||Spatial Variation in Ozone Concentrations in Phoenix, AZ for 1997.
||Environmental Protection Agency, Washington, DC. Office of Research and Development.
Air pollution monitoring ;
Atmospheric composition ;
Environmental exposure pathway ;
Human health ;
Health effects ;
Metropolitan areas ;
Population density ;
Statistical data ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Statistical analyses of the human health effects of airborne pollutants based on aggregate population time-series data have often relied on ambient concentrations of pollutants measured at one or more central sites in a given metropolitan area. In the particular case of ground-level ozone pollution, central-site monitoring has been justified as a regional measure of exposure partly on grounds that correlations between concentrations at neighboring sites measured over time are usually high. In analyses where multiple monitoring sites provide ambient ozone concentrations, a summary measure such as an average has thus often been regarded as adequately characterizing the exposure distribution. Indeed, a number of studies have referred to multiple-site averaging as the method for measuring ozone exposure. This report revisits the practice of multiple-site averaging. The results are drawn from an analysis examining simultaneous mapping of population density and ambient ozone concentrations on the scale of a single metropolitan area. Because of the ready availability of data associated with a related research effort, the city selected for this analysis was Phoenix, AZ.
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||68A; 68G; 43F
||PC A03/MF A03