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The 2013 ozone hole was relatively small, with about 15-17 ozone holes out of the last 20 (1994-2013) having been bigger/deeper (depending on the metric used), and only 2-4 having been smaller (2002, 2004, 2010, 2012).
Bromine explosion events that occur over first year sea ice in the polar spring cause mercury deposition and dramatically alter the oxidative capacity of the polar boundary layer. Atmospheric chemical measurements made during the Sea Ice Physics and Ecosystems eXperiment (SIPEX II)…
Considerable progress in our understanding of the causes of polar stratospheric ozone loss has been made during the past two decades. However, model calculations are still limited by uncertainties in both chemical and dynamical factors.
The composition of the stratosphere is driven by transport, temperatures and processes in the tropical tropopause layer – this has implications for ozone, radiation, and surface climate. The properties of the tropical tropopause layer have changed in recent decades, e.g.
The ozone hole over Antarctica is formed inside polar stratospheric vortex, which is under influence of large-scale planetary waves. The Quasi-stationary wave (QSW) in the spring Southern Hemisphere (SH)…
Results from the chemistry—atmosphere—climate model version of the Australian Community Climate and Earth System Simulator (ACCESS) are presented. ACCESS is based on the UK Met Office Unified Model version 7.3 (UM 7.3) including the United Kingdom Chemistry and Aerosols (UKCA) module.
The cause of seasonal trends in the zonal asymmetry of the total ozone column (TOC) at high southern latitudes are examined. Using ERA-Interim assimilated meteorological data, we examine characteristics of extra-tropical Rossby waves…
Links between changes in the southern polar stratosphere and tropospheric climate have been identified in both modelling and observational studies, highlighting the importance of an accurate stratosphere in climate models. However…
The upper troposphere and lower stratosphere (UTLS) is a highly coupled region of the atmosphere where radiation, dynamics, clouds and chemical processes interact on a wide variety of spatial and temporal scales. We use a suite of instruments at Davis, Antarctica (69S, 78E)…
We use a set of metrics for the polar atmosphere to compare coupled ocean-atmosphere general circulation models (AOGCMs) experiments for the 5th Coupled Model Intercomparison Project (CMIP5) with results from chemistryclimate models (CCMs) of the 2nd Chemistry-Climate Model Validation (CCMVal-2)…
The ozone loss simulated with climate models is based on laboratory kinetic data. These laboratory data are difficult to conduct at stratospheric pressures and temperatures and there is substantial uncertainty surrounding these parameters.