Printed in Great Britain 0021~8502/98 $19.00 + 0.00 Evidence For New Sulfate Particle Formation In The Remote Troposphere Involving Biogenic Trace Gas Species

• Main Authors: R. J. Webert, P. H. Mcmurry, F. L. Eisele, L. Mauldin, D. Tanner
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Tropospheric aerosols; Nanoparticles; Homogeneous nucleation; Sulfuric acid Findings from earlier field studies (Weber et al; 1995; Weber et al; 1997) showed; Macquarie Island
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.5431; http://www.ecd.bnl.gov/pubs/BNL-65387AB.pdf

that rates of new particle formation in the remote troposphere can be significantly higher than those predicted by classical heteromolecular sulfuric acid- water (H$04-H20) nucleation theory (Jaecker-Voirol and Mirabel, 1989). We have speculated that higher rates may be due to the participation of ammonia (NH3) through a ternary mechanism involving H#04-NH3-Hz0 (Weber et al., 1996). Airborne measurements made in the vicinity of Macquarie Island during the first Aerosol Characterization Experiment (ACE 1) support the hypothesis that participation of additional species can result in particle formation rates that significantly exceed rates for H$S04-Hz0 nucleation (Weber et al., 1998a). ACE 1 airborne measurements pertinent to studies of new particle formation included various meteorological parameters, gas phase H2SO4 and H20, and nanoparticle size distributions (-3 to 10 nm diameter). Nanoparticle concentrations were determined from the photo detector pulse heights of an Ultrafine Condensation Particle Counter (Weber et al.