Articles | Volume 2, issue 1
Weather Clim. Dynam., 2, 205–231, 2021
https://doi.org/10.5194/wcd-2-205-2021
Weather Clim. Dynam., 2, 205–231, 2021
https://doi.org/10.5194/wcd-2-205-2021

Research article 15 Mar 2021

Research article | 15 Mar 2021

Origins of multi-decadal variability in sudden stratospheric warmings

Oscar Dimdore-Miles et al.

Data sets

The ERA-Interim reanalysis dataset European Centre for Medium-range Weather Forecast https://www.ecmwf.int/en/forecasts/datasets/archive-datasets/reanalysis-datasets/era-interim

Model code and software

Wavelet Analysis Python Scripts Oscar Dimdore-Miles https://doi.org/10.5281/zenodo.4529635

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Short summary
Observations of the stratosphere span roughly half a century, preventing analysis of multi-decadal variability in circulation using these data. Instead, we rely on long simulations of climate models. Here, we use a model to examine variations in northern polar stratospheric winds and find they vary with a period of around 90 years. We show that this is possibly due to variations in the size of winds over the Equator. This result may improve understanding of Equator–polar stratospheric coupling.