Weakening of springtime Arctic ozone depletion with climate change ...

• Main Authors: Friedel, Marina, Chiodo, Gabriel, Sukhodolov, Timofei, Keeble, James, Peter, Thomas, Seeber, Svenja, Stenke, Andrea, Akiyoshi, Hideharu, Rozanov, Eugene, Plummer, David, Jöckel, Patrick, Zeng, Guang, Morgenstern, Olaf, Josse, Béatrice
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2023
• Subjects: Climate change
• Online Access: https://dx.doi.org/10.3929/ethz-b-000637193; http://hdl.handle.net/20.500.11850/637193

In the Arctic stratosphere, the combination of chemical ozone depletion by halogenated ozone-depleting substances (hODSs) and dynamic fluctuations can lead to severe ozone minima. These Arctic ozone minima are of great societal concern due to their health and climate impacts. Owing to the success of the Montreal Protocol, hODSs in the stratosphere are gradually declining, resulting in a recovery of the ozone layer. On the other hand, continued greenhouse gas (GHG) emissions cool the stratosphere, possibly enhancing the formation of polar stratospheric clouds (PSCs) and, thus, enabling more efficient chemical ozone destruction. Other processes, such as the acceleration of the Brewer–Dobson circulation, also affect stratospheric temperatures, further complicating the picture. Therefore, it is currently unclear whether major Arctic ozone minima will still occur at the end of the 21st century despite decreasing hODSs. We have examined this question for different emission pathways using simulations conducted ... : Atmospheric Chemistry and Physics, 23 (17) ...