XUE et al. (2025) The Linkage between the Extreme Cold Air Outbreaks and Rossby Wave Breaking over East Asia

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

Identification

• Journal: Journal of Climate
• Year: 2025
• Date: 2025-07-24
• Authors: Shu-Hang XUE, Jeffrey M. Chagnon, Mark A. Bourassa
• DOI: 10.1175/jcli-d-25-0078.1

Research Groups

Not specified in the provided text.

Short Summary

This study diagnostically investigates the relationship between Rossby wave breaking (RWB) and extreme East Asian cold air outbreaks (CAOs), revealing that western and eastern CAOs are driven by distinct wave evolution patterns and regional RWB activities.

Objective

• To analyze the connection between Rossby wave breaking (RWB) and the occurrence and intensity of extreme East Asian cold air outbreaks (CAOs).

Study Configuration

• Spatial Scale: Regional (East Asia) to Global (from southeastern North America to the North Pacific).
• Temporal Scale: Not explicitly stated, though lead times for precursors are identified at 3 and 6 days.

Methodology and Data

• Models used: Not specified (Diagnostic analysis).
• Data sources: Not specified (Analysis based on cold air mass flux below the 280 K isentropic surface and RWB breaking extent).

Main Results

• WCAO Characteristics: Extreme western CAOs (WCAOs) are associated with increased anticyclonic wave breaking (AWB) upstream (region 1) and cyclonic wave breaking (CWB) downstream (regions 3 and 4). They are driven by inverted omega-shaped circulations originating from a localized wave train over central Russia.
• ECAO Characteristics: Extreme eastern CAOs (ECAOs) are linked to increased upstream AWB (region 1) and reduced midstream CWB (region 3) prior to onset. They are driven by a global wave train extending from southeastern North America to the North Pacific.
• Temporal Precursors: ECAOs are preceded by AWBs in region 1 approximately 3 days prior, or by CWBs in region 3 approximately 6 days prior.
• Reciprocity: A reciprocal relationship exists between the strength of cold air flux and the occurrence of RWB in specific regions.

Contributions

The study provides a diagnostic framework to differentiate between Western and Eastern CAOs by linking them to specific Rossby wave breaking archetypes and distinct wave train origins (localized vs. global), enhancing the understanding of the synoptic evolution of extreme cold events in East Asia.

Funding

Not specified in the provided text.

Citation

@article{XUE2025Linkage,
  author = {XUE, Shu-Hang and Chagnon, Jeffrey M. and Bourassa, Mark A.},
  title = {The Linkage between the Extreme Cold Air Outbreaks and Rossby Wave Breaking over East Asia},
  journal = {Journal of Climate},
  year = {2025},
  doi = {10.1175/jcli-d-25-0078.1},
  url = {https://doi.org/10.1175/jcli-d-25-0078.1}
}