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| Titel |
Empirical estimates of CCN from aerosol optical properties at four remote sites |
| VerfasserIn |
A. Jefferson |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 14 ; Nr. 10, no. 14 (2010-07-23), S.6855-6861 |
| Datensatznummer |
250008658
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| Publikation (Nr.) |
 copernicus.org/acp-10-6855-2010.pdf |
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| Zusammenfassung |
| This study presents an empirical method to estimate the CCN concentration as
a function of percent supersaturation. The aerosol optical properties,
backscatter fraction and single scatter albedo, function as proxies for the
aerosol size and composition in a power law relationship to CCN. This method
is tested at four sites with aged aerosol: SGP (Oklahoma, USA), FKB (Black
Forest, Germany), HFE (Hefei, China) and GRW (Graciosa, Azores). Each site
represents a different aerosol type and thus demonstrates the method
robustness and limitations. Good agreement was found between the calculated
and measured CCN with slopes between 0.81 and 1.03 and correlation
coefficients (r2 values) between 0.59 and 0.67. The fit quality
declined at low CCN concentrations. |
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