The 1996 Paso del Norte Ozone Study and subsequent data analyses were implemented to develop an understanding of the chemical and physical processes which lead to high concentrations of ozone in the Paso del Norte study area which includes El Paso County, Texas, Sunland Park, New Mexico, and Ciudad Juárez, Mexico. Both the data and data analysis results are being used to support photochemical g...

An overview of VOC reactivity with respect to ground level ozone formation, and the mechanistic and environmental factors affecting it, are discussed. Methods of quantifying reactivity are described, and the roles of chemical mechanisms and environmental chamber data in reactivity quantification are discussed. A brief summary of ongoing reactivity-related research is presented, which can be cla...

Key findings !" Atmospheric concentrations of ozone depleting substances have decreased as a result of the effectiveness of the Montreal Protocol. !" The global (60°S–60°N) ozone concentration is projected to return to pre-1980 levels by around the middle of the 21st century. !" Antarctic ozone levels are projected to return to pre-1980 levels around 2060–75, which is 10–25 years later than pre...

Selected results of environmental chamber experiments carried out in the new large indoor environmental chamber at the University of California at Riverside (UCR) that are relevant to quantifying ozone impacts of volatile organic compounds (VOCs) are described. Issues and data needs for quantification of VOC reactivities towards ground-level ozone are described. The ability of the current SAPRC...

In this paper, we present a decision-making framework (DMF) for reducing ozone pollution in metropolitan Atlanta. High concentrations of ozone at the ground-level continues to be a serious problem in several U.S. cities, and Atlanta is one of the most serious. In contrast to the “trial and error” approach utilized by state government decision makers, our DMF searches for dynamic and focused con...

Analyses of satellite, ground-based, and balloon measurements allow updated estimates of trends in the vertical profile of ozone since 1979. The results show overall consistency among several independent measurement systems, particularly for northern hemisphere midlatitudes where most balloon and ground-based measurements are made. Combined trend estimates over these latitudes for the period 19...