Variation of marine aerosol acidity with particle size

Details Variation of marine aerosol acidity with particle size Variation of marine aerosol acidity with particle size

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29g...5k&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 7, pp. 5-1, CiteID 1101, DOI 10.1029/2001GL013881

Physics

14

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Air/Sea Constituent Fluxes (3339, 4504), Atmospheric Composition And Structure: Troposphere-Composition And Chemistry

Scientific paper

pHs were measured in minimally diluted extracts of size-segregated aerosols sampled under moderately polluted conditions at Bermuda during spring 1997. Extrapolation to aerosol liquid water contents yielded ambient pHs for most super-μm diameter size fractions in the upper 3s to upper 4s. Aerosols within this size range of each sample approached similar pH. These results are consistent with recent estimates of sea-salt aerosol pHs based on thermodynamic considerations and model calculations. Most pHs for finer aerosol size fractions were in the 1s and 2s. The H+ + SO42- <-> HSO4- equilibrium strongly buffered aerosol pH in all size fractions.

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