HR: 14:55h
AN: A53D-06    [Abstracts]
TI: An Examination of Summertime Cyclone Transport Processes Compared to Classical Warm Conveyor Belts Defined During the Cool Season
AU: * Fuelberg, H E
EM: fuelberg@met.fsu.edu
AF: Department of Meteorology, Florida State University, 404 Love Building, Tallahassee, FL 32306 United States
AU: Kiley, C M
EM: ckiley@met.fsu.edu
AF: Department of Meteorology, Florida State University, 404 Love Building, Tallahassee, FL 32306 United States
AB: Warm conveyor belts (WCBs) generally have been described in the literature as mechanisms for transporting pollution during the cool season. Transport during the other half of the year, the warm season, has received much less attention. WCBs are assumed to be weaker during the warm season; however, they presumably still are major transport mechanisms. Thus, it is important to understand and document their characteristics. Fine resolution model-derived meteorological data, air parcel trajectories, and flux calculations are used to examine presumed WCBs during the INTEX-A period (June - August 2004). Lifting and transport mechanisms documented during the INTEX-A period are compared to the classical definition of WCBs found in the literature. Satellite imagery and trajectories on several days during INTEX-A initially appear to meet the criteria to be classified as a WCB. However, a more comprehensive investigation does not identify a single INTEX-A case meeting the classical WCB definition. The main difference between a WCB and what was encountered during INTEX is the mechanism for and location of greatest ascent. The strength of warm season lofting is found to be of the same order of magnitude as during the cool season, but convection is shown to be the dominant lofting mechanism during the warm season. In convective regions, ascent tends to be more rapid and is often displaced from the center of the cyclone. Regions lacking convective influence appear unable to produce WCB like features. The lofting mechanism and location of maximum ascent are shown to vary based on season.
DE: 3314 Convective processes
DE: 3329 Mesoscale meteorology
DE: 3354 Precipitation (1854)
DE: 3355 Regional modeling
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005