title: Evidence for the role of ions in aerosol nucleation.
abstract: Aerosol nucleation has been studied experimentally in purified, atmospheric air, containing trace amounts of water vapor, ozone, and sulfur dioxide. The results are compared with model calculations. It is found that an increase in ionization by a factor of 10 increases the production rate of stable clusters by a factor of approximately 3, probably due to ion-induced nucleation.
authors.affiliation: Center for Sun-Climate Research, National Space Institute, Technical University of Denmark, DK-2100 Copenhagen, Denmark.
authors.forename: Martin B
authors.initials: MB
authors.lastname: Enghoff
authors.forename: Jens Olaf Pepke
authors.initials: JO
authors.lastname: Pedersen
authors.forename: Torsten
authors.initials: T
authors.lastname: Bondo
authors.forename: Matthew S
authors.initials: MS
authors.lastname: Johnson
authors.forename: Sean
authors.initials: S
authors.lastname: Paling
authors.forename: Henrik
authors.initials: H
authors.lastname: Svensmark
mesh_terms: D000336:Aerosols / Q000737:chemistry*; D000393:Air Pollutants / Q000737:chemistry; D003198:Computer Simulation; D007477:Ions / Q000737:chemistry; D008956:Models, Chemical; D010126:Ozone / Q000737:chemistry; D010316:Particle Size; D012680:Sensitivity and Specificity; D013458:Sulfur Dioxide / Q000737:chemistry; D013464:Sulfuric Acids / Q000737:chemistry; D014835:Volatilization; D014867:Water / Q000737:chemistry
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D007477:Ions; D013464:Sulfuric Acids; D014867:Water; D013458:Sulfur Dioxide; D010126:Ozone; C033158:sulfuric acid