Chen et al. (2026) A Subtle Atmospheric Shift Is Redefining Winter Hydrology on the Tibetan Plateau

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

Identification

• Journal: Geophysical Research Letters
• Year: 2026
• Date: 2026-08-23
• Authors: Hao Chen, Xianhong Meng, Shih‐Yu Wang, Yaling Chen, Lin Zhao, Lele Shu, Mingshan Deng, Zhaoguo Li, Chenghai Wang
• DOI: 10.1029/2025gl121477

Research Groups

• Institute of Tibetan Plateau Research, Chinese Academy of Sciences
• Department of Earth System Science, University of California, Irvine

Short Summary

This study reveals a weakening of the Tibetan Plateau's buffering function in regulating downstream water supply due to a shift in winter climate regimes. The region is experiencing an increase in warm-dry winters, leading to reduced snow depth and altered hydrology.

Objective

• Investigate changes in winter climate regimes over the Sanjiangyuan region and their impact on regional hydrology

Study Configuration

• Spatial Scale: Regional (Sanjiangyuan region, Tibetan Plateau)
• Temporal Scale: Decadal (early 2000s to present)

Methodology and Data

• Models used: Standardized temperature–precipitation anomaly classification, circulation composites, water-vapor transport diagnostics
• Data sources: Hydroclimatic observations, satellite data

Main Results

• Shift from cold-dry and cold-wet winters toward warm-dominated regimes since the early 2000s
• Increase in warm-dry events with strongest increase among all winter types
• Reduced snow depth, soil moisture depletion, and suppressed or redistributed runoff associated with warm-dry winters

Contributions

• Provides new insights into the impact of climate regime shifts on regional hydrology
• Highlights the importance of considering compound extremes in understanding changes in water supply regulation

Funding

• National Natural Science Foundation of China (Grant No. 41730532)
• NASA's Terrestrial Hydrology Program (Grant No. NNX13AP19G)

Citation

@article{Chen2026Subtle,
  author = {Chen, Hao and Meng, Xianhong and Wang, Shih‐Yu and Chen, Yaling and Zhao, Lin and Shu, Lele and Deng, Mingshan and Li, Zhaoguo and Wang, Chenghai},
  title = {A Subtle Atmospheric Shift Is Redefining Winter Hydrology on the Tibetan Plateau},
  journal = {Geophysical Research Letters},
  year = {2026},
  doi = {10.1029/2025gl121477},
  url = {https://doi.org/10.1029/2025gl121477}
}