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Antarctic Ozone Enhancement During the 2019 Sudden Stratospheric Warming Event
Author(s) -
Safieddine Sarah,
Bouillon Marie,
Paracho AnaClaudia,
Jumelet Julien,
Tencé Florent,
Pazmino Andrea,
Goutail Florence,
Wespes Catherine,
Bekki Slimane,
Boynard Anne,
HadjiLazaro Juliette,
Coheur PierreFrançois,
Hurtmans Daniel,
Clerbaux Cathy
Publication year - 2020
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2020gl087810
Subject(s) - polar vortex , stratosphere , ozone depletion , ozone , atmospheric sciences , environmental science , sudden stratospheric warming , ozone layer , climatology , polar night , northern hemisphere , polar , depth sounding , southern hemisphere , atmospheric sounding , meteorology , geology , physics , oceanography , astronomy
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 20 September in the [60–90]°S latitude range when compared to the past 3 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.