Aerosol retrievals from METEOSAT-8 - CM SAF
Aerosol retrievals from METEOSAT-8 - CM SAF
Aerosol retrievals from METEOSAT-8 - CM SAF
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>SAF</strong> on Climate Monitoring Visiting Scientists Report Doc. No: 1.0<br />
Issue : 1.0<br />
Date : 4 October 2006<br />
<strong>retrievals</strong> of two LAND-<strong>SAF</strong> products i.e.: the surface albedo product and the Down Welling<br />
Shortwave Radiation Flux product.<br />
The Albedo and the Down Welling surface short-wave radiation flux (DSSF) product are generated<br />
each day at the full spatial resolution of the MSG/SEVIRI instrument. Both products are based on<br />
the three short-wave channels (VIS 0.6µm, NIR 0.8µm, SWIR 1.6µm). For cloud screening the<br />
cloud masks derived with the Nowcasting and Very Short Range Forecasting Satellite Application<br />
Facility (NWC <strong>SAF</strong>) software are used. Dynamic information on the atmospheric pressure and<br />
water vapour content comes <strong>from</strong> the E<strong>CM</strong>WF numerical weather prediction model, whereas<br />
climatologic values are used for ozone concentration and aerosol optical thickness.<br />
The largest uncertainties in the albedo and the DSSF flux product are non-detected clouds and<br />
systematic errors in the aerosol optical thickness values. Since the aerosol optical thicknesses are<br />
obtained <strong>from</strong> a climatologic database, the quality of both products can be improved by using a<br />
satellite derived aerosol product. More information on the Land-<strong>SAF</strong> can be found on<br />
https://landsaf.meteo.pt/.<br />
4.2.4 O&SI <strong>SAF</strong><br />
The Ocean & Sea Ice Satellite Application Facility (O&SI <strong>SAF</strong>) provides information for the ocean<br />
on surface temperatures, ice coverage, radiation fluxes and surface winds. This <strong>SAF</strong> needs<br />
information on aerosols for mapping of ocean surface reflectances and radiation fluxes. More<br />
information on the O&SI <strong>SAF</strong> can be found on http://www.osi-saf.org.<br />
4.3 Cooperation with other <strong>SAF</strong>s<br />
The <strong>CM</strong>-<strong>SAF</strong> aims to continue developing retrieval algorithms for parameters that are considered<br />
important for climate monitoring. A new development could be an aerosol product <strong>from</strong> SEVIRI.<br />
Such a development could be a federate <strong>SAF</strong> activity.<br />
At the <strong>CM</strong>-<strong>SAF</strong> data user conference in Nurnberg, Germany, September 2005 the author of this<br />
report presented the preliminary results of the study on aerosol <strong>retrievals</strong> <strong>from</strong> <strong>METEOSAT</strong>-8.<br />
Based on the results of this presentation the plan came up to develop aerosol optical thickness and<br />
aerosol type products <strong>from</strong> MSG/SEVIRI and GOME in the framework of a federate <strong>SAF</strong> activity.<br />
- 7 -