A Fast Analytical Model for the Complete Radial Structure of Tropical Cyclone Low‐Level Wind Field

Abstract A tropical cyclone (TC) can generally be divided into three regions: inner core with vigorous convection, intermediate region with intermittent convection, and far outer region with less convective activity. The different physics in these three regions suggest correspondingly different wind structure models. In this study, we combine the inner‐core wind model from Tao et al. (2023, https://doi.org/10.1029/2023gl104583 , T23), the outer wind model from Emanuel (2004, https://texmex.mit.edu/pub/emanuel/PAPERS/Energetics_Structure.pdf , E04), and a transition model of a modified Rankine vortex to create a new fast and analytical model for the complete radial structure of the TC wind field. The T23 model captures inner‐core wind variation with small errors, while the E04 model reproduces the broad outer wind structure at large radii well. The new wind model combines the strengths from both T23 and E04 models without the need for statistical fitting, showing great potential in reproducing the full range of simulated and observed TC winds.

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Publication Details

Journal
Geophysical Research Letters
Published
2026-01-03
DOI
https://doi.org/10.1029/2025gl118320
Primary Topic
Tropical and Extratropical Cyclones Research
Type
article
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article

A Fast Analytical Model for the Complete Radial Structure of Tropical Cyclone Low‐Level Wind Field

Daniel R. Chavas, D. Tao, Robert G. Nystrom, Arthur Avenas
Geophysical Research Letters
Tropical and Extratropical Cyclones Research
article

A Fast Analytical Model for the Complete Radial Structure of Tropical Cyclone Low‐Level Wind Field

Daniel R. Chavas, D. Tao, Robert G. Nystrom, Arthur Avenas
article en

Abstract

Abstract A tropical cyclone (TC) can generally be divided into three regions: inner core with vigorous convection, intermediate region with intermittent convection, and far outer region with less convective activity. The different physics in these three regions suggest correspondingly different wind structure models. In this study, we combine the inner‐core wind model from Tao et al. (2023, https://doi.org/10.1029/2023gl104583 , T23), the outer wind model from Emanuel (2004, https://texmex.mit.edu/pub/emanuel/PAPERS/Energetics_Structure.pdf , E04), and a transition model of a modified Rankine vortex to create a new fast and analytical model for the complete radial structure of the TC wind field. The T23 model captures inner‐core wind variation with small errors, while the E04 model reproduces the broad outer wind structure at large radii well. The new wind model combines the strengths from both T23 and E04 models without the need for statistical fitting, showing great potential in reproducing the full range of simulated and observed TC winds.

Geophysical Research LettersVol. 53(1)
University of Iowa (US), Centre National de la Recherche Scientifique (FR), Planetary Science Institute (US), Ifremer (FR), Université de Bretagne Occidentale (FR), Laboratory for Ocean Physics and Satellite Remote Sensing (FR), Institut Universitaire Européen de la Mer (FR), European Space Research Institute (IT), Institut de Recherche pour le Développement (FR), Nanjing University (CN)
Openalex Percentile: Top 99%
Tropical and Extratropical Cyclones Research
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A Fast Analytical Model for the Complete Radial Structure of Tropical Cyclone Low‐Level Wind Field — Daniel R. Chavas, D. Tao, et al. · Geophysical Research Letters (2026) | TGRS Research Map | TGRS