Steven C. Hardiman

TL;DR: Sudden stratospheric warmings (SSWs) are large, rapid temperature rises in the winter polar stratosphere, occurring predominantly in the Northern Hemisphere as discussed by the authors, and are associated with a reversal of the climatological westerly zonal-mean zonal winds.

TL;DR: Sudden stratospheric warmings (SSWs) are large, rapid temperature rises in the winter polar stratosphere, occurring predominantly in the Northern Hemisphere as mentioned in this paper, and are associated with a reversal of the climatological westerly zonal-mean zonal winds.

TL;DR: In this paper, the impacts of climate change, stratospheric ozone recovery, and methane increases on surface ozone and the tropospheric oxidizing capacity by 2050 were compared using a stratosphere-troposphere chemistry-climate model.

TL;DR: In this paper, the authors analyzed the stratospheric Kelvin and Rossby-gravity wave packets with periods of a few days in nine high-top models of the Coupled Model Intercomparison Project (CMIP5).

TL;DR: In this paper, the response of the stratospheric circulation to a perturbation to the zonal mean flow applied above some level zc in the extratropical middle or upper stratosphere is considered, focusing in particular on the possibility that there is a significant response in the lower stratosphere.