Zhao et al. (2026) Asynchronous Emergence of Water Scarcity Risks Amid Shifting Hydrological Regimes in High Mountain Asia

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Earth s Future
• Year: 2026
• Date: 2026-07-01
• Authors: Ruiying Zhao, Yuheng Yang
• DOI: 10.1029/2026ef008373

Research Groups

• Hydrology Department, University of Colorado Boulder
• Climate Modeling Branch, NASA Goddard Space Flight Center
• Water Security Group, University of Oxford

Short Summary

This study uses a distributed hydrological model to quantify the contributions and future changes of individual runoff components in High Mountain Asia, highlighting the importance of groundwater storage and routing pathways. The analysis reveals a mid-century turning point around 2060 when population exposed to water scarcity reaches 1.04–1.51 billion.

Objective

• Investigate the individual contributions and future changes of runoff components (groundwater, glacier melt, snowmelt) in High Mountain Asia

Study Configuration

• Spatial Scale: 12 major basins across High Mountain Asia
• Temporal Scale: Historical period (1980s-2010s), near-future (2020s-2050s), and late-century (2060s-2100s)

Methodology and Data

• Models used: Distributed hydrological model constrained by multisource observations
• Data sources: Satellite, observation, reanalysis datasets

Main Results

• Groundwater accounts for 15.07% of total runoff, exceeding the combined contribution of glacier melt (5.60%) and snowmelt (4.46%)
• Anthropogenic aerosols exhibit a strong negative influence on runoff changes, offsetting greenhouse-gas-driven wetting in arid northwest regions

Contributions

• Provides the first explicit quantification of individual runoff components and their future changes in High Mountain Asia
• Highlights the critical role of groundwater storage and routing pathways in hydrological processes

Funding

• NASA's Terrestrial Hydrology Program (NNH19ZDA001N)
• National Science Foundation's Water, Sustainability, and Climate Change program (EAR-1936615)

Citation

@article{Zhao2026Asynchronous,
  author = {Zhao, Ruiying and Yang, Yuheng},
  title = {Asynchronous Emergence of Water Scarcity Risks Amid Shifting Hydrological Regimes in High Mountain Asia},
  journal = {Earth s Future},
  year = {2026},
  doi = {10.1029/2026ef008373},
  url = {https://doi.org/10.1029/2026ef008373}
}