Articles | Volume 20, issue 8
https://doi.org/10.5194/acp-20-5111-2020
https://doi.org/10.5194/acp-20-5111-2020
Research article
 | 
30 Apr 2020
Research article |  | 30 Apr 2020

A tropospheric pathway of the stratospheric quasi-biennial oscillation (QBO) impact on the boreal winter polar vortex

Koji Yamazaki, Tetsu Nakamura, Jinro Ukita, and Kazuhira Hoshi

Data sets

Description of a Complete (Interpolated) Outgoing Longwave Radiation Dataset (https://www.esrl.noaa.gov/psd/data/gridded/data.interp_OLR.html) B. Liebmann and C. A. Smith https://www.jstor.org/stable/26233278

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Short summary
It has been well known that the stratospheric quasi-biennial oscillation (QBO) affects the winter Arctic polar vortex. This relation has been explained through stratospheric processes. We show that a tropospheric process also plays a role, especially in early winter, based on data analysis and numerical simulations. The QBO modifies tropical convection, which affects planetary waves in the midlatitude troposphere, then modulating vertical propagation and the polar vortex.
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