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Do tropical cyclones intensify by WISHE? by Michael T. Montgomery; Nguyen Van Sang; Roger K. Smith; John Persing is a Earth and Planetary Sciences article available to read on EtoBox.

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## Abstract In this paper we seek and obtain a basic understanding of tropical cyclone intensification in three dimensions when precipitation and evaporative‐cooling (warm rain) processes are included. Intensification with warm rain physics included is found to be dominated by highly localized deep convective structures possessing strong cyclonic vorticity in their cores—dubbed ‘Vortical Hot Towers’ (VHTs). Unlike previous studies, the findings herein suggest an intensification pathway that is distinct from the ‘evaporation–wind’ feedback mechanism known as wind‐induced surface heat exchange (WISHE), which requires a positive feedback between the azimuthal‐mean boundary‐layer equivalent potential temperature and the azimuthal‐mean surface wind speed underneath the eyewall of the storm. Intensification from a finite‐amplitude initial vortex is shown to not require this evaporation–wind feedback process. Indeed, when the surface wind speed in the sea‐to‐air vapour fluxes is capped at a nominal (trade‐wind) value, the vortex still intensifies by the same pathway identified in the main experiments via the generation of locally buoyant VHTs and the near‐surface convergence that the VHTs

Who reads Do tropical cyclones intensify by WISHE??

Author

Michael T. Montgomery; Nguyen Van Sang; Roger K. Smith; John Persing

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley (ISSN 0035-9009)

Published

2009

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)