Aviv et al. (2025) The Relation between Jet Meandering and Storm Intensity in an Idealized Aquaplanet GCM

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

Identification

• Journal: Journal of Climate
• Year: 2025
• Date: 2025-11-18
• Authors: Erez Aviv, Yohai Kaspi
• DOI: 10.1175/jcli-d-24-0444.1

Research Groups

Not explicitly stated in the abstract.

Short Summary

This study uses an idealized moist global circulation model to investigate the quantitative link between eddy-driven jet meandering and storm development under climate change. It demonstrates that Arctic amplification leads to a flattening of the mid-atmospheric meridional temperature gradient, which increases jet meandering, and that these greater meanders are associated with the development of more intense storms.

Objective

• To quantify the link between jet meandering and storm development.
• To establish a conclusive mechanism for the effect of climate change on jet meandering.
• To separate physical components in the atmospheric complex system using an idealized moist global circulation model (GCM) through global warming simulations.

Study Configuration

• Spatial Scale: Global
• Temporal Scale: Climate change (long-term global warming simulations)

Methodology and Data

• Models used: Idealized moist global circulation model (GCM)
• Data sources: Model-generated data, analyzed using Lagrangian tracking of cyclones and anticyclones.

Main Results

• A decreasing equator-to-pole temperature gradient, attributed to Arctic amplification, is connected to increased jet meandering.
• A theoretical relation was derived between the 500-hPa geopotential height meridional gradient and jet meandering, showing that the flattening of the mid-atmospheric meridional temperature gradient is the primary cause for increased jet meandering.
• As the meridional temperature gradient decreases, the eddy-driven jet slows and its meridional layout widens.
• Intense storms are more likely to be associated with jet meanders during their development stage.
• Jet stream meanders with greater meridional extent are more likely to be associated with intense storms.
• Simulations with increased mean surface temperature demonstrate an increase in both jet meandering and storm intensity.

Contributions

• Provides a quantitative link between jet meandering and storm development, which was previously lacking.
• Establishes a conclusive mechanism for the effect of climate change on jet meandering, specifically linking Arctic amplification and the flattening of the mid-atmospheric meridional temperature gradient.
• Derives a theoretical relation for the increase in jet meandering based on the 500-hPa geopotential height meridional gradient.
• Utilizes an idealized moist GCM to separate physical components of the atmospheric system, offering insights into complex climate processes.

Funding

Not explicitly stated in the abstract.

Citation

@article{Aviv2025Relation,
  author = {Aviv, Erez and Kaspi, Yohai},
  title = {The Relation between Jet Meandering and Storm Intensity in an Idealized Aquaplanet GCM},
  journal = {Journal of Climate},
  year = {2025},
  doi = {10.1175/jcli-d-24-0444.1},
  url = {https://doi.org/10.1175/jcli-d-24-0444.1}
}