Articles | Volume 21, issue 2
https://doi.org/10.5194/acp-21-617-2021
https://doi.org/10.5194/acp-21-617-2021
Research article
 | 
18 Jan 2021
Research article |  | 18 Jan 2021

Record low ozone values over the Arctic in boreal spring 2020

Martin Dameris, Diego G. Loyola, Matthias Nützel, Melanie Coldewey-Egbers, Christophe Lerot, Fabian Romahn, and Michel van Roozendael

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Latest update: 12 Oct 2024
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Short summary
Record low ozone values were observed in March 2020. Dynamical and chemical circumstances leading to low ozone values in spring 2020 are discussed and are compared to similar dynamical conditions in the Northern Hemisphere in 1996/1997 and 2010/2011. 2019/2020 showed an unusual persistent polar vortex with low stratospheric temperatures, which were permanently below 195 K at 50 hPa. This enabled enhanced formation of polar stratospheric clouds and a subsequent clear reduction of total ozone.
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