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| Titel |
Simulation of the mineral dust content over Western Africa from the event to the annual scale with the CHIMERE-DUST model |
| VerfasserIn |
C. Schmechtig, B. Marticorena, B. Chatenet, G. Bergametti, J. L. Rajot, A. Coman |
| 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 ; 11, no. 14 ; Nr. 11, no. 14 (2011-07-22), S.7185-7207 |
| Datensatznummer |
250009940
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| Publikation (Nr.) |
 copernicus.org/acp-11-7185-2011.pdf |
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| Zusammenfassung |
| The chemistry and transport model CHIMERE-DUST have been used to simulate the
mineral dust cycle over the Sahara in 2006. Surface measurements deployed
during the AMMA field campaign allow to test the capability of the model to
correctly reproduce the atmospheric dust load and surface concentrations from
the daily to the seasonal time-scale. The simulated monthly mean Aerosol
Optical Depths (AOD) and surface concentrations are significantly correlated
with the measured ones. The simulated daily concentrations and hourly AOD are
in the same range of magnitude than the observed ones despite relatively high
simulated dust emissions. The level of agreement between the simulations and
the observations has been quantified at different time scales using
statistical parameters classically used to evaluate air quality models. The
capability of the model to reproduce the altitude of the dust transport was
tested for two contrasted cases of low and high altitude transport. These
results highlight the sensitivity of the simulations to the surface winds
used as external forcing and the necessity to further constrain the dust mass
budget at the regional scale. |
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