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Rapporten presenterer måledata for totalozon, vertikalfordelingen av ozon og UV-stråling over norske målestasjoner i 2003. For Oslo og Andøya er trenden i totalozon beregnet for perioden 1979-2003.

Norwegian Institute for Air Research (NILU) co-ordinates on behalf of the ENSIS group (NILU, NIVA, Norgit) a project for Yantai Municipal Science and Technology Commission, China, regarding installation of an Environmental Surveillance and Information System (ENSIS). This system consists of modules for air and water monitoring and management. The Norwegian side is funded by NORAD. The project started in November 1996and will last for three years. This workshop report describes the costs the activities performed during the second workshop in Yantai 3-7 November 1997

Norwegian Institute for Air Research (NILU) carries out on behalf of the ENSIS group (NILU, NIVA, Norgit) a project for Yantai Municipal Science and Technology Commission, China, regarding installation of an Environmental Surveillance and Information System (ENSIS). This system consists of modules for air and water monitoring and management. The Norwegian side is funded by NORAD. The project started in November 1996 and will last for three years. This annual report for 1997 describes the project work and the costs for 1997 and a revised plan for 1998.

The Norwegian scientific participation in the Eureka project EUROTRAC 1986-1990 is documented in the report. The main Norwegian activity is centered within TOR (Tropospheric Ozone Research) where measurements are carried. out at Birkenes and Ny-Ålesund on svalbard, and model calculations are done in support of the measurements to interpret atmospheric chemical change both on a European and global scale. There is also Norwegian contributions in Lactoz, Halipp, Glomac and Eumac.

A description of the NILU tracer technique used in Teruel, and a presentation of all SF6 concentrations measured from the ground level sampling stations is presented.