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 2NRC Research Associateship Programs, Washington, D.C., USA
Abstract. The formation of new aerosol from the gas phase is commonly represented in
atmospheric modeling with parameterizations of the steady state nucleation rate.
Present parameterizations are based on classical nucleation theory or on
nucleation rates 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
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., 7, 3447-3459, doi:10.5194/acp-7-3447-2007, 2007.