Exceptional loss in ozone in the Arctic winter/spring of 2019/2020

Abstract. Severe vortex-wide ozone loss in the Arctic would expose both ecosystems and several millions of people to unhealthy ultraviolet radiation. Adding these worries, extreme events as harbingers climate change, exceptionally low with column values below 220 DU occurred over March April 2020. Sporadic occurrences less than at different regions vortex for almost 3 weeks were found first time observed history Arctic. Furthermore, a large about 2.0–3.4 ppmv triggered by an unprecedented chlorine activation (1.5–2.2 ppbv) matching levels occurring Antarctic was also observed. The polar processing situation led first-ever appearance saturation Apart from these, there ozone-mini holes December 2019 January 2020 driven atmospheric dynamics. colder winters is intriguing demands rigorous monitoring region.