Tropospheric chemistry: Global change and urban neglect



During the past decade, major advances have been made in the field of tropospheric chemistry, especially with regard to ozone and associated species (reactive nitrogen, peroxides, and OH). These advances have been driven largely by a series of field measurement campaigns in locations ranging from Brazil and Hawaii to Greenland and Nova Scotia. There is a major gap in the coverage of the tropospheric research program, however. Ozone chemistry is not measured in urban and downwind locations in the United States that are subject to violations of air quality standards.