Abstract
Photochemical smog often enshrouds metropolitan areas throughout the Northeastern United States during the summer. Ozone levels exceeding the level of the National Ambient Air Quality Standard (NAAQS), 120 ppb, occur during such smog episodes. Ambient monitoring data indicate that high ozone levels persist despite efforts to reduce ozone precursor emissions from automobiles and industrial sources. Also, field studies have shown that ozone pollution often spreads over several States to impact areas across hundreds of miles. The Environmental Protection Agency has responded to the need to understand this complex problem of long-range ozone transport in part by sponsoring the development of the Regional Oxidant Model (ROM). The purpose of this video is to display ozone concentrations predicted by ROM in a manner which graphically depicts the formation and transport of ozone within the Northeast. As shown in the video, patterns of interurban and interstate transport of moderate to high ozone levels are clearly evident across this region.
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