Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 35, Issue 7, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2008GL033350
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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 (NH(4))(2)SO(4), but droplet growth kinetics are similar. Kohler 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.
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