Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 12
Articles | Volume 30, issue 12
https://doi.org/10.5194/hess-30-3825-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-3825-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 12
Research article
 | 
24 Jun 2026
Research article |  | 24 Jun 2026

Scale-dependent transition in soil moisture memory and its environmental controls in complex mountain terrain

Jun Zhang, Songtang He, Yong Li, and Yuan Xue

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Short summary
To better predict mountain hazards like landslides, we studied how long soil retains rain moisture. Using 20 years of satellite data from China, we found a control shift at about five years. Short-term memory is governed by weather and plants, while long-term persistence is locked in by soil and terrain. This creates a lasting "background" wetness, especially in humid forests, pre-conditioning slopes for years.
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