The Quadrennial Ozone Symposium (QOS) held on line on October 3-9, 2021 was a great success with 341 registered participants from various countries around the world.

It was the first online meeting of QOS history. Up to 230 participants connected to the various sessions of the Symposium. There were still about 140 connections during the last session on Saturday 9 October.

During the opening session on Sunday, October 3rd, 2021, the Dobson and Farman awards were given to Dr. William Ball and the SBUV-MOD team of NASA, as previously announced.

Press Release: The International Ozone Commission, on the 34th 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. 

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.

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.

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.