Coupled
Colorado State
Model
(CCoSM)
A Fully Coupled Atmosphere-ocean-seaice Simulation
Description
The geodesic ocean and sea ice models are coupled to a geodesic atmosphere. All
models are discretized into 10242 polygons (240 km resolution).
The ocean has 33 levels with a geometric vertical coordinate. KPP is used to parameterize the ocean boundary layer and vertical mixing. Monotone FCT is used to advect temperature and salinity. The seaice has 4 layers, with Semtner thermodynamics and FCT advection.
The atmosphere has 29 levels on a vertical sigma coordinate and has fully parameterized deep convection, cloud microphysics, radiation and gravity wave drag.
The coupler computes the interfacial fluxes of heat energy and momentum, atmospheric planetary boundary layer physics, and the SiB 2 land-surface parameterization. The ocean and sea ice are initialized with a 1 January restart from a previous prescribed atmosphere run. The atmosphere is initialized with at restart from a previous prescribed SST run. The system is integrated 25 months. The January means exclude the first January.
Results
Description
One year (1987) of ERA-40 reanalysis 6 hourly forcing obtained from the ECMWF
Data Server is repeated over 4 years to drive the dynamic geodesic ocean and
sea ice models.
The globe is discretized into 10242 polygons (240 km resolution). The ocean has 33 levels with a geometric vertical coordinate. KPP is used to parameterize the ocean boundary layer and vertical mixing. Monotone FCT is used to advect temperature and salinity.
The seaice has 4 layers, with Semtner thermodynamics and FCT advection. The ocean is initialized at rest with a 1 January climatological distribution of temperature and salinity. The ice is initialized at rest with realistic 1 January distributions of ice at 95% (90%) concentration in the northern (southern) hemisphere, thickness 2m (1m) and 0.2m snow cover, ice surface temperature of -1C and interior temperature 0C.
Results
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