over the Tibetan Plateau

Cunbo Han1,2, Yaoming Ma1,3,4,5, Binbin Wang1, Lei Zhong6, Weiqiang Ma1,3, Xuelong Chen1,3, and Zhongbo Su7 Cunbo Han et al.
  • 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

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/).

Cunbo Han et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2020-323', Anonymous Referee #1, 10 Feb 2021
    • AC1: 'Reply on RC1', Cunbo Han, 06 Apr 2021
  • RC2: 'Comment on essd-2020-323', Massimo Menenti, 21 Mar 2021
    • AC2: 'Reply on RC2', Cunbo Han, 06 Apr 2021

Cunbo Han et al.

Data sets

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 2018 Han, 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.

Viewed

Total article views: 529 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
392 122 15 529 6 9
  • HTML: 392
  • PDF: 122
  • XML: 15
  • Total: 529
  • BibTeX: 6
  • EndNote: 9
Views and downloads (calculated since 11 Jan 2021)
Cumulative views and downloads (calculated since 11 Jan 2021)

Viewed (geographical distribution)

Total article views: 432 (including HTML, PDF, and XML) Thereof 432 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 11 Apr 2021
Download
Short summary
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.