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| Titel |
A comparative synthesis of satellite-derived and model-simulated aerosol optical depth products in the Mediterranean region: towards a new 4D-reconstruction of the aerosol field |
| VerfasserIn |
P. Nabat, M. Mallet, I. Chiapello, F. Dulac, S. Somot |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250062783
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| Zusammenfassung |
| The Mediterranean region is strongly influenced by the accumulation of aerosols from
different sources : industrial and urban aerosols from Europe, biomass burning from
Eastern Europe, dust and carbon aerosols from Africa, and sea salt from the sea. As
aerosols can have very important effects on the climate through radiative forcing, it is
essential to have the most possible relevant estimation of the atmospheric aerosol
content.
Since the 1980s several spaceborne sensors have retrieved aerosols and provided
measures of the Aerosol Optical Depth (AOD). The present study aims at comparing AOD
climatologies available from the different sensors that provided multi-year monitoring of
aerosol over the Mediterranean basin: CZCS (1978-1986), TOMS/NIMBUS7 (1980-1992),
NOAA/AVHRR (1982-2007), METEOSAT (1984-1997), SeaWiFS (1997-2011),
MISR/TERRA (2000-2011), TERRA/MODIS (2000-2011), AQUA/MODIS (2002-2011),
MERIS/ENVISAT (2002-2010), OMI/AURA (2004-2011), PARASOL (2005-2011) and
SEVIRI/MSG (2005-2011). We also include in our comparison observations from the
AERONET network, as well as AOD climatologies coming from several model data (Tegen,
LMDz-INCA, RegCM, GEMS, and MACC), which allow us to distinguish several aerosol
types.
The comparison shows clear limitations of certain data sets. From the most robust time
series we derive an average seasonal cycle for the various sub-basins of the Mediterranean
region. Model data also enable us to elaborate on the different aerosol types. Finally we
discuss interannual variability, even if some of the trends observed in satellite data may be
attributed to calibration shifts. From this compilation, we propose a 4D blended product from
model and satellite data, consisting in monthly time series of 3D aerosol distribution over
the Mediterranean marine and continental region and the period 2003-2009. This
reconstruction can be used for aerosol radiative forcing in regional climate models. |
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