Contribution of particle formation to global cloud condensation nuclei concentrations

Details Contribution of particle formation to global cloud condensation nuclei concentrations Contribution of particle formation to global cloud condensation nuclei concentrations

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3506808s&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 6, CiteID L06808

Physics

88

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions (0426, 1610), Atmospheric Composition And Structure: Troposphere: Composition And Chemistry, Atmospheric Composition And Structure: Pollution: Urban And Regional (0305, 0478, 4251)

Scientific paper

We use a global aerosol microphysics model to predict the contribution of boundary layer (BL) particle formation to regional and global distributions of cloud condensation nuclei (CCN). Including an observationally derived particle formation scheme, where the formation rate of molecular clusters is proportional to gas-phase sulfuric acid to the power one, improves modeled particle size distribution and total particle number concentration at three continental sites in Europe. Particle formation increases springtime BL global mean CCN (0.2% supersaturation) concentrations by 3-20% and CCN (1%) by 5-50%. Uncertainties in particle formation and growth rates must be reduced before the accuracy of these predictions can be improved. These results demonstrate the potential importance of BL particle formation as a global source of CCN.

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