Provided by Canadian Meteorological Center (CMC), CAN

Model description#

The Global Environmental Multiscale (GEM) model is developed by the Numerical Weather Prediction Research Section at Environment and Climate Change Canada (ECCC). It uses a Yin-Yang grid for global integrations. More information can be found in Girard et al. (2014) and McTaggart-Cowan et al. (2019), and source code is available at ECCC-ASTD-MRD/gem.

Experiment runs#

GEM 5.0km atmosphere-only#



with grid information contained in atmos/fx/gn/



The CMC DYAMOND simulations did not include a coupled ocean, nor a complete chemistry model. The model physics configuration matches that described by McTaggart-Cowan et al. (2019), but without parameterized convection.

  • In the horizontal, a 5km grid spacing is used.

  • In the vertical, the model uses the operational L84 configuration with a top at 0.1 hPa, 12 levels below 850 hPa, and the first momentum level at 20m above the surface (thermodynamic level at 10m above the surface).

  • For all model componenets, a 150s model time step is used.

  • This run uses DYAMOND-prescribed SST and sea ice forcings.

  • Soil properties are taken from the CMC operational land surface analysis.

  • The base-layer sea surface temperature followed the prescribed forcings, with a parameterization based on Zheng and Beljaars (2005) used to represent mixed-layer and cool-skin effects.

  • Minimal model documentation is available in github: ECCC-ASTD-MRD/gem.

Data description:

Comming soon.

Contact person:

Ron McTaggart-Cowan (ECCC)

See also#