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Long-term variations in actual evapotranspiration over the Tibetan Plateau

Han, Cunbo 1; Ma, Yaoming; Wang, Binbin; Zhong, Lei; Ma, Weiqiang; Chen, Xuelong; Su, Zhongbo
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)


Actual terrestrial evapotranspiration (ET$_{a}$) is a key parameter controlling land–atmosphere interaction processes and water cycle. However, spatial distribution and temporal changes in ET$_{a}$ over the Tibetan Plateau (TP) remain very uncertain. Here we estimate the multiyear (2001–2018) monthly ET$_{a}$ 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 root-mean-square errors ranging from 9.3 to 14.5 mm per month and correlation coefficients exceeding 0.9. The domain mean of annual ET$_{a}$ on the TP decreased slightly (−1.45 mm yr$^{-1}$, p<0.05) from 2001 to 2018. The annual ET$_{a}$ increased significantly at a rate of 2.62 mm yr$^{-1}$ (p<0.05) in the eastern sector of the TP (long >90° E) but decreased significantly at a rate of −5.52 mm yr$^{-1}$ (p<0.05) in the western sector of the TP (long <90° E). In addition, the decreases in annual ET$_{a}$ were pronounced in the spring and summer seasons, while almost no trends were detected in the autumn and winter seasons. The mean annual ET$_{a}$ during 2001–2018 and over the whole TP was 496±23 mm. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000137907
Veröffentlicht am 23.09.2021
DOI: 10.5194/essd-13-3513-2021
Zitationen: 29
Web of Science
Zitationen: 22
Zitationen: 34
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1866-3516
KITopen-ID: 1000137907
HGF-Programm 12.11.26 (POF IV, LK 01) Aerosol-Cloud-Climate-Interaction
Erschienen in Earth system science data
Verlag Copernicus Publications
Band 13
Heft 7
Seiten 3513–3524
Vorab online veröffentlicht am 19.07.2021
Nachgewiesen in Web of Science
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