Significantly increased evapotranspiration reveals accelerated water cycle on the Tibetan Plateau during 1982–2018

Significantly increased evapotranspiration reveals accelerated water cycle on the Tibetan Plateau during 1982–2018


Previous studies suggest an accelerated water cycle over the Tibetan Plateau (TP) in recent decades, mainly based on observed precipitation. However, the exact changes to evapotranspiration (ETa) over this period remain largely unknown. Although multiple ETa products for the TP region report that ETa experienced a significant increasing trend of around 8.4 ± 2.2 mm/10 a during 1982–2018, there exist large uncertainties in the annual ETa estimates over different climate zones. Here, we quantified and explained the ETa trend using a comprehensive process-based ETa model refined on ground-based observations from nine stations over the TP. Attribution analysis revealed that a large part of the increasing ETa trend was caused by higher temperature (53.8%) and more soil moisture (23.1%) caused by the melting cryosphere and increased precipitation. The increasing rate of ETa on the TP was approximately twice that of the global ETa, providing strong and independent evidence for an accelerated hydrological cycle. The dominant role of increased temperature in ETa implies a continued acceleration of the water cycle in the future.

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袁令. (2021). Significantly increased evapotranspiration reveals accelerated water cycle on the Tibetan Plateau during 1982–2018. 国家青藏高原科学数据中心, 2021. doi: 10.11888/Terre.tpdc.271913.
[Yuan, L. (2021). Significantly increased evapotranspiration reveals accelerated water cycle on the Tibetan Plateau during 1982–2018. National Tibetan Plateau Data Center, 2021]

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License: This work is licensed under an Attribution 4.0 International (CC BY 4.0)



资助项目

国家自然科学基金

第二次青藏高原综合科学考察研究

the Strategic Priority Research Program of Chinese Academy of Sciences

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关注
关键词
空间位置
East: 106.00 West: 73.00
South: 24.00 North: 42.00
数据细节
  • 时间分辨率:Monthly
  • 空间分辨率:1km - 10km
  • 大小:115.0 MB
  • 浏览:25 次
  • 下载量:7 次
  • 数据时间范围:1982-01-01 至 2018-12-31
  • 共享方式: 开放获取
  • 元数据更新时间:2021-12-23
联系信息

袁令

分发方: 时空三极环境大数据平台

Email: poles@itpcas.ac.cn

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