The influence of the Arctic amplification on the stratospheric polar vortex: A model study allowing for ozone feedbacks ...

• Main Authors: Schmidt, Franziska, Spiegl, Tobias, Langematz, Ulrike
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Arctic
• Online Access: https://dx.doi.org/10.57757/iugg23-2452; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018300

<!--!introduction!--> The greenhouse gas-induced warming in the Arctic is more pronounced than in other parts of the Earth. This Arctic amplification (AA) has large impacts on the local climate and ecosystem. In addition, the temperature gradient between the polar region and the tropical latitudes drives the large-scale atmospheric circulation. It is widely debated if the AA significantly impacts this circulation by modifying the jetstream or the planetary wave generation, for example. One possible pathway involves the troposhere-stratosphere coupling through an enhanced planetary wave propagation. A wide range of observational studies of the last decades support the idea of an Arctic influence on midlatitude weather. On the other hand, signals in climate models are either absent or small compared to the natural variability. The focus of this study is on the stratospheric pathway of the proposed relation. To ensure realistic stratospheric processes, we use the climate-chemistry model EMAC (ECHAM/MESSy ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...