Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 5
Articles | Volume 26, issue 5
https://doi.org/10.5194/acp-26-3743-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-3743-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 5
Research article
 | 
17 Mar 2026
Research article |  | 17 Mar 2026

Tropical stratospheric upwelling as seen in observations of the tape recorder signal

Meghan Brehon, Susann Tegtmeier, Adam Bourassa, Sean M. Davis, Udo Grabowski, Tobias Kerzenmacher, and Gabriele Stiller

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Short summary
We used observations of water vapour to estimate vertical transport rates in the tropical stratosphere for 1995-2020 and analyze stratospheric variability. Our results find good agreement between our observation-based estimates and reanalysis upwelling and reveal that the variability is mainly driven by the Quasi-Biennial Oscillation (QBO) and El Niño Southern Oscillation (ENSO) with a clear signal in the upwelling time series coinciding with the recent QBO disruptions of 2015/16 and 2019/20.
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