[CF-metadata] new named fields for ocean

[Karl Taylor]

Dear Alison and Stephen,

A few comments on the ocean standard names:

> 
> 2.10 cell_mass_per_area; kg m-2.  Does this mean the mass per unit area
> of the sea water contained within each grid cell?  If so, I suggest the
> name should be mass_of_sea_water_per_unit_area which would be similar to
> the existing name atmosphere_mass_of_air_per_unit_area.

We distinguish currently between atmosphere_mass_per_unit_area and 
atmosphere_mass_of_air_per_unit_area (which only accounts for the 
gaseous constituents, not, for example, precipitation).  For the oceans 
I think Stephen wants to save the total mass, i.e., 
seawater_mass_per_unit_area.
> 

> 
> 7.5 heat_flux_into_sea_water_due_to_sea_ice_thermodynamics; W m-2. OK.

In CMIP3 we collected upward_sea_ice_basal_heat_flux, which is a CF 
standard name, which we described in CMIP3 as "Compute the average rate 
that heat flows up at the base of the sea ice (i.e., Watts) divided by 
the average area of the grid cell covered by sea ice. This quantity 
multiplied both by the average area covered by sea ice and by the length 
of the month should yield the total energy flowing into the ice from 
below. Report as 0.0 in regions free of sea ice."

Is that the same thing except for a factor that is the fraction of the 
ocean covered by seaice?


> 9.12
> ocean_kinetic_energy_dissipation_per_unit_area_due_to_vertical_friction;
> W m-2. OK.

I don't find this particularly enlightening.  What distinguishes 
"vertical friction" for other friction?

best regards,
Karl