Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2021.

• Main Authors: Svendby, Tove Marit, Hansen, Georg H., Bernet, Leonie, Bäcklund, Are, Nilsen, Anne-Cathrine, Schulze, Dorothea, Johnsen, Bjørn
• Format: Report
• Language: English
• Published: NILU 2022
• Subjects: Stratospheric ozone; UV radiation; Measurements and observations; Montreal protocol; Andøya; Norway; Ny-Ålesund; Tromsø; Ny Ålesund
• Online Access: https://hdl.handle.net/11250/3018853

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/Kjeller, 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. The year 2021 was characterized by low total ozone values in June and July, whereas “normal” ozone values were measured during winter and spring. publishedVersion