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

Köhler, Raphael Harry; Jaiser, Ralf; Handorf, Dörthe

doi:https://doi.org/10.5194/wcd-4-1071-2023

Articles | Volume 4, issue 4

https://doi.org/10.5194/wcd-4-1071-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/wcd-4-1071-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 4, issue 4

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

Data sets

ERA5 hourly data on single levels from 1940 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and J.-N. Thépaut https://doi.org/10.24381/cds.adbb2d47

Seasonal climatology with the atmosphere model ICON-NWP R. Köhler https://hdl.handle.net/21.14106/c815f7268f7156a7d7cd59099f6413db2f263943

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.