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.

Model code and software

The Canadian Earth System Model (CanESM) - v5.0.3 Neil C. Swart, Jason Cole, Slava Kharin, Mike Lazare, John Scinocca, Nathan Gillett, James Anstey, Vivek Arora, James Christian, Sarah Hanna, Yanjun Jiao, Warren Lee, Fouad Majaess, Oleg Saenko, Christian Seiler, Clint Seinen, Andrew Shao, Larry Solheim, Knut von Salzen, Duo Yang, and Barbara Winter https://doi.org/10.5281/zenodo.3251114

CCCma CanESM5 model output prepared for CMIP6 CMIP. Version 20190429 Neil Cameron Swart, Jason N. S. Cole, Viatcheslav V. Kharin, Mike Lazare, John F. Scinocca, Nathan P. Gillett, James Anstey, Vivek Arora, James R. Christian, Yanjun Jiao, Warren G. Lee, Fouad Majaess, Oleg A. Saenko, Christian Seiler, Clint Seinen, Andrew Shao, Larry Solheim, Knut von Salzen, Duo Yang, Barbara Winter, and Michael Sigmond https://doi.org/10.22033/ESGF/CMIP6.1303

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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.