||Observations of the Modification of Cloud Condensation Nuclei in Wave Clouds.
Hegg, Dean A. ;
Hobbs, Peter V. ;
Radke, Lawrence F. ;
||Washington Univ., Seattle. Dept. of Atmospheric Sciences.;Environmental Sciences Research Lab., Research Triangle Park, NC.
||CONTRIB-560; PHS-HS-805263; EPA-600/J-80-359;
Condensation nuclei ;
Particle size ;
Chemical reactions ;
Sulfur dioxide ;
||Some EPA libraries have a fiche copy filed under the call number shown.
Measurements are presented which show enhanced concentrations of cloud condensation nuclei, active at various supersaturations, downwind of wave clouds. Concurrent measurements of particle size spectra corroborate these measurements and suggest particle growth within the clouds. Modifications in the particle size spectra are most pronounced at diameters of approximately 1 micrometer. Measurements and modeling results suggest these observations can be explained by sulfate production in clouds.