Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual Report 2018.

This report summarizes the results from the Norwegian monitoring programme on stratospheric ozone and UV radiation
measurements. The ozone layer has been measured at three locations since 1979: in Oslo, Tromsø/Andøya and Ny-Ålesund.
The UV measurements started in 1995. The results show that there was a significant decrease in stratospheric ozone above
Norway between 1979 and 1997. After that the ozone layer stabilized at a level ~2% below pre-1980 level. 2018 was
characterized by low summer ozone values in Oslo and a record high annual integrated UV-dose.