Effective radiative forcing and adjustments in CMIP6 models

Smith, Christopher J.; Kramer, Ryan J.; Myhre, Gunnar; Alterskjær, Kari; Collins, William; Sima, Adriana; Boucher, Olivier; Dufresne, Jean-Louis; Nabat, Pierre; Michou, Martine; Yukimoto, Seiji; Cole, Jason; Paynter, David; Shiogama, Hideo; O'Connor, Fiona M.; Robertson, Eddy; Wiltshire, Andy; Andrews, Timothy; Hannay, Cécile; Miller, Ron; Nazarenko, Larissa; Kirkevåg, Alf; Olivié, Dirk; Fiedler, Stephanie; Lewinschal, Anna; Mackallah, Chloe; Dix, Martin; Pincus, Robert; Forster, Piers M.

doi:https://doi.org/10.5194/acp-20-9591-2020

Articles | Volume 20, issue 16

https://doi.org/10.5194/acp-20-9591-2020

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

https://doi.org/10.5194/acp-20-9591-2020

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

Articles | Volume 20, issue 16

Research article

| Highlight paper

|

17 Aug 2020

Research article | Highlight paper |

| 17 Aug 2020

Effective radiative forcing and adjustments in CMIP6 models

Christopher J. Smith, Ryan J. Kramer, Gunnar Myhre, Kari Alterskjær, William Collins, Adriana Sima, Olivier Boucher, Jean-Louis Dufresne, Pierre Nabat, Martine Michou, Seiji Yukimoto, Jason Cole, David Paynter, Hideo Shiogama, Fiona M. O'Connor, Eddy Robertson, Andy Wiltshire, Timothy Andrews, Cécile Hannay, Ron Miller, Larissa Nazarenko, Alf Kirkevåg, Dirk Olivié, Stephanie Fiedler, Anna Lewinschal, Chloe Mackallah, Martin Dix, Robert Pincus, and Piers M. Forster

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Interactive discussion

Status: closed

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

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RC1: 'The assessment of ERF for CMIP6', Anonymous Referee #1, 21 Feb 2020
- AC1: 'Response to Reviewer #1', Christopher Smith, 20 May 2020
RC2: 'Comments on “Effective radiative forcing and adjustments in CMIP6 models” by Christopher J. Smith et al.', Anonymous Referee #2, 19 Mar 2020
- AC2: 'Response to Reviewer #2', Christopher Smith, 20 May 2020

Peer-review completion

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

AR by Christopher Smith on behalf of the Authors (21 May 2020)

ED: Publish as is (08 Jul 2020) by Hailong Wang

AR by Christopher Smith on behalf of the Authors (13 Jul 2020) Manuscript

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Short summary

The spread in effective radiative forcing for both CO₂ and aerosols is narrower in the latest CMIP6 (Coupled Model Intercomparison Project) generation than in CMIP5. For the case of CO₂ it is likely that model radiation parameterisations have improved. Tropospheric and stratospheric radiative adjustments to the forcing behave differently for different forcing agents, and there is still significant diversity in how clouds respond to forcings, particularly for total anthropogenic forcing.