Recovery of the tropical lower stratospheric ozone layer

Climate impact of stratospheric ozone recovery

Ensemble simulations of the decline and recovery of stratospheric ozone

[1] An ensemble of simulations of a coupled chemistry-climate model is completed for 1960–2100. The simulations are divided into two periods, 1960–2005 and 1990–2100. The modeled total ozone amount decrease throughout the atmosphere from the 1960s until about 2000–2005, depending on latitude. The Antarctic ozone hole develops rapidly in the model from about the late 1970s, in agreement with obs...

The Impact of Stratospheric Ozone Recovery on Tropopause Height Trends

The evolution of the tropopause in the past, present, and future climate is examined by analyzing a set of long-term integrations with stratosphere-resolving chemistry climate models (CCMs). These CCMs have high vertical resolution near the tropopause, a model top located in the mesosphere or above, and, most important, fully interactive stratospheric chemistry. Using such CCM integrations, it ...

On the seasonal dependence of tropical lower-stratospheric temperature trends

This study examines the seasonality of tropical lower-stratospheric temperature trends using the Microwave Sounding Unit lower-stratospheric channel (T4) for 1980– 2008. We present evidence that this seasonality is largely a response to changes in the Brewer-Dobson circulation (BDC) driven by extratropical wave forcing. We show how the tropical T4 trend can be used as an indicator of changes in...

Global distribution of total ozone and lower stratospheric temperature variations

This study gives an overview of interannual variations of total ozone and 50 hPa temperature. It is based on newer and longer records from the 1979 to 2001 Total Ozone Monitoring Spectrometer (TOMS) and Solar Backscatter Ultraviolet (SBUV) instruments, and on US National Center for Environmental Prediction (NCEP) reanalyses. Multiple linear least squares regression is used to attribute variatio...