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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Latest update: 18 Sep 2021
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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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