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The new 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 relatively 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).  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,  due to the wrong temporal distribution of ammonia gas emissions.  The calculated AODs agree well with the satellite observations in most  regions, while negative biases are 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.  Aerosols and precursors budgets for five different regions  (North America, Europe, East Asia, Central Africa and South America)  are calculated. Over East-Asia most of the emitted aerosols (precursors) are also  deposited within the region, while in North America and Europe  transport plays a larger role.  Further, it is shown that a simulation with monthly varying anthropogenic  emissions typically improves the temporal correlation  by 5–10% compared to one with constant annual emissions

Distributions and regional budgets of aerosols and their precursors simulated with the EMAC chemistry-climate model