Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 15
Articles | Volume 30, issue 15
https://doi.org/10.5194/hess-30-4985-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-4985-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 15
Research article
 | 
10 Aug 2026
Research article |  | 10 Aug 2026

Declining Sensitivity and Increasing Resistance Time of Ecosystem Water Use Efficiency to Meteorological Drought

Zijun Wang, Rong Wu, Yangyang Liu, Zhaoying Zhang, Zhongming Wen, Zhenqian Wang, Stephen Sitch, and Wenping Yuan

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Short summary
The coupling between water use efficiency (WUE) and drought remains unclear. This study first incorporates the optimal drought timescale at which WUE responds to drought. The results show that optimal drought timescale has gradually lengthened, indicating a weakening WUE-drought coupling, mainly driven by CO₂ fertilization, with surface soil moisture as the most important hydrothermal factor. This study provides new insights into assessing WUE responses to drought.
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