Anthropogenic aerosol forcing of the Atlantic meridional overturning circulation and the associated mechanisms in CMIP6 models

Hassan, Taufiq; Allen, Robert J.; Liu, Wei; Randles, Cynthia A.

doi:https://doi.org/10.5194/acp-21-5821-2021

Articles | Volume 21, issue 8

https://doi.org/10.5194/acp-21-5821-2021

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

https://doi.org/10.5194/acp-21-5821-2021

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

Articles | Volume 21, issue 8

Research article

|

19 Apr 2021

Research article |

| 19 Apr 2021

Anthropogenic aerosol forcing of the Atlantic meridional overturning circulation and the associated mechanisms in CMIP6 models

Taufiq Hassan, Robert J. Allen, Wei Liu, and Cynthia A. Randles

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Final revised paper (published on 19 Apr 2021)
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Preprint (discussion started on 02 Oct 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: 'Review of 'Anthropogenic aerosol forcing of the AMOC and the associated mechanisms in CMIP6 models'', Anonymous Referee #1, 28 Oct 2020
- AC1: 'Reply on RC1', Robert Allen, 18 Feb 2021
RC2: 'Review of of this manuscript cp-2019-168', Anonymous Referee #2, 07 Jan 2021
- AC2: 'Reply on RC2', Robert Allen, 18 Feb 2021

Peer-review completion

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

AR by Robert Allen on behalf of the Authors (20 Feb 2021) Author's response Author's tracked changes

ED: Publish as is (08 Mar 2021) by Ashu Dastoor

AR by Robert Allen on behalf of the Authors (08 Mar 2021) Manuscript

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Short summary

State-of-the-art climate models yield robust, externally forced changes in the Atlantic meridional overturning circulation (AMOC), the bulk of which are due to anthropogenic aerosol perturbations to net surface shortwave radiation and sea surface temperature. AMOC-related feedbacks act to reinforce this aerosol-forced response, largely due to changes in sea surface salinity (and hence sea surface density), with temperature- and cloud-related feedbacks acting to mute the initial response.