Anthropogenic Sources of CO and PAH and the Role that Meteorology Played in the Apportionment of the Sources of These Pollutants. A. H. Huber and M. P. Zelenka, Atmospheric Sciences Modeling Division, Air Resources Laboratory (MD-56), National Oceanic and Atmospheric Administration, Research Triangle Park, NC 27711; W. C. Nelson, EPA National Exposure Research Laboratory, Research Triangle Park, NC 27711; W. Ott, Department of Statistics, Stanford University, Stanford, CA 94305; N. Klepeis, Lockheed Environmental Systems and Technology, 980 Kelly Johnson Dr., Las Vegas, NV 89119; and P. Switzer, Department of Statistics, Stanford University, Stanford, CA 94305
This paper investigates the sources of CO and PAHs that were impacting a single monitoring site. The objective was to characterize the source contribution to the monitoring site with particular emphasis on the meteorology influencing the time series of the pollutant. In the case of CO and PAHs, an important question that was answered was; what fraction of the outdoor contribution of these pollutants was due to motor vehicles and what part was due to wood smoke? Detailed diary accounts of anthropogenic activity resulting in releases of air pollutants into the environment were used in the analysis. Detailed meteorological information on a local scale were used as well. Sampling was done at the Residential Exposure Project (REP) house in Redwood City, California. Continuous samples of CO and PAHs were collected with 1-hr time resolution. The data collection at the REP house was, and is, ongoing from January, 1995. This study enhanced our understanding of how local meteorological conditions affects the time series of CO and PAH concentrations on a relatively small spatial scale (i.e., less than 1 km).