Articles | Volume 14, issue 9
Geosci. Model Dev., 14, 5355–5372, 2021
https://doi.org/10.5194/gmd-14-5355-2021

Special issue: The Canadian Earth System Model version 5

Geosci. Model Dev., 14, 5355–5372, 2021
https://doi.org/10.5194/gmd-14-5355-2021

Model evaluation paper 31 Aug 2021

Model evaluation paper | 31 Aug 2021

Cloud Feedbacks from CanESM2 to CanESM5.0 and their influence on climate sensitivity

John G. Virgin et al.

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Short summary
Equilibrium climate sensitivity, or the amount of warming the Earth would exhibit a result of a doubling of atmospheric CO2, is a common metric used in assessments of climate models. Here, we compare climate sensitivity between two versions of the Canadian Earth System Model. We find the newest iteration of the model (version 5) to have higher climate sensitivity due to reductions in low-level clouds, which reflect radiation and cool the planet, as the surface warms.