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

• Main Authors: Friedel, Marina, Chiodo, Gabriel, Peter, Thomas
• Format: Text
• Language: English
• Published: ETH Zurich 2023
• Subjects: Arctic; Climate change
• Online Access: https://dx.doi.org/10.3929/ethz-b-000651804; http://hdl.handle.net/20.500.11850/651804

Arctic ozone is subject to large interannual variability, and severe ozone minima can occur through chemical ozone depletion and dynamical variability. Such Arctic ozone minima have been shown to bear a great societal relevance due to their impacts on health and climate. Following the success of the Montreal Protocol, ozone depleting substances (ODSs) in the stratosphere are declining, implying an expected weakening of chemical ozone destruction. However, continuing greenhouse gas (GHG) emissions cool the stratosphere, which might lead to an enhanced formation of polar stratospheric clouds (PSCs) and thus more efficient chemical depletion of ozone. Due to these opposing processes, there is currently no consensus on the fate of Arctic ozone minima in future climate. Here, we investigate the future evolution of Arctic ozone minima over the 21st century under different emission pathways in simulations conducted for the Chemistry-Climate Model Initiative (CCMI), CCMI-1 and CCMI-2022, and constrain these ... : EGUsphere ...