Atmos. Chem. Phys. Discuss., 11, 25205-25261, 2011
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Aerosol simulation applying high resolution anthropogenic emissions with the EMAC chemistry-climate model
A. Pozzer1,2, A. de Meij1, K. J. Pringle3, H. Tost4, U. M. Doering5, J. van Aardenne6, and J. Lelieveld1,2,7
1The Cyprus Institute, Energy, Environment and Water Research Center, P.O. Box 27456, 1645 Nicosia, Cyprus
2Air Chemistry Department, Max-Planck Institute of Chemistry, P.O. Box 3060, 55020 Mainz, Germany
3School of Earth and Environment, Univ. of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
4Institut für Physik der Atmosphere, Johannes-Gutenberg Universität Mainz, 55099, Mainz, Germany
5Federal Environment Agency (UBA), Wörlitzer Platz 1, 06844, Dessau, Germany
6Air and climate change-mitigation, European Environment Agency, Kongens Nytorv 6, 1050 Copenhagen K, Denmark
7King Saud University, Riyadh 11451, Saudi Arabia

Abstract. The new high resolution global anthropogenic emission inventory (EDGAR-CIRCE) of gas and aerosol pollutants has been incorporated in the chemistry general circulation model EMAC (ECHAM5/MESSy Atmospheric Chemistry). A high horizontal resolution simulation is performed for the years 2005–2008 to evaluate the capability of the model and the emissions to reproduce observed aerosol concentrations and aerosol optical depth (AOD) values. Model output is compared with observations from different measurement networks (CASTNET, EMEP and EANET) and AODs from remote sensing instruments (MODIS and MISR). The model reproduces the main spatial and temporal atmospheric features of the sulfate, ammonium and nitrate aerosol distributions. A good spatial agreement of the distribution of sulfate and ammonium aerosol is found when compared to observations, while calculated nitrate aerosol concentrations show some discrepancies. The simulated temporal development of the inorganic aerosols is in line with measurements of sulfate and nitrate aerosol, while for ammonium aerosol some deviations from observations occur over the USA. The calculated AODs agree well with the satellite observations in most regions, while a negative bias is found for the equatorial area and in the dust outflow regions (i.e. Central Atlantic and Northern Indian Ocean), due to an underestimation of biomass burning and aeolian dust emissions, respectively.

Citation: Pozzer, A., de Meij, A., Pringle, K. J., Tost, H., Doering, U. M., van Aardenne, J., and Lelieveld, J.: Aerosol simulation applying high resolution anthropogenic emissions with the EMAC chemistry-climate model, Atmos. Chem. Phys. Discuss., 11, 25205-25261, doi:10.5194/acpd-11-25205-2011, 2011.
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