Impacts of Arctic ozone on the stratospheric spring onset and its surface effects in present and future climate ...

• Main Authors: Friedel, Marina, Chiodo, Gabriel, Stenke, Andrea, Domeisen, Daniela, Peter, Thomas
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Arctic
• Online Access: https://dx.doi.org/10.57757/iugg23-2945; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018923

<!--!introduction!--> In the Arctic, the stratospheric polar vortex usually breaks up between March and May in an event known as Final Stratospheric Warming (FSW). The polar vortex breakdown can induce anomalies at the surface, which depend to a large part on the timing of the FSW. Here, we investigate the importance of Arctic stratospheric ozone for the timing and surface impacts of FSWs under present-day and future conditions. In detail, we investigate the relationship between springtime ozone and the FSW in two Chemistry Climate Models using setups with fully interactive and prescribed climatological ozone for present-day and future conditions. For years with low springtime ozone concentrations in present-day conditions, we find that the FSW at 50 hPa is significantly delayed by 10-14 days and does not show robust effects on surface climate. In contrast, in years with high ozone concentrations, the FSW happens 9-16 days earlier than average and is followed by a negative Arctic Oscillation (AO) at ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...