We present an analysis of the ozone production efficiency (OPE) in two air masses that had passed over the greater Houston metropolitan area during the Texas 2000 Air Quality Study. These results, using preliminary observations from the Williams Tower, suggest OPE values much higher than those found at many other sites. The days selected for analysis had relatively smooth increase in O3 and NOz during the time of peak photochemical activity, and were also characterized by light easterly flow with high regional levels of ozone. In doing this analysis, we have assumed that a) all sampling was within the same parcel of air over 15-minute time intervals, and b) all changes were associated with local photochemical processes, e.g., the change in NOz associated with dry deposition of HNO3 was relatively small compared to other processes.
Revised: January 10, 2003 |
Published: January 17, 2002
Citation
Berkowitz C.M., R.A. Zaveri, C.W. Spicer, P. Doskey, and J. Weinstein-Lloyd. 2002.Ozone Production Efficiency at the Williams Tower. In Fourth Conference on Atmospheric Chemistry: Urban, Regional, and Global Scale Impacts of Air Pollutants, 171-174. Boston, Massachusetts:American Meteorological Society.PNNL-SA-35411.