Title: Modelling Natural Surface UV Radiation with METEOSAT and MSG
Citation: Proceedings of the 3rd MSG RAO Workshop vol. SP-619 p. 65-70
Publisher: European Space Agency Publications Division
Publication Year: 2006
JRC N°: JRC32976
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC32976
Type: Articles in periodicals and books
Abstract: The method for modelling surface UV radiation basically consists in using a standard radiative transfer code (UVspec) and in exploiting various sources of information to assign values to the parameters influencing the surface UV radiation. GOME, TOMS or TOVS data are used for the total column ozone. The tropospheric aerosols are taken into account by using observations at ground meteorological stations and the surface altitude by means of a digital elevation model. METEOSAT or MSG are used to derive cloud optical thickness and surface UV albedo (in particular in presence of snow). The algorithm originally using the VIS and IR bands of METEOSAT has been adapted and improved. It now exploits the signal in the VIS006, IR_016 and IR_120 of MSG and yields a better cloud/snow discrimination. With MSG, the climatological data set of UV daily doses over Europe, starting in January 1984, could be continued to present. This data set was used in an impact study of UV radiation on the codfish population strength in the northern Atlantic (UVAC project). Extracts of it were delivered to external partners to support other impact studies such as UV effects on crop yield, exposure of schoolchildren or vitamin D deficiency assessments. Data were also provided to compare with ground measurements at a number of stations and included in studies of local UV conditions. In COST Action 726 (Long term changes and climatology of UV radiation over Europe) they are used in the attempt of reconstructing the UV conditions over Europe back to the fifties. At JRC, they also constitute a major input to a human UV exposure model. With MSG data acquisition via Eumetcast, a version of the processor was developed to generate near-real time UV index maps over Europe. This software has been installed at the Medical University of Innsbruck and at the Aristoteles University of Thessaloniki for producing the publicly available UV index maps for Austria and Greece.
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