The Finnish Meteorological Institute with partners has launched a research project UVEMA focusing on the Effects of UV radiation on MAterials.

The ultimate goals of the UVEMA project is to gain a more profound understanding of the effect of UV radiation and weather conditions on materials and to develop a testing environment comparable to realistic natural ageing conditions.

Internal pages of the project (user-id and password required)


Solar UV radiation has been shown to be one of the outdoor environment components deleterious to a variety of materials. These materials have bond dissociation energies on the wavelength region of UV radiation (280 - 400 nm), leading to a complex set of processes at UV exposure and appearing as photodegradation with the following signs:

o loss of surface gloss;
o discolouring;
o chalking;
o flaking of surface resin;
o pitting;
o microcracking;
o blistering;
o severe loss of resin from outer surface.

In essence, adverse effects of UV radiation considerably limit the lifetime of these materials.

copyright Matti Heikkilä


The project is a joint effort of the Finnish Meteorological Institute, the Helsinki University of Technology and the Tampere University of Technology, Elastopoli Oy, and the following industrial partners:
o Oy All-Plast Ab;
o Exel Oyj;
o MacGregor (FIN) Oy; and
o Nokian Tyres plc.

The following European observatories participate as collaborators in the project:
o Arctic Research Centre, Finnish Meteorological Institute; Sodankylš, Finland
o Jokioinen Observatory, Finnish meteorological Institute; Jokioinen, Finland
o Meteorogical Observatory Lindenberg, German Weather Service; Lindenberg, Germany
o Institute for Health and Consumer Protection, Joint Research Centre; Ispra, Italy
o Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki; Thessaloniki, Greece
o El Arenosillo Sounding Station, National Institute for Aerospace Technology; Huelva, Spain
o Observatorio Atmosphérico de Izaña, Instituto Nacional de Meteorología; Tenerife, Spain

The project is financed by the National Technology Agency (Tekes), the Finnish Meteorological Institute and the industrial partners. The project has been launched on the 1st of May 2005. The project will continue four years.


Research professor Jarkko Koskinen, phone: +358-9-1929 4174
Project manager Anu Heikkila, phone: +358-9-1929 4151
email: firstname.lastname(at)fmi.fi

Last updated Oct 28, 2005 by Anu Heikkilä