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This paper presents a methodology for mapping the ultraviolet radiation (UV) with a spatial resolution of approximately 5km and potentially on a half hourly basis. It consists in using a standard radiative transfer code and in exploiting various sources of information to assign values to the influencing parameters. GOME total column ozone data are used for the total column ozone. The attenuation of radiation by clouds is estimated using the MVIRI/METEOSAT visible channel data. In practise for each METEOSAT pixel, a cloud liquid water path is derived from the enhancement of the signal with respect to the cloudless situation. Other influencing factors taken into account include the tropospheric aerosols, the surface elevation and the enhancement of the UV surface albedo in presence of snow. First results on maps at the European scale are presented. A preliminary comparison of the satellite derived surface UV irradiance with the measurements performed at the Environment Institute in Ispra is also discussed.

Additional information

Authors: VERDEBOUT J, SAI Ispra (IT)
Bibliographic Reference: Paper presented: European Symposium on Atmospheric Measurements from Space, (NO), 18-22nd January, 1999
Availability: Available from Public Relations and Publications Unit, Ispra (IT)
Record Number: 199910816 / Last updated on: 1999-06-07
Original language: en
Available languages: en