Eye Formation and Energetics in a Dry Model of Hurricane-Like Vortices
Name
atsc-JAS-D-23-0191.1.pdf
Description
Published version
Size
1.54 MB
Format
Adobe PDF
Checksum (MD5)
6de6f4f37634c04a78e240750291caa5
Author(s)
Dormy, Emmanuel
Oruba, Ludivine
Emanuel, Kerry
Date Issued
August 23, 2024
Journal
Journal of the Atmospheric Sciences
Publisher
American Meteorological Society
Citation
Dormy, E., L. Oruba, and K. Emanuel, 2024: Eye Formation and Energetics in a Dry Model of Hurricane-Like Vortices. J. Atmos. Sci., 81, 1565–1578.
Version
Final published version
Abstract
We investigate the mechanism for eye formation in hurricane-like vortices, using a formulation adapted from Oruba, Davidson, and Dormy. Numerical simulations are performed using an axisymmetric model of dry rotating Rayleigh–Bénard convection under the Boussinesq approximation. The fluxes of heat and momentum at the sea surface are described using the bulk aerodynamic formula. A simplified model for radiative cooling is also implemented. We find that the mechanism for eye formation introduced in Oruba et al., relying on vorticity stripping from the boundary layer, is robust in dry hurricane-like vortices. Furthermore, with these boundary conditions, the structure of the flow is closer to the flow of actual tropical cyclones. The applicability of this mechanism to the moist case however remains uncertain and deserves further study. Finally, energy budgets, obtained either by a heat engine approach or by a direct estimation of the work of buoyancy forces, are investigated. They provide estimations of the surface wind speed as a function of the controlling parameters.
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DOI of Published Version
https://doi.org/10.1175/JAS-D-23-0191.1
