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16 September 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.

5-9 September 2016 - Quadrenial Ozone Symposium 2016

The Quadrennial Ozone symposium held in Edinburgh, Scotland. More than 300 scientists from all over the world gathered to discuss ozone research and the current status of atmospheric ozone, including preliminary results from this year’s ozone hole. Please see the conference programme book or the conference web site for further information.

22 July 2016 - Reducing Hydrofluorocarbons via the Montreal Protocol is the most significant climate action the world can take this year

At a meeting of the Climate and Clean Air Coalition in Vienna, ministers and high-level representatives of 25 countries backed the adoption of an ambitious amendment to the Montreal Protocol to phase-down the use of hydrofluorocarbons (HFCs), which are powerful greenhouse gases. Read further details.

14 January 2016 - IO3C Supports Continued Stratospheric Ozone Monitoring at Lerwick, Reading and Manchester Sites

In a letter to the UK's Department for Environment, Food and Rural Affairs, the IO3C supports the continued operation of statospheric ozone monitoring at the Lerwick, Reading and Manchester sites. These long-term monitoring activities are critical for supporting international agreements such as the Montreal Protocol, and such data are becoming increasingly important for climate change studies. The IO3C therefore supports the full continuation of the program given the UK’s unique geographical location in relation to global weather patterns and the high importance of mid and high latitude observations. The full text of the letter is available here.


15 September 2015 - 30th Anniversary of the Vienna Convention

The IO3C has issued a letter (IO3C Press Release - 2015) to the community relating to Ozone Day 2015 noting the 30th Anniversary of the Vienna Convention under which the Montreal Protocol was negotiated. It also warns that large ozone depletion continues to occur in Antarctica.


9 December 2014 - 2016 Quadrennial Ozone Symposium in Edinburgh Scotland on Sept 4-9

The next Quadrennial Ozone Symposium is planned for September 4-9, 2016, in Edinburgh, Scotland. The website for the QOS is

The draft plan is here: Extended_Proposal_Edinburgh_2016_Final_Draft_30_09_2014

15 September 2014 - 27th Anniversary of the Montreal Protocol

The IO3C has issued a letter (IO3C Press Release - 2014) to the community relating to Ozone Day 2014 and the release of the WMO-UNEP Assessment for Decision-Makers based on the complete ozone assessment that will come out later this year.


20 September 2013 - 26th Anniversary of the Montreal Protocol

The IO3C has issued a letter to the community relating to Ozone Day 2013

5 March 2013 - Statement on Geo-engineering released

The IO3C has issued a statement concerning Geo-engineering (solar radiation management by the injection of aerosols into the stratosphere) for the reduction of climate change.

For older news items, please see archived news.