2019
Dunse, B. L., N. Derek, P. J. Fraser, P. B. Krummel and L. P. Steele, Australian and Global Emissions of Ozone Depleting Substances, Report prepared for the Australian Government Department of the Environment and Energy, CSIRO Oceans and Atmosphere, Climate Science Centre, Aspendale, Australia, iv, 37 pp., 2019
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About this report
This report has been prepared by the Commonwealth Scientific and Industrial Research Organisation for the Department as a means to provide information on global and domestic emissions of ozone depleting substances controlled by the Montreal Protocol on Substances that Deplete the Ozone Layer.
The report summarises atmospheric measurements of ozone depleting substances arriving at the Cape Grim facility in Tasmania for the period 1980 to 2018 from the southern hemisphere and from Melbourne. It uses those measurements and established modelling systems to estimate emissions of the measured ozone depleting substances both globally and from Australia.
These measurements and emission estimations are an important resource for the global scientific community to draw upon when measuring progress by the Montreal Protocol in controlling and reducing emissions of ozone depleting substances.
The report finds that most of the ozone depleting substances have declined in concentration in the atmosphere (such as chlorofluorocarbons, methyl chloroform, chloroform, halons, methyl bromide) but that some substances (hydro-chlorofluorocarbons, methyl chloride, and others) have increased concentrations. Overall, total chlorine increased in the atmosphere, while total bromide decreased. Australian emissions of all ozone depleting substances continue to decrease.