Interactions between the stratospheric polar vortex and Atlantic circulation on seasonal to multi-decadal timescales

Dimdore-Miles, Oscar; Gray, Lesley; Osprey, Scott; Robson, Jon; Sutton, Rowan; Sinha, Bablu

doi:https://doi.org/10.5194/acp-22-4867-2022

Articles | Volume 22, issue 7

https://doi.org/10.5194/acp-22-4867-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-4867-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 7

Research article

| Highlight paper

|

12 Apr 2022

Research article | Highlight paper |

| 12 Apr 2022

Interactions between the stratospheric polar vortex and Atlantic circulation on seasonal to multi-decadal timescales

Oscar Dimdore-Miles, Lesley Gray, Scott Osprey, Jon Robson, Rowan Sutton, and Bablu Sinha

Data sets

Climate reanalysis Copernicus Climate Change Service Climate Data Store https://climate.copernicus.eu/climate-reanalysis

MOHC UKESM1.0-LL model output prepared for CMIP6 CMIP piControl Y. Tang, S. Rumbold, R. Ellis, D. Kelley, J. Mulcahy, A. Sellar, J. Walton, and C. Jones https://doi.org/10.22033/ESGF/CMIP6.6298

Model code and software

oscardm20994/Wavelet_analysis: Wavlet_analysis O. Dimdore-Miles https://doi.org/10.5281/zenodo.4529635

Short summary

This study examines interactions between variations in the strength of polar stratospheric winds and circulation in the North Atlantic in a climate model simulation. It finds that the Atlantic Meridional Overturning Circulation (AMOC) responds with oscillations to sets of consecutive Northern Hemisphere winters, which show all strong or all weak polar vortex conditions. The study also shows that a set of strong vortex winters in the 1990s contributed to the recent slowdown in the observed AMOC.