Empirical ozone production evaluations in different NOX conditions using OH reactivity.

Total OH reactivity observations have been instrumental in quantifying unidentified and unmeasured reactive trace gases in the atmosphere. We present an evaluation of ozone production efficiency using OH reactivity observations and the dataset from recent field campaigns in various urban areas such as the Seoul Metropolitan Area and New York City. These two metropolitan areas exhibited different VOC mixtures and NOX levels. The discussion will focus on how OH reactivity-based ozone production regime evaluations differ from the conventional categorizations of ozone production regimes using mixing ratios of trace gases such as VOCs and NOx. The discussion will evolve to evaluate the future impacts of emission controls and climate change on ozone production chemistry.