Coupling of Arctic ozone and stratospheric dynamics and its influence on surface climate : the role of CFC concentrations ...

• Main Authors: Friedel, Marina, Chiodo, Gabriel, Muthers, Stefan, Anet, Julien, Stenke, Andrea, Peter, Thomas
• Format: Text
• Language: English
• Published: European Geosciences Union 2020
• Subjects: 551 Geologie und Hydrologie; Arctic
• Online Access: https://dx.doi.org/10.21256/zhaw-20215; https://digitalcollection.zhaw.ch/handle/11475/20215

Arctic stratospheric ozone has been shown to exert a statistically significant influence on Northern Hemispheric surface climate. This suggests that Arctic ozone is not only passively responding to dynamical variability in the stratosphere, but actively feeds back into the circulation through chemical and radiative processes. However, the extent and causality of the chemistry-dynamics coupling is still unknown. Since many state-of-the-art climate models lack a sufficient representation of ozone-dynamic feedbacks, a quantification of this coupling can be used to improve intra-seasonal weather and long-term climate forecasts. We assess the importance of the ozone-dynamics coupling by performing simulations with and without interactive chemistry in two Chemistry Climate Models. The chemistry-dynamics coupling was examined in two different sets of time-slice simulations: one using pre-industrial, and one using year-2000 boundary conditions. We focus on the impact of sudden stratospheric warmings (SSW) and strong ...