Han et al. (2025) Connection of Autumn North Asian Snow With Mid‐Winter Tibetan Plateau Snow

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

Identification

• Journal: Geophysical Research Letters
• Year: 2025
• Date: 2025-10-25
• Authors: Shuangze Han, Hong‐Li Ren, Jianqi Sun, Baohuang Su, Mengqi Zhang
• DOI: 10.1029/2025gl118606

Research Groups

Not explicitly mentioned in the abstract.

Short Summary

This study detects a teleconnection where excessive October-November North Asian snow leads to a weakened stratospheric polar vortex, which subsequently causes an anomalous anticyclone over the Tibetan Plateau, resulting in decreased January snowfall and snow depth.

Objective

• To detect the potential link of Eurasian snow with Tibetan Plateau (TP) snow variability.

Study Configuration

• Spatial Scale: Eurasian continent, North Asia, Arctic, Tibetan Plateau (regional to continental scale).
• Temporal Scale: October–November (ON), boreal winter, January (seasonal to monthly scale).

Methodology and Data

• Models used: Not explicitly mentioned in the abstract (describes a physical mechanism).
• Data sources: Not explicitly mentioned in the abstract (implies analysis of atmospheric and snow cover data).

Main Results

• Excessive October–November (ON) North Asian snow cover boosts upward wave activity, leading to heating of the stratospheric polar atmosphere.
• This heating subsequently gives rise to an attenuated stratospheric polar vortex (SPV).
• The downward propagation of this SPV anomaly during boreal winter induces an anomalous horizontal wave train in the middle troposphere.
• This wave train generates an anomalous anticyclone around the Tibetan Plateau (TP).
• The anomalous anticyclone facilitates decreased local snowfall and snow depth in January.
• These processes indicate a mid-latitude Asia–Arctic–TP connection via vertical and horizontal wave activity.
• The identified connection effectively supplies a predictive indicator for mid-winter TP snow depth.

Contributions

• Identifies a novel teleconnection pathway linking mid-latitude Eurasian snow to Tibetan Plateau snow variability.
• Highlights the role of stratosphere-troposphere coupling and vertical/horizontal wave activity in this teleconnection.
• Provides a potential predictive indicator for mid-winter Tibetan Plateau snow depth.

Funding

Not explicitly mentioned in the abstract.

Citation

@article{Han2025Connection,
  author = {Han, Shuangze and Ren, Hong‐Li and Sun, Jianqi and Su, Baohuang and Zhang, Mengqi},
  title = {Connection of Autumn North Asian Snow With Mid‐Winter Tibetan Plateau Snow},
  journal = {Geophysical Research Letters},
  year = {2025},
  doi = {10.1029/2025gl118606},
  url = {https://doi.org/10.1029/2025gl118606}
}