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| Titel |
Simulation of aerosol optical properties over Europe with a 3-D size-resolved aerosol model: comparisons with AERONET data |
| VerfasserIn |
M. Tombette, P. Chazette, B. Sportisse, Y. Roustan |
| 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 ; 8, no. 23 ; Nr. 8, no. 23 (2008-12-08), S.7115-7132 |
| Datensatznummer |
250006485
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| Publikation (Nr.) |
 copernicus.org/acp-8-7115-2008.pdf |
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| Zusammenfassung |
| This paper aims at presenting a model-to-data comparison of the Aerosol
Optical Thickness (AOT) and of a few sparse data for Single Scattering
Albedo (SSA) over Europe for one year. The main contribution of this paper
is the sensitivity study to a large number of parameters, including physical
and numerical parameters of the aerosol model itself. The optical parameters
are computed from a size-resolved aerosol model embedded in the Polyphemus
system. The methodology is first described, showing that several hypothesis
can be made for micro-physical aerosol properties. The simulation is made
over one year (2001); statistics and monthly time series for the simulation
and AERONET data are used to evaluate the ability of the model to reproduce
AOT and vertically averaged SSA fields and their variability. The relation
with the uncertainties of measurements is discussed. Then a sensitivity study
with respect to the mixing state of the particle, the way to take into account
water uptake, numerical parameters and physical parameterizations of the
model is carried out. The results indicate that the mixing state of particles
has an influence on optical parameters, as well as the computation of the wet
diameter. But some physical and numerical parameters associated with the
aerosol model itself have even more influence under certain conditions,
through the uncertainties on the aerosol chemical composition, and their size distribution. |
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