Dear all,
Just to mention that in principle ocean_vertical_diffusivity should be already available within CF standard name table, I remember we discussed on this last Christmas.
Cheers
Olivier
-----Message d'origine-----
De?: cf-metadata-bounces at cgd.ucar.edu [mailto:cf-metadata-bounces at cgd.ucar.edu] De la part de Martina Stockhause
Envoy??: mardi 24 juin 2008 17:23
??: cf-metadata at cgd.ucar.edu
Cc?: Jonathan Gregory
Objet?: Re: [CF-metadata] Missing standardnames for our our ocean modelMPI-OM
Dear Jonathan,
sorry for the delay. I wanted to discuss your question with our ocean modeller
and couldn't reach him until today. This is his answer:
> > > Could you describe
> > > what you mean by "due to wind" in the case of diffusivity?
> >
> > "due_to_wind" means induced by winds on the surface.
>
> Do you mean wind-driven mixing (in the mixed layer) is represented by a
> diffusion scheme, and you have other diffusion schemes (with different
> diffusivities) for interior mixing resulting from other kinds of
> turbulence?
"As default we use Richardson-Number depended mixing following Pacanowski
and Philander plus an additional wind induced mixing term which decays
exponentially with depth . Both is included in ocean_vertical_diffusivity,
however the wind induced part can be diagnosed separately
(ocean_vertical_diffusivity_due_to_wind)."
Maybe, it would be clearer to use "due_to_wind_mixing" instead
of "due_to_wind". Which one is more precise/understandable?
> > > > 1. richardson_number; 1
> > >
> > > I'd suggest this should be richardson_number_in_sea_water since it
> > > could also be defined in air.
Agreed, richardson_number_in_sea_water seems to be more consistent.
> > > > 3. water_flux_in_ocean_without_flux_correction; m s-1 [kg m-2 s-1]
>
> OK - I can't think of anything better! It's "into_ocean", not "in_ocean",
> by the way. I think we agree the units are kg m-2 s-1 for the stdname table
> (numerically equal to mm s-1).
Thank you for spotting this. And yes, we agree on the unit in the standard
name table.
To sum up our altered proposal:
richardson_number_in_sea_water; 1
ocean_vertical_viscosity; m2 s-1
ocean_vertical_diffusivity; m2 s-1
ocean_vertical_diffusivity_due_to_wind or
ocean_vertical_diffusivity_due_to_wind_mixing; m2 s-1
water_flux_into_ocean_without_flux_correction; kg m-2 s-1
Can we agree on the names for the two energy tendencies? We haven't discussed
them so far.
4. energy tendencies
tendency_of_potential_energy_content_of_ocean_layer_due_to_diffusion; W m-2
tendency_of_potential_energy_content_of_ocean_layer_due_to_convection; W m-2
Regarding the "where_sea" parameters, we wait for the decision of ticket 17?
5. some "where_sea" parameters
surface_net_downward_radiative_flux_where_sea; W m-2
surface_net_downward_shortwave_flux_where_sea; W m-2
surface_net_downward_longwave_flux_where_sea; W m-2
surface_downward_latent_heat_flux_where_sea; W m-2
surface_downward_sensible_heat_flux_where_sea; W m-2
Best wishes,
Martina
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Received on Thu Jun 26 2008 - 06:49:32 BST
