谭哲兴 et al. (2026) Winter Extreme Precipitation Over the Western Tibetan Plateau: Circulation Patterns and Underlying Mechanisms

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Identification

• Journal: International Journal of Climatology
• Year: 2026
• Date: 2026-06-15
• Authors: 谭哲兴, Ji Ma, Hui Li, Zhongshi Zhang, Yong Liu
• DOI: 10.1002/joc.70466

Research Groups

Not specified in the provided text.

Short Summary

This study identifies three distinct weather regimes associated with regional extreme precipitation events (REPEs) over the western Tibetan Plateau, all of which are driven by Western disturbances (WDs) and modulated by global teleconnections.

Objective

• To categorize and understand the weather regimes and atmospheric mechanisms that trigger regional extreme precipitation events (REPEs) over the western Tibetan Plateau during winter.

Study Configuration

• Spatial Scale: Western Tibetan Plateau (TP), including the Pamir Plateau, southern Himalayan slopes, northern Pakistan, and the Hindu Kush.
• Temporal Scale: Winter season.

Methodology and Data

• Models used: Self-organising map (SOM).
• Data sources: Not explicitly specified in the provided text.

Main Results

• Identified three primary weather regimes for REPEs:
  1. Southwest–northeast cyclone–anticyclone dipole: Increases precipitation over the Pamir Plateau and southern Himalayan slopes.
  2. Dominant anticyclone over the TP: Produces a zonally extended precipitation belt from northern Pakistan to the Hindu Kush.
  3. Intensified cyclonic circulation west of the TP: Leads to intense precipitation along the southern Himalayas.
• Established that all REPEs are accompanied by at least one Western disturbance (WD), with trajectories and genesis governed by wave energy propagation and subtropical jet variations.
• Found that while ENSO, the MJO, and the NAO modulate WD dynamics and moisture supply, no single teleconnection pattern exerts dominant control over any one specific weather regime.

Contributions

• Provides a new classification of weather regimes for extreme winter precipitation in the western TP.
• Clarifies the relationship between Western disturbances, subtropical jet variations, and global teleconnections in driving regional extreme precipitation.

Funding

Not specified in the provided text.

Citation

@article{谭哲兴2026Winter,
  author = {谭哲兴 and Ma, Ji and Li, Hui and Zhang, Zhongshi and Liu, Yong},
  title = {Winter Extreme Precipitation Over the Western Tibetan Plateau: Circulation Patterns and Underlying Mechanisms},
  journal = {International Journal of Climatology},
  year = {2026},
  doi = {10.1002/joc.70466},
  url = {https://doi.org/10.1002/joc.70466}
}