Other
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19..203s&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 19, Jan. 24, 1992, p. 203-206.
Other
33
Aerosols, Air Pollution, Particle Size Distribution, Sulfates, Sulfuric Acid, Volcanoes, Air Sampling, Balloon-Borne Instruments, Condensation Nuclei, Electron Microscopy
Scientific paper
EM analyses of the aerosol particles are presented with physical and chemical characterizations of the volcanic debris for comparison with data from balloon-borne optical particle counters. Almost all of the fine particles observed in the balloon samples are described as submicron aqueous H2SO4 particles that became (NH4)2SO4 particles with time. Other particles observed with the cascade impactors include large sulfate particles and sulfate/crustal particles of up to 10 microns in diameter. The earlier flights demonstrated greater peak-aerosol concentrations of particles with diameters that exceeded 0.15 micron. These data and the evident lack of condensation nuclei in the particles suggest that the volcanic H2SO4 aerosol formed through homogeneous nucleation processes. The EM-derived data support the data relating to the optical particle counters used on the balloon flights.
Deshler Terry
Hofmann David J.
Schnell Russell C.
Sheridan Patrick J.
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