28th Conference on Hurricanes and Tropical Meteorology

6C.3

Boundary layer roll dynamic and thermodynamic structures as determined by dropwindsondes

Sim Aberson, Hurricane Research Division, AOML, Miami, FL; and D. P. Stern

Since 1997, 59 dropwindsonde profiles within tropical cyclone eyewalls

have reported extreme horizontal wind speeds (arbitrarily defined as wind

speed > 90ms-1). From these profiles, a schematic of the structure of

the features in which the extreme horizontal wind speed is located is

proposed. The features are located generally on the inner edge of the

eyewall, and curve upward, outward, and upwind with height. They are

in localized regions of relatively high vertical vorticity, and are

usually associated with updrafts and relatively high equivalent

potential temperature, suggesting convective meso- or miso-cyclones.

wrf recording  Recorded presentation

Session 6C, Field Programs: RAINEX, TCSP and IFEX
Tuesday, 29 April 2008, 10:15 AM-12:00 PM, Palms H

Previous paper  Next paper

Browse or search entire meeting

AMS Home Page