A doubled increasing trend of evapotranspiration on the Tibetan Plateau

Xuelong Chen ¹Ling Yuan ²Yaoming Ma ³Deliang Chen ⁴Zhongbo Su ⁵Dianbin Cao¹

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作者信息

1. Land-Atmosphere Interaction and Its Climatic Effects Group,State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China
2. Land-Atmosphere Interaction and Its Climatic Effects Group,State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China
3. Land-Atmosphere Interaction and Its Climatic Effects Group,State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Atmospheric Science,Lanzhou University,Lanzhou 730000,China;National Observation and Research Station for Qomolongma Special Atmospheric Processes and Environmental Changes,Dingri 858200,China;Kathmandu Ce
4. Regional Climate Group,Department of Earth Science,University of Gothenburg,Gothenburg 405 30,Sweden
5. Faculty of Geo-Information Science and Earth Observation,University of Twente,Enschede 7500AE,the Netherlands;School of Environmental Science and Engineering,Chang'an University,Xi'an 710064,China
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Abstract

Estimation of evapotranspiration(ETa)change on the Tibetan Plateau(TP)is essential to address the water requirement of billions of people surrounding the TP.Existing studies have shown that ETa estimations on the TP have a very large uncertainty.In this article,we discuss how to more accurately quantify ETa amount and explain its change on the TP.ETa change on the TP can be quantified and explained based on an ensem-ble mean product from climate model simulations,reanalysis,as well as ground-based and satellite obser-vations.ETa on the TP experienced a significant increasing trend of around 8.4±2.2 mm(10 a)-1(mean±one standard deviation)during 1982-2018,approximately twice the rate of the global land ETa(4.3±2.1 mm(10 a)-1).Numerical attribution analysis revealed that a 53.8％TP area with the increased ETa was caused by increased temperature and 23.1％part was due to soil moisture rising,because of the warming,melting cryosphere,and increased precipitation.The projected future increase in ETa is expected to cause a continued acceleration of the water cycle until 2100.

Key words

Evapotranspiration/Global warming/Water cycle/Tibetan Plateau

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基金项目

Second Tibetan Plateau Scientific Expedition and Research(STEP)Program(2019QZKK0103)

Second Tibetan Plateau Scientific Expedition and Research(STEP)Program(2019QZKK0105)

National Natural Science Foundation of China(41975009)

National Natural Science Foundation of China(42230610)

Swedish Research Council VR(2021-02163)

Swedish Research Council VR(2022-06011)

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

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