Aerosol retrievals from METEOSAT-8 - CM SAF
Aerosol retrievals from METEOSAT-8 - CM SAF
Aerosol retrievals from METEOSAT-8 - CM SAF
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<strong>SAF</strong> on Climate Monitoring Visiting Scientists Report Doc. No: 1.0<br />
Issue : 1.0<br />
Date : 4 October 2006<br />
13:00 UTC 14:00 UTC<br />
15:00 UTC 16:00 UTC<br />
17:00 UTC 18:00 UTC<br />
Figure 11: <strong>Aerosol</strong> optical thickness at 670nm over Europe <strong>from</strong> 05:00 UTC till 18:00 UTC the<br />
14 th July 2005 in the SEVIRI channel 1. The color scale is <strong>from</strong> 0.00 (dark blue) till 0.40 (red).<br />
6.1.5 Results and Comparison with AERONET and MODIS<br />
The AOT <strong>retrievals</strong> over the period 1 – 14 July 2005 were compared for several days to AERONET<br />
measurements at Toulouse (France), Ispra (Italy), Blida (Algeria) and El Arenosillo (Spain). AOT's<br />
<strong>from</strong> MSG have been averaged within a 5x5 pixels area around the AERONET stations. In general,<br />
the AERONET and MSG retrieved AOT values for cloud-free areas correlate reasonably well and<br />
are in the same order of magnitude. However, MSG tends to under-estimate AOT, which is<br />
probably due to an overestimation of the surface reflectance. The latter could be caused by residual<br />
aerosol loadings in the surface reflectance values that are not corrected for in the current retrieval<br />
scheme.<br />
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