Overview of the 1997 Southern California Ozone Study (SCOS97-NARSTO)

During the summer of 1997, the Southern California Ozone Study-NARSTO 1 1 NARSTO, originally the North American Research Strategy for Tropospheric Ozone, is a public/private partnership whose membership spans government, utilities, industry, and academia throughout Canada, Mexico, and the United States. Its primary mission is to coordinate and enhance policy-relevant scientific research and assessment of tropospheric ozone and airborne particle behavior and provides a cross-organization planning process for scientific investigations. (SCOS97-NARSTO) was conducted in order to update and improve the existing emission, meteorological, and air quality databases and model applications for representing urban-scale ozone episodes in Southern California, and to quantify the contributions of ozone generated from emissions in Southern California air basins to US and California ambient ozone standard exceedances in neighboring air basins. The SCOS97-NARSTO also examined the generation and evolution of typical late-summer and early fall aerosols in the Los Angeles area. This paper describes the study area and design of the field campaign, summarizes the field measurements, and reviews data analysis and modeling efforts.