Dynamic Processes of the Arctic Stratosphere in the 2020–2021 Winter

Abstract: The Arctic stratosphere winter season of 2020–2021 was characterized by a weakened stratospheric polar vortex as a result of a major sudden stratospheric warming (SSW) in early January. After the SSW, which persisted for about 3 weeks, and until the end of the winter season, the lower stratosphere temperature inside the stratospheric polar vortex remained higher than required for the formation of polar stratospheric clouds