Eighth Conference on Coastal Atmospheric and Oceanic Prediction and Processes
Timothy R. Oke Symposium
21st Conference on Climate Variability and Change
Fourth Symposium on Policy and Socio—Economic Research
Eighth Symposium on the Urban Environment
23rd Conference on Hydrology
Fourth Conference on the Meteorological Applications of Lightning Data


Urban effects on Sea Breeze Circulation over Huston, TX

Kazuyuki Ota, University of Alabama, Huntsville, AL; and U. S. Nair, W. A. Petersen, L. D. Carey, and T. E. Nobis

The purpose of this paper is the verification of Gauthier's hypothesis that the dominant factor in the “anomaly” of Cloud-to-Ground (CG) lightning density over Houston is the enhancement of the sea breeze circulation by the urban environment. The effects of the Houston urban area are herein simulated and presented by using the Regional Atmospheric Modeling System (RAMS) developed at Colorado State University. The RAMS model used in this paper includes the Town Energy Budget (TEB) model by Masson. Therefore, the turbulent flux caused by artificial materials on the surface can then be considered to be an effect of the presence of an urban environment on sea breeze circulation as estimated through a series of simulations. The source of data for the initialization of the model was the North American Mesoscale (NAM) as provided by the University Corporation of Atmospheric Research (UCAR). To provide a more realistic simulation, soil moisture derived from NAM data was assigned to each grid. A discussion of the effect of changes in Cloud Condensation Nuclei (CCN) as predicted by simulations is also included.

wrf recording  Recorded presentation

Joint Session 5, Geographic Effects on Urban Weather and Climate
Wednesday, 14 January 2009, 4:00 PM-5:30 PM, Room 126A

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