On the climate sensitivity and historical warming evolution in recent coupled model ensembles

Flynn, Clare Marie; Mauritsen, Thorsten

doi:https://doi.org/10.5194/acp-20-7829-2020

Articles | Volume 20, issue 13

https://doi.org/10.5194/acp-20-7829-2020

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

https://doi.org/10.5194/acp-20-7829-2020

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

Articles | Volume 20, issue 13

Research article

|

06 Jul 2020

Research article |

| 06 Jul 2020

On the climate sensitivity and historical warming evolution in recent coupled model ensembles

Clare Marie Flynn and Thorsten Mauritsen

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Final revised paper (published on 06 Jul 2020)
Preprint (discussion started on 24 Jan 2020)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'nicely written paper, but less ambitious than it could be', Anonymous Referee #1, 17 Feb 2020
RC2: 'Review for Flynn \& Mauritsen', Anonymous Referee #2, 21 Feb 2020
RC3: 'Review', Anonymous Referee #3, 21 Feb 2020
AC1: 'Reply to All Reviewers', Clare Flynn, 16 May 2020

Peer-review completion

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

AR by Clare Flynn on behalf of the Authors (27 May 2020) Author's response Manuscript

ED: Publish as is (06 Jun 2020) by Hailong Wang

AR by Clare Flynn on behalf of the Authors (09 Jun 2020)

Short summary

The range of climate sensitivity of models participating in CMIP6 has increased relative to models participating in CMIP5 due to decreases in the total feedback parameter. This is caused by increases in the shortwave all-sky and clear-sky feedbacks, particularly over the Southern Ocean. These shifts between CMIP6 and CMIP5 did not arise by chance. Both CMIP5 and CMIP6 models are found to exhibit aerosol forcing that is too strong, causing too much cooling relative to observations.