Articles | Volume 6, issue 2
https://doi.org/10.5194/wcd-6-387-2025
https://doi.org/10.5194/wcd-6-387-2025
Research article
 | 
11 Apr 2025
Research article |  | 11 Apr 2025

An ERA5 climatology of synoptic-scale negative potential vorticity–jet interactions over the western North Atlantic

Alexander Lojko, Andrew C. Winters, Annika Oertel, Christiane Jablonowski, and Ashley E. Payne

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Cited articles

Archambault, H. M., Bosart, L. F., Keyser, D., and Cordeira, J. M.: A climatological analysis of the extratropical flow response to recurving western North Pacific tropical cyclones, Mon. Weather Rev., 141, 2325–2346, 2013. a
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Baumgart, M. and Riemer, M.: Processes governing the amplification of ensemble spread in a medium-range forecast with large forecast uncertainty, Q. J. Roy. Meteor. Soc., 145, 3252–3270, 2019. a, b, c
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Short summary
Convective storms can produce intense anticyclonically rotating vortices (~10 km) defined by negative potential vorticity (NPV), which can elongate to larger scales (~1000 km). Our composite analysis shows that elongated NPV frequently occurs along the western North Atlantic tropopause, where we observed it enhancing jet stream kinematics. Elongated NPV may impinge on aviation turbulence and weather forecasting despite its small-scale origin.
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