On the forcings of the unusual Quasi-Biennial Oscillation structure in February 2016

Li, Haiyan; Pilch Kedzierski, Robin; Matthes, Katja

doi:https://doi.org/10.5194/acp-20-6541-2020

Articles | Volume 20, issue 11

https://doi.org/10.5194/acp-20-6541-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-20-6541-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 11

Research article

|

05 Jun 2020

Research article |

| 05 Jun 2020

On the forcings of the unusual Quasi-Biennial Oscillation structure in February 2016

Haiyan Li, Robin Pilch Kedzierski, and Katja Matthes

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Final revised paper (published on 05 Jun 2020)
Supplement to the final revised paper
Preprint (discussion started on 02 Sep 2019)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Review of Li et al. (2019)', Anonymous Referee #1, 27 Sep 2019
- AC1: 'Author response', Haiyan Li, 31 Jan 2020
RC2: 'Review of Li et al', Anonymous Referee #2, 28 Sep 2019
- AC1: 'Author response', Haiyan Li, 31 Jan 2020
RC3: 'reviewer comment', Anonymous Referee #3, 08 Oct 2019
- AC1: 'Author response', Haiyan Li, 31 Jan 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Haiyan Li on behalf of the Authors (31 Jan 2020) Author's response Manuscript

ED: Referee Nomination & Report Request started (01 Apr 2020) by Timothy J. Dunkerton

RR by Anonymous Referee #2 (01 Apr 2020)

RR by Anonymous Referee #3 (10 Apr 2020)

RR by Anonymous Referee #1 (13 Apr 2020)

ED: Publish as is (27 Apr 2020) by Timothy J. Dunkerton

AR by Haiyan Li on behalf of the Authors (06 May 2020) Author's response Manuscript

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Short summary

The QBO westerly phase was reversed by an unexpected easterly jet near 40 hPa and the westerly zonal wind lasted an unusually long time at 20 hPa during winter 2015/16. We find that quasi-stationary Rossby wave W1 and faster Rossby wave W2 propagating from the northern extratropics and a locally generated Rossby wave W3 were important contributors to the easterly jet at 40 hPa. Our results suggest that the unusual zonal wind structure at 20 hPa could be caused by enhanced Kelvin wave activity.