Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3507801m&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 7, CiteID L07801
Physics
18
Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Air/Sea Constituent Fluxes (3339, 4504), Atmospheric Composition And Structure: Cloud Physics And Chemistry, Biogeosciences: Marine Systems (4800), Atmospheric Processes: Clouds And Aerosols
Scientific paper
The CCN-relevant properties and droplet growth kinetics are determined for marine organic matter isolated from seawater collected near the Georgia coast. The organic matter is substantially less CCN active than (NH4)2SO4, but droplet growth kinetics are similar. Köhler Theory Analysis (KTA) is used to determine the average organic molar masses of two samples, which are 4370 +/- 24% and 4340 +/- 18% kg kmol-1. KTA is used to infer surface tension depression, which is in excellent agreement with direct measurements. For the first time it is shown that direct measurements of surface tension are relevant for CCN activation, and this study highlights the power of KTA.
Ingall Ellery D.
Moore Richard H.
Nenes Athanasios
Sorooshian Armin
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