Changes in clouds and thermodynamics under solar geoengineering and implications for required solar reduction

Russotto, Rick D.; Ackerman, Thomas P.

doi:https://doi.org/10.5194/acp-18-11905-2018

Articles | Volume 18, issue 16

https://doi.org/10.5194/acp-18-11905-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The Geoengineering Model Intercomparison Project (GeoMIP):...

https://doi.org/10.5194/acp-18-11905-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 16

Research article

|

21 Aug 2018

Research article |

| 21 Aug 2018

Changes in clouds and thermodynamics under solar geoengineering and implications for required solar reduction

Rick D. Russotto and Thomas P. Ackerman

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Final revised paper (published on 21 Aug 2018)
Supplement to the final revised paper
Preprint (discussion started on 16 Apr 2018)
Supplement to the preprint

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Anonymous Review', Anonymous Referee #1, 25 May 2018
RC2: 'Review of Russotto and Ackerman', Anonymous Referee #2, 01 Jun 2018
RC3: 'Review of "Changes in clouds and thermodynamics under solar geoengineering and implications for required solar reduction” by Rick D. Russotto and Thomas P. Ackerman', Anonymous Referee #3, 07 Jun 2018
AC1: 'Responses to reviewer comments and changes to manuscript', Rick Russotto, 24 Jul 2018

Peer-review completion

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

AR by Rick Russotto on behalf of the Authors (24 Jul 2018) Author's response Manuscript

ED: Publish subject to minor revisions (review by editor) (26 Jul 2018) by Ben Kravitz

AR by Rick Russotto on behalf of the Authors (27 Jul 2018) Author's response Manuscript

ED: Publish as is (30 Jul 2018) by Ben Kravitz

AR by Rick Russotto on behalf of the Authors (06 Aug 2018) Author's response Manuscript

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Short summary

In simulations with different climate models in which the strength of the Sun is reduced to cancel the surface warming from a quadrupling of atmospheric carbon dioxide, low cloud cover decreases, high cloud cover increases, the upper troposphere and stratosphere cool, and water vapor concentration decreases. The stratospheric cooling and low cloud reduction result in more sunlight reduction being needed than originally thought.