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| Titel |
An AeroCom initial assessment – optical properties in aerosol component modules of global models |
| VerfasserIn |
S. Kinne, M. Schulz, C. Textor, S. Guibert, Y. Balkanski, S. E. Bauer, T. Berntsen, T. F. Berglen, O. Boucher, M. Chin, W. Collins, F. Dentener, T. Diehl, R. Easter, J. Feichter, D. Fillmore, S. Ghan, P. Ginoux, S. Gong, A. Grini, J. Hendricks, M. Herzog, L. Horowitz, I. Isaksen, T. Iversen, A. Kirkevåg, S. Kloster, D. Koch, J. E. Kristjánsson, M. Krol, A. Lauer, J. F. Lamarque, G. Lesins, X. Liu, U. Lohmann, V. Montanaro, G. Myhre, J. Penner, G. Pitari, S. Reddy, Ø. Seland, P. Stier, T. Takemura, X. Tie |
| 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 ; 6, no. 7 ; Nr. 6, no. 7 (2006-05-29), S.1815-1834 |
| Datensatznummer |
250003889
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| Publikation (Nr.) |
 copernicus.org/acp-6-1815-2006.pdf |
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| Zusammenfassung |
| The AeroCom exercise diagnoses multi-component aerosol modules in global
modeling. In an initial assessment simulated global distributions for mass
and mid-visible aerosol optical thickness (aot) were compared among 20
different modules. Model diversity was also explored in the context of
previous comparisons. For the component combined aot general agreement has
improved for the annual global mean. At 0.11 to 0.14, simulated aot values
are at the lower end of global averages suggested by remote sensing from
ground (AERONET ca. 0.135) and space (satellite composite ca. 0.15). More
detailed comparisons, however, reveal that larger differences in regional
distribution and significant differences in compositional mixture remain. Of
particular concern are large model diversities for contributions by dust and
carbonaceous aerosol, because they lead to significant uncertainty in
aerosol absorption (aab). Since aot and aab, both, influence the aerosol
impact on the radiative energy-balance, the aerosol (direct) forcing
uncertainty in modeling is larger than differences in aot might suggest. New
diagnostic approaches are proposed to trace model differences in terms of
aerosol processing and transport: These include the prescription of common
input (e.g. amount, size and injection of aerosol component emissions) and
the use of observational capabilities from ground (e.g. measurements
networks) or space (e.g. correlations between aerosol and clouds). |
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