Nitrogen oxides,regional transport,and ozone air quality: Results of a regional-scale model for the midwestern United States |
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Authors: | Sanford Sillman Perry J Samson |
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Institution: | 1. Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, 48109-2143, Ann Arbor, MI, USA
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Abstract: | An overview of the role of NO x in the formation of rural O3, regional transport and its potential impact on urban air quality is presented. An analysis of a specific O3 excursion in southeast Michigan (8-2-90) is performed based on a combined urban and regional-scale model. The regional component of the model represents transport and photochemistry from sources as far away as Texas. Results suggest that rural O3 and regional transport sensitive to NO x emissions and relatively insensitive to changes in volatile organic carbon (VOC) emissions. This differs from the situation in urban areas, where O3 is sensitive to both NO x and VOC. Regional transport and upwind NO x emissions have a significant impact on peak O3 in Detroit. Implications for urban and regional-scale abatement strategies are discussed. |
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