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The poleward migration of the location of tropical cyclone maximum intensity

Open access
Kossin, James P., Emanuel, Kerry A., Vecchi, Gabriel A.·2014·Nature

Abstract

Temporally inconsistent and potentially unreliable global historical data hinder the detection of trends in tropical cyclone activity. This limits our confidence in evaluating proposed linkages between observed trends in tropical cyclones and in the environment. Here we mitigate this difficulty by focusing on a metric that is comparatively insensitive to past data uncertainty, and identify a pronounced poleward migration in the average latitude at which tropical cyclones have achieved their lifetime-maximum intensity over the past 30 years. The poleward trends are evident in the global historical data in both the Northern and the Southern hemispheres, with rates of 53 and 62 kilometres per decade, respectively, and are statistically significant. When considered together, the trends in each hemisphere depict a global-average migration of tropical cyclone activity away from the tropics at a rate of about one degree of latitude per decade, which lies within the range of estimates of the observed expansion of the tropics over the same period. The global migration remains evident and statistically significant under a formal data homogenization procedure, and is unlikely to be a data artefact. The migration away from the tropics is apparently linked to marked changes in the mean meridional structure of environmental vertical wind shear and potential intensity, and can plausibly be linked to tropical expansion, which is thought to have anthropogenic contributions.

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Metadata

Authors
Kossin, J. P., Emanuel, K. A., & Vecchi, G. A.
Venue
Nature
Published
2014-05
Volume
509
Issue
7500
Pages
349-352
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2047541208
Cited by
786
References
27
FWCI
29.13
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The poleward migration of the location of tropical cyclone maximum intensity. https://app.cochat.ai/papers/10.1038/nature13278
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Kossin, J. P., Emanuel, K. A., & Vecchi, G. A. (2014). The poleward migration of the location of tropical cyclone maximum intensity. Nature. https://doi.org/10.1038/nature13278

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