Provided by Canadian Meteorological Center (CMC), CAN
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.
GEM 5.0km atmosphere-only#
with grid information contained in
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.
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