Extended Abstract (620K)3.20
Boundary-layer Structure Upwind and Downwind of Oklahoma City during the Joint Urban 2003 Field Study
Stephan F. J. De Wekker, PNNL, Richland, WA; and L. K. Berg, K. J. Allwine, J. C. Doran, and W. J. Shaw
The Joint Urban 2003 field study in Oklahoma City in July 2003 provided a comprehensive data set that included measurements from sites upwind and downwind of Oklahoma City where sodars, radar wind profilers/RASSes, and radiosondes were deployed. Radiosonde measurements were taken during 6 daytime intensive observational periods (IOPs) and during 4 nighttime IOPs, while the sodars and radars operated almost continuously during the entire month of July. The upwind and downwind sites were located approximately 2 km south and 5 km north of downtown Oklahoma City, respectively. Boundary-layer heights and wind and temperature structure at both sites have been investigated and compared to determine effects of the urban area on mean boundary-layer structure. Initial results show that differences in boundary-layer structure between the upwind and downwind location are small but significant. We plan to compare these measurements with a numerical model and simple analytical models such as those that predict the growth of an internal boundary layer after a roughness change, and an advective thermodynamic model used to determine mixing heights in an urban area.
Session 3, results and opportunities associated with large collaborative intensive urban campaigns (e.g. Oklahoma Joint Urban Atmospheric Dispersion Study 2003) (parallel with sessions 2 and 4)
Monday, 23 August 2004, 10:30 AM-5:30 PM
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