Articles | Volume 4, issue 4
https://doi.org/10.5194/wcd-4-1071-2023
https://doi.org/10.5194/wcd-4-1071-2023
Research article
 | 
06 Dec 2023
Research article |  | 06 Dec 2023

How do different pathways connect the stratospheric polar vortex to its tropospheric precursors?

Raphael Harry Köhler, Ralf Jaiser, and Dörthe Handorf

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Short summary
This study explores the local mechanisms of troposphere–stratosphere coupling on seasonal timescales during extended winter in the Northern Hemisphere. The detected tropospheric precursor regions exhibit very distinct mechanisms of coupling to the stratosphere, thus highlighting the importance of the time- and zonally resolved picture. Moreover, this study demonstrates that the ICOsahedral Non-hydrostatic atmosphere model (ICON) can realistically reproduce troposphere–stratosphere coupling.