The advective Brewer–Dobson circulation in the ERA5 reanalysis: climatology, variability, and trends

Diallo, Mohamadou; Ern, Manfred; Ploeger, Felix

doi:https://doi.org/10.5194/acp-21-7515-2021

Articles | Volume 21, issue 10

https://doi.org/10.5194/acp-21-7515-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The SPARC Reanalysis Intercomparison Project (S-RIP) (ACP/ESSD...

https://doi.org/10.5194/acp-21-7515-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 10

Research article

|

18 May 2021

Research article |

| 18 May 2021

The advective Brewer–Dobson circulation in the ERA5 reanalysis: climatology, variability, and trends

Mohamadou Diallo, Manfred Ern, and Felix Ploeger

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Final revised paper (published on 18 May 2021)
Preprint (discussion started on 28 Sep 2020)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Review on acp-2020-881, Diallo et al. 2020 ACPD', Roland Eichinger, 22 Oct 2020
- AC1: 'Reply on RC1', Mohamadou Diallo, 08 Feb 2021
RC2: 'Review of Diallo et al', Anonymous Referee #2, 04 Dec 2020
- AC2: 'Reply on RC2', Mohamadou Diallo, 08 Feb 2021

Peer-review completion

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

AR by Mohamadou Diallo on behalf of the Authors (08 Feb 2021) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (16 Feb 2021) by Peter Haynes

RR by Anonymous Referee #2 (26 Feb 2021)

RR by Roland Eichinger (08 Mar 2021)

ED: Publish subject to minor revisions (review by editor) (15 Mar 2021) by Peter Haynes

AR by Mohamadou Diallo on behalf of the Authors (25 Mar 2021) Author's response Author's tracked changes Manuscript

ED: Publish as is (14 Apr 2021) by Peter Haynes

AR by Mohamadou Diallo on behalf of the Authors (15 Apr 2021) Manuscript

Short summary

Despite good agreement in the spatial structure, there are substantial differences in the strength of the Brewer–Dobson circulation (BDC) and its modulations in the UTLS and upper stratosphere. The tropical upwelling is generally weaker in ERA5 than in ERAI due to weaker planetary and gravity wave breaking in the UTLS. Analysis of the BDC trend shows an acceleration of the BDC of about 1.5 % decade^-1 due to the long-term intensification in wave breaking, consistent with climate predictions.