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| Titel |
The effect of harmonized emissions on aerosol properties in global models – an AeroCom experiment |
| VerfasserIn |
C. Textor, M. Schulz, S. Guibert, S. Kinne, Y. Balkanski, S. Bauer, T. Berntsen, T. Berglen, O. Boucher, M. Chin, F. Dentener, T. Diehl, J. Feichter, D. Fillmore, P. Ginoux, S. Gong, A. Grini, J. Hendricks, L. Horowitz, P. Huang, I. S. A. Isaksen, T. Iversen, S. Kloster, D. Koch, A. Kirkevåg, J. E. Kristjánsson, M. Krol, A. Lauer, J. F. Lamarque, X. Liu, V. Montanaro, G. Myhre, J. E. Penner, G. Pitari, M. 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 ; 7, no. 17 ; Nr. 7, no. 17 (2007-08-30), S.4489-4501 |
| Datensatznummer |
250005178
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| Publikation (Nr.) |
 copernicus.org/acp-7-4489-2007.pdf |
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| Zusammenfassung |
The effects of unified aerosol sources on global aerosol fields
simulated by different models are examined in this paper. We compare
results from two AeroCom experiments, one with different (ExpA) and
one with unified emissions, injection heights, and particle sizes at
the source (ExpB). Surprisingly, harmonization of aerosol sources has
only a small impact on the simulated inter-model diversity of the
global aerosol burden, and consequently global optical properties, as
the results are largely controlled by model-specific transport,
removal, chemistry (leading to the formation of secondary aerosols)
and parameterizations of aerosol microphysics (e.g., the split between
deposition pathways) and to a lesser extent by the spatial and
temporal distributions of the (precursor) emissions.
The burdens of black carbon and especially sea salt become more coherent in
ExpB only, because the large ExpA diversities for these two species were caused
by a few outliers. The experiment also showed that despite prescribing
emission fluxes and size distributions, ambiguities in the implementation in
individual models can lead to substantial differences.
These results indicate the need for a better understanding of aerosol life
cycles at process level (including spatial dispersal and interaction with
meteorological parameters) in order to obtain more reliable results from
global aerosol simulations. This is particularly important as such model
results are used to assess the consequences of specific air pollution
abatement strategies. |
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