27th Conference on Hurricanes and Tropical Meteorology


Modeled secondary eyewall and spiral band dynamics

Wesley D. Terwey, Colorado State University, Fort Collins, CO; and M. T. Montgomery

A long-time (order one week) high-resolution numerical integration of a full-physics cloud model of a tropical cyclone vortex is used to investigate the dynamical and thermodynamical processes behind the formation of the principal coherent structures frequently observed in mature tropical cyclones. With a focus on gravity and vortex Rossby wave/mean flow interactions, as well as thermodynamic control principles, we pursue an explanation for the formation of spiral bands and secondary eyewalls and a clearer understanding of how these features influence the structure and intensity of the simulated vortex.

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Session 2B, Tropical Cyclone Structure II
Monday, 24 April 2006, 10:30 AM-12:00 PM, Regency Grand BR 1-3

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