Structural changes in the shallow and transition branch of the Brewer–Dobson circulation induced by El Niño

Diallo, Mohamadou; Konopka, Paul; Santee, Michelle L.; Müller, Rolf; Tao, Mengchu; Walker, Kaley A.; Legras, Bernard; Riese, Martin; Ern, Manfred; Ploeger, Felix

doi:https://doi.org/10.5194/acp-19-425-2019

Articles | Volume 19, issue 1

https://doi.org/10.5194/acp-19-425-2019

© Author(s) 2019. 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-19-425-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 1

Research article

| Highlight paper

|

11 Jan 2019

Research article | Highlight paper |

| 11 Jan 2019

Structural changes in the shallow and transition branch of the Brewer–Dobson circulation induced by El Niño

Mohamadou Diallo, Paul Konopka, Michelle L. Santee, Rolf Müller, Mengchu Tao, Kaley A. Walker, Bernard Legras, Martin Riese, Manfred Ern, and Felix Ploeger

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Final revised paper (published on 11 Jan 2019)
Preprint (discussion started on 06 Aug 2018)

Interactive discussion

Status: closed

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

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RC1: 'Review Comments', Anonymous Referee #2, 05 Sep 2018
- AC1: 'Answer to Reviewer 1 Comments for “Structural changes in the shallow and transition branch of the Brewer-Dobson circulation induced by El Nino” by Mohamadou Diallo et al.', Mohamadou Diallo, 20 Nov 2018
- AC3: ''Answer to Reviewer 2 Comments', Mohamadou Diallo, 20 Nov 2018
RC2: 'Review', Anonymous Referee #1, 12 Sep 2018
- AC2: 'Answer to Reviewer #2 Comments for “Structural changes in the shallow and transition branch of the Brewer-Dobson circulation induced by El Niño” by Mohamadou Diallo et al.', Mohamadou Diallo, 20 Nov 2018
- AC4: ''Answer to Reviewer 1 Comments', Mohamadou Diallo, 20 Nov 2018

Peer-review completion

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

AR by Mohamadou Diallo on behalf of the Authors (20 Nov 2018) Author's response Manuscript

ED: Publish as is (19 Dec 2018) by Gabriele Stiller

AR by Mohamadou Diallo on behalf of the Authors (20 Dec 2018) Manuscript

Short summary

This paper assesses the structural changes in the shallow and transition branches of the BDC induced by El Nino using the Lagrangian model simulations driven by ERAi and JRA-55 combined with MLS observations. We found a clear evidence of a weakening of the transition branch due to an upward shift in the dissipation height of the planetary and gravity waves and a strengthening of the shallow branch due to enhanced GW breaking in the tropics–subtropics and PW breaking at high latitudes.