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| Titel |
Putting the clouds back in aerosol–cloud interactions |
| VerfasserIn |
A. Gettelman |
| 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 ; 15, no. 21 ; Nr. 15, no. 21 (2015-11-09), S.12397-12411 |
| Datensatznummer |
250120149
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| Publikation (Nr.) |
 copernicus.org/acp-15-12397-2015.pdf |
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| Zusammenfassung |
| Aerosol–cloud interactions (ACI)
are the consequence of perturbed aerosols affecting cloud drop and crystal
number, with corresponding microphysical and radiative effects. ACI are
sensitive to both cloud microphysical processes (the "C" in ACI) and
aerosol emissions and processes (the "A" in ACI). This work highlights the
importance of cloud microphysical processes, using idealized and global tests
of a cloud microphysics scheme used for global climate prediction.
Uncertainties in key cloud microphysical processes examined with sensitivity
tests cause uncertainties of nearly −30 to +60 % in ACI, similar to or
stronger than uncertainties identified due to natural aerosol emissions
(−30 to +30 %). The different dimensions and sensitivities of ACI to
microphysical processes identified in previous work are analyzed in detail,
showing that precipitation processes are critical for understanding ACI and
that uncertain cloud lifetime effects are nearly one-third of simulated ACI.
Buffering of different processes is important, as is the mixed phase and
coupling of the microphysics to the condensation and turbulence schemes in
the model. |
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