Articles | Volume 22, issue 6
Atmos. Chem. Phys., 22, 4187–4200, 2022
https://doi.org/10.5194/acp-22-4187-2022
Atmos. Chem. Phys., 22, 4187–4200, 2022
https://doi.org/10.5194/acp-22-4187-2022
Research article
31 Mar 2022
Research article | 31 Mar 2022

Evolution of the intensity and duration of the Southern Hemisphere stratospheric polar vortex edge for the period 1979–2020

Audrey Lecouffe et al.

Data sets

ERA-Interim ECMWF https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/era-interim

Monthly averages of Solar 10.7 cm flux National Research Council Canada (Dominion Radio Astrophysical Observatory) ftp://ftp.seismo.nrcan.gc.ca/spaceweather/solar_flux/monthly_averages/solflux_monthly_average.txt

Monthly mean zonal wind components Institute of Meteorology, Freie Unversistät Berlin https://www.geo.fu-berlin.de/met/ag/strat/produkte/qbo/qbo.dat

Multivariate ENSO Index Version 2 (MEI.v2) NOAA https://www.esrl.noaa.gov/psd/enso/mei

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Short summary
This study uses a model developped at LATMOS (France) to analyze the behavior of the Antarctic polar vortex from 1979 to 2020 at 675 K, 550 K, and 475 K isentropic levels. We found that the vortex edge intensity is stronger during the September–October–November period, while its edge position is less extended during this period. The polar vortex is stronger and lasts longer during solar minimum years. Breakup dates of the polar vortex are linked to the ozone hole and maximum wind speed.
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