Molar mass, surface tension, and droplet growth kinetics of marine organics from measurements of CCN activity

被引：55

作者：

Moore, R. H. ^{[1
]}

Ingall, E. D. ^{[2
]}

Sorooshian, A. ^{[3
]}

Nenes, A. ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA

[2] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA

[3] CALTECH, Dept Chem Engn, Pasadena, CA 91125 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2008年 / 35卷 / 07期

关键词：

D O I：

10.1029/2008GL033350

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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.

引用

页数：5

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