.. _GEM-DYAMOND-WINTER: GEM ======= **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 https://github.com/ECCC-ASTD-MRD/gem. Experiment runs ----------------- GEM 5.0km atmosphere-only ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Location: :file:`/fastdata/ka1081/DYAMOND/data/winter_data/DYAMOND_WINTER/CMC/GEM/DW-ATM/` with grid information contained in :file:`atmos/fx/gn/` Setup: Atmosphere-only 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. Resolution: * 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. Comments: * 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: https://github.com/ECCC-ASTD-MRD/gem. Data description: *Comming soon.* Contact person: `Ron McTaggart-Cowan (ECCC) `__ See also --------