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Rapport/avhandling

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

Publikasjon: Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual Report 2020.
Serie: NILU rapport, 18/2021
År: 2021
Utgiver: NILU, Kjeller
ISBN: 978-82-425-3051-6
Lenke: Institusjonsarkiv

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.