Storm Track Dynamics in Extratropical Climate Systems

The midlatitude storm tracks are corridors of recurrent cyclones that transport heat, moisture and momentum from the subtropics to the Arctic. They arise from baroclinic instability in regions of strong meridional temperature gradient, in turn governed by the thermal contrast between warm equatorial air and cold polar air. These storm tracks shape the path and intensity of westerly jet streams, drive interannual and seasonal climate variability, and modulate extreme weather events such as heavy precipitation and wind storms. The dynamics of storm tracks are controlled by a complex interplay between transient eddies and the mean flow, encompassing both baroclinic growth via eddy heat flux and barotropic processes that feed energy back into the jet. Teleconnections such as El Niño–Southern Oscillation and the Pacific Decadal Oscillation further modulate storm track position and strength, with consequences for regional climate patterns and wind energy resources. Recent advances in observational reanalyses, numerical modelling and novel diagnostics have deepened our understanding of how ocean–atmosphere interactions, eddy feedbacks and external forcings co-determine storm track variability on timescales from days to decades.

Research from Nature Portfolio

New analyses have employed high-resolution models to quantify how cyclonic and anticyclonic vortices contribute separately to storm track energetics and jet maintenance. The findings reveal that cyclones dominate the reinforcement of near-surface westerlies through baroclinic conversion, while anticyclones carry momentum from the upper tropospheric jet core downstream, sustaining the westerly winds. In parallel, improvements in seasonal prediction systems demonstrate that year-to-year variations of tropical Pacific sea surface temperatures imprint on extratropical storm track patterns, enabling skilful forecasts of wind energy potential over key midlatitude regions months in advance. These studies collectively highlight the dual role of transient eddy types and large-scale teleconnections in driving both short-term weather variability and seasonal climate predictability.

Storm Track Dynamics in Extratropical Climate Systems publication trend

The graph below shows the total number of articles in storm track dynamics in extratropical climate systems across all publications each year (not limited to Nature Index journals).

Technical terms

Storm track: A preferred pathway of extratropical cyclones that transports heat, moisture and momentum across midlatitudes.

Baroclinicity: The measure of vertical and horizontal temperature gradients that drives baroclinic instability and eddy growth.

Transient eddies: Short-lived atmospheric disturbances that extract energy from the mean flow and contribute to weather variability.

Jet stream: A narrow band of strong winds in the upper troposphere, whose position and strength are linked to storm track dynamics.

References

1. Cyclonic and anticyclonic contributions to atmospheric energetics. Scientific Reports (2021).
2. Skillful seasonal prediction of wind energy resources in the contiguous United States. Communications Earth & Environment (2024).
3. Impacts of Strong El Niño–Southern Oscillation Events on Wintertime Northern Hemisphere Storm Tracks in Two Pacific Decadal Oscillation Phases during 1950–2010. Sustainability (2023).
4. The storm-track suppression over the western North Pacific from a cyclone life-cycle perspective. Weather and Climate Dynamics (2021).