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| Titel |
Constraints on interactions between aerosols and clouds on a global scale from a combination of MODIS-CERES satellite data and climate simulations |
| VerfasserIn |
X. Ma, K. Salzen, J. Cole |
| 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. 20 ; Nr. 10, no. 20 (2010-10-19), S.9851-9861 |
| Datensatznummer |
250008838
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| Publikation (Nr.) |
 copernicus.org/acp-10-9851-2010.pdf |
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| Zusammenfassung |
| Satellite-based cloud top effective radius retrieved by the CERES Science
Team were combined with simulated aerosol concentrations from CCCma CanAM4 to
examine relationships between aerosol and cloud that underlie the first
aerosol indirect (cloud albedo) effect. Evidence of a strong negative
relationship between sulphate, and organic aerosols, with cloud top effective
radius was found for low clouds, indicating both aerosol types are
contributing to the first indirect effect on a global scale. Furthermore,
effects of aerosol on the cloud droplet effective radius are more pronounced
for larger cloud liquid water paths. While CanAM4 broadly reproduces the
observed relationship between sulphate aerosols and cloud droplets, it does
not reproduce the dependency of cloud top droplet size on organic aerosol
concentrations nor the dependency on cloud liquid water path. Simulations
with a modified version of the model yield a more realistic dependency of
cloud droplets on organic carbon. The robustness of the methods used in the
study are investigated by repeating the analysis using aerosol simulated by
the GOCART model and cloud top effective radii derived from the MODIS Science
Team. |
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