Summary

The 2012 ozone hole was one of the smallest since the late 1980fs due to a warmer than normal mid]lower stratosphere over the Antarctic region this year. The development and recovery of the 2012 ozone hole will be shown via a set of metrics based on the Ozone Monitoring Instrument (OMI) on board the Earth Observing Satellite (EOS) Aura. Other observational results will be shown to complement these satellite data. The 2012 ozone hole metrics will be compared to the historical metrics, and these will be linearly regressed against Equivalent Effective Stratospheric Chlorine (EESC) data. The EESC data are based entirely on Cape Grim Air Archive, Antarctic firn and AGAGE global measurements of ozone depleting substances, and are calculated using the new formulation outlined in Newman et al. (2006) and Newman et al. (2007). A brief overview of the EESC calculation method and the trace gas observational data used in the calculation will be given.

Authors:Krummel P.B. Fraser P.J. Klekociuk A.R. Tully M.B. Steele L.P. Trudinger C.M. Etheridge D.M. Derek N. O'Doherty S. Simmonds P.G. Miller B.R. Mühle J. Weiss R.F. Oram D.E. Prinn R.G. Wang H.J. Published in: 2012 Category 3: Verbal presentation Program area: Ice, Ocean, Atmosphere and Climate
Read publication at cawcr.gov.au
Krummel P.B., Fraser P.J., Klekociuk A.R., Tully M.B., Steele L.P., Trudinger C.M., Etheridge D.M., Derek N., O'Doherty S., Simmonds P.G., Miller B.R., Mühle J., Weiss R.F., Oram D.E., Prinn R.G., Wang H.J. (2012) The 2012 Ozone Hole and updated Equivalent Effective Stratospheric Chlorine data, Atmospheric Composition Observations and Modelling Conference incorporating the Cape Grim Annual Science Meeting 2012, South Durras, NSW, Australia, 28-30 November 2012 .; http://www.cawcr.gov.au/events/annual_workshop_2011/;

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