Journal
ATMOSPHERE-OCEAN
Volume 51, Issue 1, Pages 104-125Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/07055900.2012.755610
Keywords
global climate model; cloud parameterization; convection; radiative transfer
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Funding
- Environment Canada
- Canadian Foundation for Climate and Atmospheric Sciences (CFCAS)
- Climate Change Action Fund (CCAF)
- National Sciences and Engineering Research Council of Canada (NSERC)
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The Canadian Centre for Climate Modelling and Analysis (CCCma) has developed the fourth generation of the Canadian Atmospheric Global Climate Model (CanAM4). The new model includes substantially modified physical parameterizations compared to its predecessor. In particular, the treatment of clouds, cloud radiative effects, and precipitation has been modified. Aerosol direct and indirect effects are calculated based on a bulk aerosol scheme. Simulation results for present-day global climate are analyzed, with a focus on cloud radiative effects and precipitation. Good overall agreement is found between climatological mean short- and long-wave cloud radiative effects and observations from the Clouds and Earth's Radiant Energy System (CERES) experiment. An analysis of the responses of cloud radiative effects to variations in climate will be presented in a companion paper.
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