Atmos. Chem. Phys. Discuss., 7, 2169-2196, 2007
www.atmos-chem-phys-discuss.net/7/2169/2007/
doi:10.5194/acpd-7-2169-2007
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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.
A semi-analytical method for calculating rates of new sulfate aerosol formation from the gas phase
J. Kazil1,2 and E. R. Lovejoy1
1NOAA Earth System Research Laboratory, Boulder, CO, USA
2National Research Council Associateship Program, Washington, D.C., USA

Abstract. The formation of new sulfate aerosol from the gas phase is commonly represented in atmospheric modeling with parameterizations of the steady state nucleation rate. Such parameterizations are based on classical nucleation theory or on aerosol nucleation rate tables, calculated with a numerical aerosol model. These parameterizations reproduce aerosol nucleation rates calculated with a numerical aerosol model only imprecisely. Additional errors can arise when the nucleation rate is used as a surrogate for the production rate of particles of a given size. We discuss these errors and present a method which allows a more precise calculation of steady state sulfate aerosol formation rates. The method is based on the semi-analytical solution of an aerosol system in steady state and on parameterized rate coefficients for H2SO4 uptake and loss by sulfate aerosol particles, calculated from laboratory and theoretical thermodynamic data.

Citation: Kazil, J. and Lovejoy, E. R.: A semi-analytical method for calculating rates of new sulfate aerosol formation from the gas phase, Atmos. Chem. Phys. Discuss., 7, 2169-2196, doi:10.5194/acpd-7-2169-2007, 2007.
 
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