Articles | Volume 20, issue 11
Atmos. Chem. Phys., 20, 6607–6630, 2020
https://doi.org/10.5194/acp-20-6607-2020
Atmos. Chem. Phys., 20, 6607–6630, 2020
https://doi.org/10.5194/acp-20-6607-2020

Research article 05 Jun 2020

Research article | 05 Jun 2020

Evaluation of Southern Ocean cloud in the HadGEM3 general circulation model and MERRA-2 reanalysis using ship-based observations

Peter Kuma et al.

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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Peter Kuma on behalf of the Authors (09 Oct 2019)  Author's response    Manuscript
ED: Reconsider after major revisions (24 Oct 2019) by Patrick Chuang
AR by Peter Kuma on behalf of the Authors (01 Nov 2019)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (28 Jan 2020) by Patrick Chuang
RR by Anonymous Referee #1 (02 Mar 2020)
ED: Publish subject to minor revisions (review by editor) (06 Apr 2020) by Patrick Chuang
AR by Peter Kuma on behalf of the Authors (23 Apr 2020)  Author's response    Manuscript
ED: Publish as is (28 Apr 2020) by Patrick Chuang
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Short summary
We evaluate clouds over the Southern Ocean in the climate model HadGEM3 and reanalysis MERRA-2 using ship-based ceilometer and radiosonde observations. We find the models underestimate cloud cover by 18–25 %, with clouds below 2 km dominant in reality but lacking in the models. We find a strong link between clouds, atmospheric stability and sea surface temperature in observations but not in the models, implying that sub-grid processes do not generate enough cloud in response to these conditions.
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