Peters et al. (2026) A Unified Theory for the Global Thunderstorm Distribution and Land–Sea Contrast

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

Identification

• Journal: Geophysical Research Letters
• Year: 2026
• Date: 2026-01-01
• Authors: John M. Peters, Daniel R. Chavas, Chun‐Yian Su, Elisa M. Murillo, Gretchen L. Mullendore
• DOI: 10.1029/2025gl120252

Research Groups

Not specified in the abstract.

Short Summary

This study evaluates Entraining CAPE (ECAPE) as an improved proxy for intense thunderstorms in climate studies, demonstrating its superior skill in correlating with and discriminating intense thunderstorms globally compared to traditional metrics, and explaining the land-sea contrast in thunderstorm intensity.

Objective

• To evaluate Entraining CAPE (ECAPE) as a thunderstorm proxy in climate studies using Global Precipitation Measurement satellite observations.
• To compare ECAPE's performance against previous metrics for updraft speed and thunderstorm discrimination.
• To investigate the atmospheric conditions contributing to intense thunderstorms and the land-sea contrast in thunderstorm intensity.

Study Configuration

• Spatial Scale: Global regions.
• Temporal Scale: Climatological (implied by "climate studies").

Methodology and Data

• Models used: Entraining CAPE (ECAPE), a modified version of traditional Convective Available Potential Energy (CAPE) accounting for entrainment's dependence on vertical wind shear, lifted condensation level (LCL) height, and surrounding atmospheric properties.
• Data sources: Global Precipitation Measurement (GPM) satellite observations.

Main Results

• ECAPE shows stronger pattern correlations with global regions of intense thunderstorms than previous metrics for updraft speed.
• ECAPE more skillfully discriminates intense thunderstorms from less intense counterparts compared to other commonly used metrics in climatology and climate change studies.
• Intense thunderstorms are associated with large CAPE, large vertical wind shear, and high lifted condensation level (LCL) heights, which promote wide updrafts shielded from dry-air entrainment.
• The well-known land-sea contrast in thunderstorm intensity is attributed to larger CAPE and higher LCL heights over land than over the ocean.

Contributions

• Introduces and validates ECAPE as a more robust and skillful proxy for intense thunderstorms in climate studies.
• Enhances the understanding of the atmospheric conditions (CAPE, vertical wind shear, LCL height) that favor the development of intense thunderstorms.
• Provides an explanation for the observed land-sea contrast in thunderstorm intensity based on atmospheric thermodynamic and kinematic parameters.
• Offers an improved metric for future climatological and climate change assessments of thunderstorms.

Funding

Not specified in the abstract.

Citation

@article{Peters2026Unified,
  author = {Peters, John M. and Chavas, Daniel R. and Su, Chun‐Yian and Murillo, Elisa M. and Mullendore, Gretchen L.},
  title = {A Unified Theory for the Global Thunderstorm Distribution and Land–Sea Contrast},
  journal = {Geophysical Research Letters},
  year = {2026},
  doi = {10.1029/2025gl120252},
  url = {https://doi.org/10.1029/2025gl120252}
}