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Rapport

Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual Report 2020.

Svendby, Tove; Hansen, Georg H.; Bäcklund, Are; Nilsen, Anne-Cathrine; Schulze, Dorothea; Johnsen, Bjørn

Publikasjonsdetaljer

Serie: NILU rapport 18/2021

Utgiver: NILU

År: 2021

ISBN: 978-82-425-3051-6

Arkiv: hdl.handle.net/11250/2779129

Sammendrag:
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. 2020 was characterized by a strong, cold, and persistent Arctic stratospheric vortex, leading to extensive formation of Polar Stratospheric Clouds (PSCs, mother-of-pearl clouds) and chemical ozone destruction with very low ozone values and high UV levels in the exposed regions in the spring.