Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 16
Articles | Volume 30, issue 16
https://doi.org/10.5194/hess-30-5215-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-5215-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 16
Research article
 | 
19 Aug 2026
Research article |  | 19 Aug 2026

Progressive groundwater decoupling may drive a shift toward shallower and faster terrestrial water cycling

Aoqi Sun, Wenjie Xu, Enze Ma, Hua Yuan, and Chen Yang

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Short summary
Groundwater is often viewed as a hidden reserve that supports evapotranspiration and streamflow during dry periods. We show that sustained warming and greening can weaken this buffering role. As groundwater levels decline, links between shallow and deeper stores reorganize, reducing older groundwater inputs to streams and evapotranspiration. Over time, water cycling shifts toward shallower, faster pathways, potentially lowering system resilience and predictability under long-term climate stress.
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