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| Titel |
Aerosol forecast over the Mediterranean area during July 2013 (ADRIMED/CHARMEX) |
| VerfasserIn |
L. Menut, G. Rea, S. Mailler, D. Khvorostyanov, S. Turquety |
| 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. 14 ; Nr. 15, no. 14 (2015-07-17), S.7897-7911 |
| Datensatznummer |
250119908
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| Publikation (Nr.) |
 copernicus.org/acp-15-7897-2015.pdf |
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| Zusammenfassung |
| The ADRIMED (Aerosol Direct Radiative Impact on the regional climate
in the MEDiterranean region) project was dedicated to study the atmospheric composition during
the summer 2013 in the European Mediterranean region. During its campaign
experiment part, the WRF (Weather Research and Forecast Model) and CHIMERE models were used in the forecast mode in
order to decide whether intensive observation periods should be triggered.
Each day, a simulation of 4 days was performed, corresponding to (D-1) to
(D+2) forecast leads. The goal of this study was to determine whether the
model forecast spread is lower or greater than the model biases compared to
observations. It is shown that the differences between observations and the
model are always higher than those between the forecasts. Among all forcing
types used in the chemistry-transport model, it is shown that the strong bias
and other related low forecast scores are mainly due to the forecast accuracy
of the wind speed, which is used both for the mineral dust emissions (a
threshold process) and for the long-range transport of aerosol: the surface
wind speed forecast spread can reach 50%, leading to mineral dust
emission forecast spread of up to 30%. These variations are responsible
for a moderate forecast spread of the surface PM10 (a few percentage points) and
for a large spread (more than 50%) in the mineral dust concentration at
higher altitudes, leading to a mean AOD (aerosol optical depth) forecast spread of ±10%. |
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