Liu et al. (2026) Mapping Synchronous Heatwaves in the Northern Hemisphere: Insights from Climate Network Analysis

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

Identification

• Journal: Journal of Climate
• Year: 2026
• Date: 2026-03-03
• Authors: Yimin Liu, Wen Bao, Weiwei Hu, GX Wu, YiMin LIU
• DOI: 10.1175/jcli-d-25-0328.1

Research Groups

Not specified in the abstract.

Short Summary

This study identifies hotspot regions and dominant synchronization patterns of summertime synchronous extreme heatwaves across the Northern Hemisphere using a climate network method. It reveals connections to large-scale atmospheric circulation patterns, including Rossby waves and zonal wave trains, and highlights the role of positive soil moisture feedback in intensifying these events.

Objective

• To objectively identify hotspot regions of synchronous extreme heatwaves and their dominant synchronization patterns across the Northern Hemisphere.
• To explore the associated large-scale atmospheric circulation patterns and soil moisture feedback processes linked to these heatwaves.

Study Configuration

• Spatial Scale: Northern Hemisphere
• Temporal Scale: Summertime (specific period not provided)

Methodology and Data

• Models used: Event synchronization climate network method
• Data sources: Not specified in the abstract.

Main Results

• Regions susceptible to synchronous heatwaves include most of Europe, the western Arabian Peninsula, East Asia, Southeast Asia, western and southern North America, and Greenland.
• Strong synchronization patterns were identified: Southeast Asia and western North America synchronize with the Caspian Sea, while East Asia and southern North America primarily synchronize with northern-central Europe.
• Southeast Asia–Caspian Sea and East Asia–northern-central Europe synchronization patterns are linked to northwest-southeastward propagating Rossby waves.
• Western North America–Caspian Sea and southern North America–central Europe synchronization patterns correspond to zonal wave trains.
• These circulation patterns feature concurrent anticyclonic anomalies over synchronized heatwave regions, promoting warming through adiabatic subsidence and increased solar radiation.
• Concurrent local soil moisture drying increases the likelihood of co-occurrences through positive land-atmosphere feedback, intensifying and prolonging heatwaves.

Contributions

• Systematically maps synchronous heatwave hotspots and synchronization patterns across the Northern Hemisphere.
• Highlights novel cross-latitudinal connections in synchronous heatwave occurrences.
• Establishes a foundational understanding for future research to disentangle dynamic and thermodynamic influences on synchronous heatwaves.

Funding

Not specified in the abstract.

Citation

@article{Liu2026Mapping,
  author = {Liu, Yimin and Bao, Wen and Hu, Weiwei and Wu, GX and LIU, YiMin},
  title = {Mapping Synchronous Heatwaves in the Northern Hemisphere: Insights from Climate Network Analysis},
  journal = {Journal of Climate},
  year = {2026},
  doi = {10.1175/jcli-d-25-0328.1},
  url = {https://doi.org/10.1175/jcli-d-25-0328.1}
}