Yin et al. (2025) Distinct Eurasian Teleconnection Wave Trains Contributing to the Intraseasonal Variations of East Asian Jet Streams

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

Identification

• Journal: Journal of Geophysical Research Atmospheres
• Year: 2025
• Date: 2025-10-08
• Authors: Jingnan Yin, Daokai Xue, Yaocun Zhang, Dan Wang, Qian Liu, Huan Mei, Bin Wang, Xiangbai Wu
• DOI: 10.1029/2024jd042450

Research Groups

Not specified in abstract.

Short Summary

This study reveals that intraseasonal variations of East Asian polar-front and subtropical jets are preceded by Eurasian wave trains originating from the Iceland and Norwegian Sea, with Atlantic Sea Surface Temperature (SST) anomalies playing a crucial role in stimulating these upstream Rossby wave sources.

Objective

• To further illustrate the propagation characteristics and dynamic effects of Eurasian wave trains on East Asian jet variations on an intraseasonal time scale.

Study Configuration

• Spatial Scale: Eurasian region, East Asia, Iceland and Norwegian Sea, Atlantic.
• Temporal Scale: Intraseasonal time scale (1 to 3 days lead time for wave patterns).

Methodology and Data

• Models used: Not specified in abstract.
• Data sources: Not specified in abstract.

Main Results

• Intraseasonal variations of East Asian polar-front and subtropical jets, characterized by concurrent intensity and location changes, are preceded by Eurasian wave trains originating from the Iceland and Norwegian Sea.
• The conventional Eurasian pattern (EU) leads jet variations by 1 day, while the Scandinavian pattern (SCAND) leads by 2 to 3 days.
• These wave trains facilitate more organized wave structures, spread local oscillations in East Asia to trans-Eurasian circulation realignment, and amplify jet variabilities.
• Atlantic SST anomalies are important in stimulating upstream Rossby wave sources of different teleconnection wave trains through inducing descending motions and convergence anomalies in the upper troposphere.

Contributions

• Provides further illustration of the propagation characteristics and dynamic effects of Eurasian wave trains on East Asian jet variations.
• Quantifies the lead times of conventional Eurasian and Scandinavian patterns in influencing jet variability.
• Identifies the role of Atlantic SST anomalies in stimulating the upstream Rossby wave sources for these teleconnection patterns.

Funding

Not specified in abstract.

Citation

@article{Yin2025Distinct,
  author = {Yin, Jingnan and Xue, Daokai and Zhang, Yaocun and Wang, Dan and Liu, Qian and Mei, Huan and Wang, Bin and Wu, Xiangbai},
  title = {Distinct Eurasian Teleconnection Wave Trains Contributing to the Intraseasonal Variations of East Asian Jet Streams},
  journal = {Journal of Geophysical Research Atmospheres},
  year = {2025},
  doi = {10.1029/2024jd042450},
  url = {https://doi.org/10.1029/2024jd042450}
}