Determining Factors of OH Reactivity in the New York Metropolitan Areas and Their Implications in Ozone Production.

AEROMMA, a comprehensive field observational campaign in New York, New York, provides a unique opportunity to examine the impacts of various emission sources, including biogenic and anthropogenic sources, on regional photochemistry. We intend to present ground OH reactivity observational results at the Manhattan site. We assess the relative contributions to OH reactivity from various emission sources in the city, such as vegetation, conventional anthropogenic sources, and volatile consumer products. The impacts of their oxidation products on regional photochemistry will be discussed. Various meteorological conditions during the observational period allow us to probe emission and photochemical processes and their impacts on OH reactivity in different climate conditions. Finally, the evaluations of ozone production efficiency using the OH reactivity scale will also be presented.