An analysis of the meteorological and air quality conditions during an extreme ozone episode over the north-eastern USA

Abstract
In this study, an extreme ozone episode that occurred during the period 12-15 July 1995 over the north-eastern United States is investigated through model simulations. This paper is focused on the meteorological conditions prevailing during this ozone episode. The analysis is based on nested grid simulations performed with the meteorological model CSU-RAMS (Colorado State University - Regional Atmospheric Modelling System) and on the available surface and upper air observations. The definition of the model nests seemed very important in order to capture the prevailing atmospheric circulations which led to the build up of the air pollution episode.

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