Groundwater Rise Sustains the World's Largest Alpine Water System Under Global Warming
8 affiliations
- 1National Field Observation and Research Station (Beijing Yanshan) for Earth Critical Zone University of Chinese Academy of Sciences Beijing China
- 2State Key Laboratory of Earth System Numerical Modeling and Application Chinese Academy of Sciences Beijing China
- 3College of Resources and Environment University of Chinese Academy of Sciences Beijing China
- 4College of Life Sciences University of Chinese Academy of Sciences Beijing China
- 5Development and Research Center China Geological Survey Beijing China
- 6School of Grassland Science Beijing Forestry University Beijing China
- 7State Key Laboratory of Plateau Ecology and Agriculture Qinghai University Qinghai China
- 8State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing China
Abstract
Shallow groundwater dynamics on the Qinghai–Xizang Plateau (QXP)−the “Asian water tower” supplying freshwater to billions downstream−remain poorly understood despite their critical role in buffering climate impacts. Integrating more than 8000 in‐situ groundwater records with multi‐source remote sensing data, we present the first high‐resolution assessment of shallow groundwater across the QXP's non‐permafrost plains. From 2000 to 2020, groundwater depth has been decreasing at a rate of 0.02 m year− 1, adding approximately 31.44 Gt (Gigatons) of freshwater storage−directly countering the prevailing narrative of widespread water loss. By combining the maximum capillary rise height, this rise sustains ∼53 500 km2 of alpine ecosystems and is closely linked to increasing NDVI in emerging groundwater‐dependent vegetation. These results reveal the possibility of ecosystem regime shift under shrinking groundwater depth, highlighting the importance of groundwater dynamics in understanding alpine ecosystem changes. With an estimated 426.6 Gt of remaining storage capacity in the vadose zone, we identify managed underground reservoirs as a promising but still prospective opportunity for climate adaptation. Our findings reveal that the QXP's shallow aquifers function as a dynamic, growing freshwater reservoir, challenging surface‐water‐centric views of water‐tower vulnerability and suggesting that current studies may underestimate the resilience plateau's water system to ongoing global warming.
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BibTeX
@article{du2026groundwater,
title = {{Groundwater Rise Sustains the World's Largest Alpine Water System Under Global Warming}},
author = {Jianqing Du and Zhixiang Niu and Yanfen Wang and Shirui Zhou and Youqing Yang and Xiang Wei and Haishan Niu and Yitao Zhang and Anquan Xia and Yali Liu and Yanbin Hao and Kai Xue and Bingfang Wu and Xinquan Zhao and Tandong Yao and Yiyu Chen},
journal = {Advanced Science},
year = {2026},
month = aug,
doi = {10.1002/advs.76957},
url = {https://doi.org/10.1002/advs.76957},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Groundwater Rise Sustains the World's Largest Alpine Water System Under Global Warming
AU - Jianqing Du
AU - Zhixiang Niu
AU - Yanfen Wang
AU - Shirui Zhou
AU - Youqing Yang
AU - Xiang Wei
AU - Haishan Niu
AU - Yitao Zhang
AU - Anquan Xia
AU - Yali Liu
AU - Yanbin Hao
AU - Kai Xue
AU - Bingfang Wu
AU - Xinquan Zhao
AU - Tandong Yao
AU - Yiyu Chen
PY - 2026
DA - 2026/08/05
JO - Advanced Science
DO - 10.1002/advs.76957
UR - https://doi.org/10.1002/advs.76957
AB - Shallow groundwater dynamics on the Qinghai–Xizang Plateau (QXP)−the “Asian water tower” supplying freshwater to billions downstream−remain poorly understood despite their critical role in buffering climate impacts. Integrating more than 8000 in‐situ groundwater records with multi‐source remote sensing data, we present the first high‐resolution assessment of shallow groundwater across the QXP's non‐permafrost plains. From 2000 to 2020, groundwater depth has been decreasing at a rate of 0.02 m year− 1, adding approximately 31.44 Gt (Gigatons) of freshwater storage−directly countering the prevailing narrative of widespread water loss. By combining the maximum capillary rise height, this rise sustains ∼53 500 km2 of alpine ecosystems and is closely linked to increasing NDVI in emerging groundwater‐dependent vegetation. These results reveal the possibility of ecosystem regime shift under shrinking groundwater depth, highlighting the importance of groundwater dynamics in understanding alpine ecosystem changes. With an estimated 426.6 Gt of remaining storage capacity in the vadose zone, we identify managed underground reservoirs as a promising but still prospective opportunity for climate adaptation. Our findings reveal that the QXP's shallow aquifers function as a dynamic, growing freshwater reservoir, challenging surface‐water‐centric views of water‐tower vulnerability and suggesting that current studies may underestimate the resilience plateau's water system to ongoing global warming.
SN - 2198-3844
ER -