CCN predictions using simplified assumptions of organic aerosol composition and mixing state: a synthesis from six different locations

被引：100

作者：

Ervens, B. ^{[1
,2
]}

Cubison, M. J. ^{[1
]}

Andrews, E. ^{[1
,2
]}

Feingold, G. ^{[2
]}

Ogren, J. A. ^{[2
]}

Jimenez, J. L. ^{[1
,3
]}

Quinn, P. K. ^{[4
]}

Bates, T. S. ^{[4
]}

Wang, J. ^{[5
]}

Zhang, Q. ^{[6
]}

Coe, H.

Flynn, M.

Allan, J. D. ^{[7
]}

机构：

[1] Univ Colorado, CIRES, Boulder, CO 80309 USA

[2] NOAA, Earth Syst Res Lab, Boulder, CO USA

[3] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA

[4] NOAA, Pacific Marine Environm Lab, Seattle, WA 98115 USA

[5] Brookhaven Natl Lab, Upton, NY 11973 USA

[6] Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA

[7] Univ Manchester, Sch Earth Atmospher & Environm Sci, Natl Ctr Atmospher Sci, Manchester M13 9PL, Lancs, England

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2010年 / 10卷 / 10期

关键词：

CLOUD CONDENSATION NUCLEI; SIZE-RESOLVED MEASUREMENTS; HYGROSCOPIC PROPERTIES; CHEMICAL-COMPOSITION; GROWTH; CHEMISTRY; CLOSURE; ACTIVATION; MARINE; CITY;

D O I：

10.5194/acp-10-4795-2010

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An accurate but simple quantification of the fraction of aerosol particles that can act as cloud condensation nuclei (CCN) is needed for implementation in large-scale models. Data on aerosol size distribution, chemical composition, and CCN concentration from six different locations have been analyzed to explore the extent to which simple assumptions of composition and mixing state of the organic fraction can reproduce measured CCN number concentrations. Fresher pollution aerosol as encountered in Riverside, CA, and the ship channel in Houston, TX, cannot be represented without knowledge of more complex (size-resolved) composition. For aerosol that has experienced processing (Mexico City, Holme Moss (UK), Point Reyes (CA), and Chebogue Point (Canada)), CCN can be predicted within a factor of two assuming either externally or internally mixed soluble organics although these simplified compositions/mixing states might not represent the actual properties of ambient aerosol populations, in agreement with many previous CCN studies in the literature. Under typical conditions, a factor of two uncertainty in CCN concentration due to composition assumptions translates to an uncertainty of similar to 15% in cloud drop concentration, which might be adequate for large-scale models given the much larger uncertainty in cloudiness.

引用

页码：4795 / 4807

页数：13

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