Ozone anomaly in winter-spring 2019-2020 in the Arctic and over north of Eurasia using data of Aura MLS observations

O. E. Bazhenov; A. V. Nevzorov

doi:10.1117/12.2644741

7 December 2022 Ozone anomaly in winter-spring 2019-2020 in the Arctic and over north of Eurasia using data of Aura MLS observations

O. E. Bazhenov, A. V. Nevzorov

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Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 1234179 (2022) https://doi.org/10.1117/12.2644741
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia

Abstract

In winter-spring 2019-2020 there was the strongest ozone anomaly in the Arctic in the total history of the observations. It was due to extraordinarily strong and long-lasting polar vortex, entailing unprecedented chemical ozone destruction. Analysis of Aura MLS data showed that the minimal temperature was 9-10% below normal from December to April in the stratosphere over Tomsk and the Arctic. Ozone concentration had been 4% and 6% of (i.e., about 30-fold smaller than) the multiyear average at altitude of 20 km on March 27 for Eureka and at altitude of 19 km on April 16 for Ny-Ålesund. This event is within the context of climate changes, leading to cooling of the stratosphere. Until the level of ozone depleting substances in the stratosphere of the Arctic is above the values, expected from implementation of Montreal Protocol, there will be a danger that these events will recur in the future. The 2020 vortex was exclusively isolated, which mitigated appreciably its effect on midlatitudes.

Citation Download Citation

O. E. Bazhenov and A. V. Nevzorov "Ozone anomaly in winter-spring 2019-2020 in the Arctic and over north of Eurasia using data of Aura MLS observations", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 1234179 (7 December 2022); https://doi.org/10.1117/12.2644741

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KEYWORDS

Ozone

Stratosphere

Atmospheric optics

Humidity

Gases

Satellites

Chlorine gas

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