Analysis of 24 years of mesopause region OH rotational temperature observations at Davis, Antarctica – Part 2: Evidence of a quasi-quadrennial oscillation (QQO) in the polar mesosphere

French, W. John R.; Klekociuk, Andrew R.; Mulligan, Frank J.

doi:https://doi.org/10.5194/acp-20-8691-2020

Articles | Volume 20, issue 14

https://doi.org/10.5194/acp-20-8691-2020

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

https://doi.org/10.5194/acp-20-8691-2020

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

Articles | Volume 20, issue 14

Research article

|

22 Jul 2020

Research article |

| 22 Jul 2020

Analysis of 24 years of mesopause region OH rotational temperature observations at Davis, Antarctica – Part 2: Evidence of a quasi-quadrennial oscillation (QQO) in the polar mesosphere

W. John R. French, Andrew R. Klekociuk, and Frank J. Mulligan

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Final revised paper (published on 22 Jul 2020)
Supplement to the final revised paper
Preprint (discussion started on 05 Feb 2020)
Supplement to the preprint

Interactive discussion

Status: closed

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

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RC1: 'acp-2019-1097', Anonymous Referee #1, 18 Feb 2020
- AC1: 'Response to RC1', John French, 14 May 2020
RC2: 'Review of "Analysis of 24 years of mesopause region OH rotational temperature 1 observations at Davis, Antarctica. Part 2: Evidence of a quasi-2 quadrennial oscillation (QQO) in the polar mesosphere" by French et al.', Anonymous Referee #2, 03 Mar 2020
- AC2: 'Response to RC2', John French, 14 May 2020

Peer-review completion

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

AR by John French on behalf of the Authors (15 May 2020) Author's response

ED: Referee Nomination & Report Request started (26 May 2020) by Franz-Josef Lübken

ED: Publish as is (10 Jun 2020) by Franz-Josef Lübken

AR by John French on behalf of the Authors (11 Jun 2020) Author's response Manuscript

Short summary

We explore a quasi-quadrennial oscillation (QQO; 3–4 K amplitude, ~ 4-year period) in mesopause region temperatures observed in 24 years of hydroxyl airglow measurements over Davis, Antarctica (68° S, 78° E). Correlation and composite analysis using meteorological reanalysis and satellite data reveals complex patterns on the QQO timescale in both hemispheres. Modulation of the meridional circulation, linked to the propagation of gravity waves, plays a significant role in producing the QQO response.