Abstract
In this work, we show a trend of lengthening the period of high intensity of the Antarctic polar vortex in late spring and early summer (November–December), which has been traced over the past 30 years. This trend is observed both in the dynamics of the main characteristics of the polar vortex (vortex area and wind speed along the vortex edge) and in the Antarctic ozone hole area. A clear manifestation of this is the polar vortex dynamics in 2020, when there were unusually high wind speeds along the vortex edge throughout the entire period of its existence and record values of vortex area and ozone hole area from mid-November to December. In addition, the polar vortex existed until the last week of December, which is an unprecedented case. To analyze the Antarctic polar vortex dynamics, we used the vortex delineation method by geopotential values determined from the maximum temperature gradient and maximum wind speed characterizing the vortex edge.
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