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Journal Articles Geophysical Research Letters Year : 2020

Antarctic ozone enhancement during the 2019 sudden stratospheric warming event

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Sarah Safieddine
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Marie Bouillon
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  • PersonId : 1052293
Ana Claudia Parracho
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  • PersonId : 981269
Julien Jumelet
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  • PersonId : 971747
Florent Tencé
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Andrea Pazmino
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Florence Goutail
Slimane Bekki
Anne Boynard
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Juliette Hadji-Lazaro
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  • PersonId : 915259

Abstract

We analyze the 2019 sudden stratospheric warming event that occurred in the Southern Hemisphere through its impact on the Antarctic ozone. Using temperature, ozone, and nitric acid data from the Infrared Atmospheric Sounding Interferometer (IASI), our results show that the average increase in stratospheric temperature reached a maximum of 34.4° on September 20th in the [60‐90]°S latitude range when compared to the past three years. Dynamical parameters suggest a locally‐reversed and weakened zonal winds and a shift in the location of the polar jet vortex. This led to air masses mixing, to a reduced polar stratospheric clouds formation detected at a ground station, and as such to lower ozone and nitric acid depletion. 2019 total ozone columns for the months of September, October, and November, were on average higher by 29%, 28%, and 26% respectively when compared to the 11‐year average of the same months.
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Dates and versions

insu-02881549 , version 1 (19-07-2020)

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Sarah Safieddine, Marie Bouillon, Ana Claudia Parracho, Julien Jumelet, Florent Tencé, et al.. Antarctic ozone enhancement during the 2019 sudden stratospheric warming event. Geophysical Research Letters, 2020, 47 (14), pp.e2020GL087810. ⟨10.1029/2020GL087810⟩. ⟨insu-02881549⟩
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