Articles | Volume 17, issue 1
Atmos. Chem. Phys., 17, 21–29, 2017
https://doi.org/10.5194/acp-17-21-2017
Atmos. Chem. Phys., 17, 21–29, 2017
https://doi.org/10.5194/acp-17-21-2017

Research article 02 Jan 2017

Research article | 02 Jan 2017

Why do general circulation models overestimate the aerosol cloud lifetime effect? A case study comparing CAM5 and a CRM

Cheng Zhou and Joyce E. Penner

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AR by C. Zhou on behalf of the Authors (07 Dec 2016)  Author's response    Manuscript
ED: Publish subject to technical corrections (08 Dec 2016) by Barbara Ervens
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Short summary
Observation-based studies have shown that the aerosol cloud lifetime effect or the increase of cloud liquid water with increased aerosol loading may have been overestimated in climate models. Here, by simulating the same shallow, warm clouds using a global climate model (CAM5) and a cloud resolving model (CRM) which has more complete and detailed cloud physics, we show how a climate model can overestimate the aerosol cloud lifetime effect due to its simplified representation of cloud processes.
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