Initial Evaluation of Canadian and United States Regional Models for Transboundary Air Pollution
In accordance with the U.S.-Canada Memorandum of Intent on Transboundary Air Pollution, Work Group 2 and its Modeling Subgroup are charged with describing the transport and transformation of air pollutants from their source regions to final deposition, especially wet sulfur deposition in sensitive ecological regions. The Modeling Subgroup has organized a comprehensive inter-comparison and evaluation of eight regional air quality simulation models for eastern North America. The initial inter-comparison and evaluation was based on transfer matrix elements for 11 source regions and 9 targeted sensitive areas. So far, no model has emerged as clearly superior or inferior to the others from the first of three rounds of model evaluation. The first round of evaluation has primarily served to reveal (1) the deficiences in the monitoring data bases, (2) the need for some changes in input parameters for some of the models, and (3) the need to use at least one more year of independent data for model evaluation. The future plans for completing the comprehensive inter-comparison and evaluation are described.
KeywordsSource Region Transfer Matrix Sensitive Area National Atmospheric Deposition Program Quality Final Report
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