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Department of Physics, San José State University, U.S.A.
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- PublicationOpen AccessAn empirical approach to the nucleation of sulfuric acid droplets in the atmosphere(2003)
; ; ; ;Hamill, P.; Department of Physics, San José State University, U.S.A. ;D'Auria, R.; Department of Atmospheric Sciences, University of California, Los Angeles, U.S.A. ;Turco, P. R.; Department of Atmospheric Sciences, University of California, Los Angeles, U.S.A.; ; We use quantum mechanical evaluations of the Gibbs free energy of the hydrates of sulfuric acid, H2SO4. nH2O and (H2SO4)2 . nH2O to evaluate an empirical surface tension for sulfuric acid-water clusters containing few molecules. We use this surface tension to evaluate nucleation rates using classical heteromolecular theory. At low temperatures (T 213 K) the nucleation rates obtained with the empirical surface tensions are signifi cantly greater than those using bulk values of the surface tension. At higher temperatures the difference disappears.106 222