Two very different winters are shown to illustrate the huge range of variability on the NH. The examples are taken from a UM integration using a comprehensive, ASAD based chemistry:
Southern Hemisphere:
The unprecedented Antarctic ozone hole of 2002 raises a number of important questions regarding the structure and inter-annual variability of the southern hemisphere stratosphere. The figure is summarising the inter-annual variability on the SH as modelled by the UM in terms of vortex strength and high latitude total ozone and compares it to observation:
