A study was carried out to investigate the effects of meteorological conditions on atmospheric Nitrogen Oxide (NO_x (Nitrogen Oxide and Nitrogen Dioxide)) concentrations at a site in Dublin. Data used in the study (meteorological conditions and hourly NO_x concentrations) were compiled from hourly records for the years 1988-1992. The research identified wind speed, air pressure and wind direction as the most important meteorological parameters for understanding the behaviour of extreme NO_x concentrations in Dublin's air. Daily, weekly and seasonal variation in NO_x concentrations were observed. This work also highlighted the importance of the role played by general synoptic weather conditions over local climatic effects in extreme events.
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