Extended Abstract (784K)4D.4
Separation of hurricane and environmental winds via single-Doppler radar volumetric data analysis: Results from Hurricanes Bret (1999)
Paul R. Harasti, UCAR Visiting Scientist Program, NRL, Monterey, CA
A single-Doppler radar analysis method, called the volume velocity processing (VVP) method, has been extended from its original linear-wind formulation to estimate the non-linear wind field associated with a hurricane. The so-called hurricane VVP (HVVP) method provides radar-centered vertical profiles of the Cartesian wind components. These components are partitioned into the contributions due to the penetrating environmental wind and those due to the winds intrinsic to the hurricane. The tangential and radial components of the intrinsic hurricane winds are resolved with respect to a cylindrical coordinate system centered on the hurricane’s circulation center.
The HVVP method has been tested on near-simultaneous volume scans of Hurricane Bret taken by the WSR-88D radars located at Brownsville (KBRO) and Corpus Christi (KCRP), Texas, near 2343 UTC 22 August 1999. The retrieved wind components compare well to a pseudo-triple-Doppler radar analysis of Bret that included Doppler velocity data from KBRO, KCRP and a NOAA P-3 aircraft. Preliminary results from another test of the HVVP on volume scans of Hurricane Isabel (2003) taken by the WSR-88D located at Morehead City (KMHX), North Carolina, will be presented at the conference and, if possible, these results will be compared to one of two separate dual-Doppler wind analyses currently being processed by NOAA/AOML/HRD and the University of Oklahoma.
Session 4D, tropical cyclone observations and structure II
Monday, 3 May 2004, 3:45 PM-5:15 PM, Napoleon III Room
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