Ninth Conference on Atmospheric Chemistry
19th Conference on Climate Variability and Change
AMS Forum: Climate Change Manifested by Changes in Weather


Global climate change impacts on air quality in North America

Efthimios Tagaris, Georgia Institute of Technology, Atlanta, GA; and K. J. Liao, K. Manomaiphiboon, A. G. Russell, S. He, J. H. Woo, P. Amar, and L. R. Leung

Global climate change over the next century is predicted to have a direct impact in future meteorology (e.g. temperature, downward solar radiation, precipitation frequency) over the North America which, in turn, impacts air quality. The objective of this study is to assess the impacts of global climate change on regional air quality over North America (continental U.S, South Canada and North Mexico). We focus on O3 and PM2.5 (PM with an aerodynamic diameter less than 2.5 m) as they have suspected health effects. Nine (9) month summer episodes (JJA) in both historical (i.e. 2000 2002) and future years (i.e. 2049 - 2051) are simulated using US EPA's Models3 modeling system, MM5/SMOKE/CMAQ. Meteorological inputs to the CMAQ chemical transport model are developed by downscaling GISS Global Climate Model outputs using MM5. Both the direct (impact of climate change on meteorology) and indirect impacts (those caused by emission changes due to either/both controls and climate change) are evaluated using two different cases. In the first case, the impacts of changes on air quality by climate alone are examined by keeping emissions sources, activity levels and controls constant. In the second case, the future pollutant concentrations are estimated based on changes in climate and emissions using IPPC A1B emission scenarios and planned controls.

extended abstract  Extended Abstract (112K)

Supplementary URL: http://presentation

Joint Session 8, Air Quality and Climate Change (Joint with Ninth Conference on Atmospheric Chemistry, Forum on Climate Change as Manifested by Changes in Weather, and 19th Conference on Climate Variability and Change)
Tuesday, 16 January 2007, 1:30 PM-2:30 PM, 212A

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