Joan E. Rosenfield

TL;DR: In this article, the authors defined the vortex boundary region to be at the local maximum convex and concave curvature in the Ertel's potential vorticity distribution surrounding the edge, and determined the onset and breakup dates of the vortex on the 450 K isentropic surface.

TL;DR: In this article, a comparative analysis of the 1987 Southern Hemisphere and 1989 Northern Hemisphere lower stratospheric, polar vortex circulation and constituent distributions as observed by the Airborne Antarctic Ozone Experiment, August 17-September 22, 1987, and Airborne Arctic Stratospheric Expedition, January 3-February 19, 1989 aircraft campaigns is presented.

TL;DR: In this article, the authors used the National Centers for Environmental Prediction (NCEP)/NCAR reanalysis data covering the last two decades to investigate how planetary wave driving of the stratosphere is connected to polar temperatures.

TL;DR: The NASA Goddard Space Flight Center (GSFC) two-dimensional (2-D) model of stratospheric transport and photochemistry has been used to predict ozone changes that have occurred in the past 20 years from anthropogenic chlorine and bromine emissions, solar cycle ultraviolet flux variations, the changing sulfate aerosol abundance due to several volcanic eruptions including the major eruptions of El Chichon and Mount Pinatubo, solar proton events (SPEs), and galactic cosmic rays (GCRs).

TL;DR: In this paper, a radiation model was used to compute daily net heating rates in the northern hemisphere (NH) and in the southern hemisphere (SH) for the Antarctic fall and winters of 1987 and 1992.