International Ozone Commission

Due to the Covid-19 crisis, the Quadrennial Ozone Symposium QOS2020 has been postponed to 3 - 9 October 2021. It will be entirely online.

Press Release: The International Ozone Commission, on the 33th anniversary of the Montreal Protocol, reports successes and remaining challenges for understanding ozone layer recovery

September 16th is the International Day for the Preservation of the Ozone Layer, celebrating the 1987 anniversary of the Montreal Protocol on Substances that Deplete the Ozone Layer. The Montreal Protocol is the globally ratified treaty that controls the production and consumption of ozone depleting substances (ODSs) and many replacements for these substances.

Quadrennial Ozone Symposium QOS2020: Abstracts submission is open

Press Release: The International Ozone Commission, on the 32th anniversary of the Montreal Protocol, reports success in healing of the ozone layer

September 16th is International Day for the Preservation of the Ozone Layer, celebrating the 1987 anniversary of the Montreal Protocol on Substances that Deplete the Ozone Layer. This protocol is the first environmental treaty to achieve universal ratification. The Montreal Protocol’s Kigali amendment, ratified on 1 January 2019, aims at mitigating the future impact on the Earth’s climate of hydrofluorocarbons or HFCs, which are substitutes for ozone depleting substances (ODSs) and powerful greenhouse gases.

IO3C/IAMAS/IUGG Resolution on the Role of Ozone and Ozone Depleting Substances for the Environment

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Ozone hole could've been a big one this year – but it wasn’t

The view of total ozone over the Antarctic pole from October 24, 2018. The purple and blue colors are where there is the least ozone, and the yellows and reds are where there is more ozone.

Ozone Hole Modest Despite Optimum Conditions for Ozone Depletion

Press Release: The International Ozone Commission, on the 31th anniversary of the Montreal Protocol, reports signs of healing of the ozone layer

September 16th is International Day for the Preservation of the Ozone Layer, commemorating the 1987 anniversary of the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer. Hailed as an example of exceptional international cooperation for the protection of the ozone layer, the Montreal Protocol became the first international treaty to achieve universal ratification. The Montreal Protocol expanded in October 2016 with the addition of the Kigali amendment.

2016: 31th Anniversary of the Vienna Convention

The International Ozone Commission, on the 31st anniversary of the Vienna Convention for the protection of the Ozone Layer, reports that despite signs of healing, the ozone layer continues to be affected by large ozone depletion in Antarctica. Please see the Press Release.