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Linking Global to Regional Models to Assess Future Climate Impacts on Surface Ozone Concentrations in the United States
Citation:
NOLTE, C. G., A. GILLILAND, C. Hogrefe, AND L. J. MICKLEY. Linking Global to Regional Models to Assess Future Climate Impacts on Surface Ozone Concentrations in the United States. JOURNAL OF GEOPHYSICAL RESEARCH. American Geophysical Union, Washington, DC, 113(D14307):1-14, (2008).
Impact/Purpose:
The objective of this work is to investigate the impact of global climate change on the regional air quality of the United States. Impacts of climate change on meteorological patterns and primary source emissions are investigated as primary elements influencing future air quality.
Description:
The UCD sectional aerosol model has been coupled to the CMAQ air quality model and used to simulate air quality in Tampa, Florida. Sea salt emissions are parameterized as a function of modeled wind speed and relative humidity. Modeled aerosol sulfate, nitrate, ammonium, sodium, and chloride concentrations are compared with measurements conducted during May 2002. Aerosol size distributions are simulated very accurately, though nitrate concentrations are underpredicted by a factor of two. The model’s depletion of chloride in coarse particles due to displacement by nitric acid is also evaluated.