1. Global, Basin and Shelf Ocean Applications of OPA An Inter-Agency Canadian Initiative EC-DFO-DND + Universities + Mercator-Ocean  CONCEPTS -- Canadian Operational network of Coupled Environmental PredicTion Systems Core project: to improve forecasting using coupled global atmosphere (GEM)+ocean (OPA) + ice with data assimilation  DFO ocean modelling coordination, new virtual center of excellence COMDA--Center for Ocean Model Development and Application Develop an ice-ocean modelling capacity for global, basins and shelf oceans; Link to DFO observation programs to derive datasets for model validation

2. Common Domains All grids consistent will be consistent with the Mercator ORCA025 model Global (1 º,1/4º) North Atlantic (1/4 º ) NW Atlantic (1/4º) EAST (1/12 º ) North Pacific (1 º,1/4 º ) NE Pacific (1/4 º, 1/12 º ) Arctic (1 º, 1/4 º ) 46 vertical levels

3. Lateral Open Boundary Condition  Flather’s condition for barotropic flow normal to the boundary:  Restoring T-S to prescribed values (e.g., taken from large-scale model or observed climatology) within a few grids near the boundary  Turn off advection of T-S within a few grids near the boundary

4. Shelf Model: Tides M 2 co-amplitude M 2 co-phase

5. Shelf Model: Impacts of Tides on SST Without tides With tides

6. Arctic Model: Sea Surface Height Annual mean, year 10

7. Global Model: Impacts of Tides on SST

8. Global Model: A Sensitivity Study Dependency of ice volume and thickness on changes in concentration associated with lead formation Lateral accretion of ice concentration in leads (Fichefet & Morales Maqueda 1997):

9. Sea Ice Volume

10. Ice Thickness and Extent MarchSeptember February September

11. Plans (DFO and Partners)  Shelf models: 1/12-deg resolution NW Atlantic; operational (e.g. C- NOOFS); ecosystem  Basin models: 1/4-deg resolution for N Atlantic, N Pacific and Arctic; data assimilation; CICE-OPA coupling; CICE-LIM inter- comparison; validation  Global model: “ORCA1”: assess model drift for longer (~50 year) run; test sensitivity to surface forcing; introduce inter-annually varying forcing; validation ORCA025 Couple OPA to NWP model (GEM)