Dear Stephen,
On Thu, 2008-11-06 at 12:16 -0500, Stephen Griffies wrote:
> >
> > (1) There are no standard_names including "laplacian" yet - it would
> > seem to be the default (coeffs in m2/s).
> >
> >
>
> I introduced the "laplacian" name to distinguish from the "biharmonic"
> now included in my proposed list. Are you suggesting to drop
> "laplacian" and let that be the default, unless otherwise noted by a
> "biharmonic" name? Indeed, that is just what is done in my list for
> vertical mixing (in fact, I know of no ocean model that employs a
> biharmonic operator for vertical mixing). In summary, I am not
> strongly in favour one way or the other for the lateral, but initially
> suggested the name "laplacian" to remain symmetric with the name
> "biharmonic." I can readily drop this for the lateral if that is
> strongly favoured.
>
As long as they don't clash with existing names that don't have
laplacian in them, and as far as I can see they don't, I don't mind.
>
> > (2) There are lots of "ocean_vertical_..." diffusivities (see table);
> > perhaps you need to to preface yours as "ocean_lateral_..." (I don't
> > know; I'm no expert.)
> >
>
>
> Below again are the lateral SGS fields. For physical reasons, I do not
> believe the added name "lateral" is needed, since there is already in
> the proposed name a specification that encompasses more precisely what
> the term "lateral" would otherwise provide. For example,
> "ocean_tracer_bolus_laplacian_diffusivity" would not be more clearly
> stated as "ocean_tracer_bolus_lateral_laplacian_diffusivity", since
> there is physically no corresponding
> "ocean_tracer_bolus_vertical_laplacian_diffusivity"; the term "bolus" is
> sufficient. Likewise, "ocean_tracer_epineutral_biharmonic_diffusivity"
> would not be better written as
> "ocean_tracer_epineutral_lateral_biharmonic_diffusivity", since there is
> no "ocean_tracer_epineutral_vertical_biharmonic_diffusivity"; the term
> "epineutral" serves to fully specify the diffusivity.
>
>
Fair enough.
Regards,
Ian.
> Best,
> Stephen
>
>
>
> LATERAL SUBGRID SCALE FIELDS
> ocean_tracer_bolus_laplacian_diffusivity m2/s
> ocean_tracer_bolus_biharmonic_diffusivity m2/s
> ocean_tracer_epineutral_laplacian_diffusivity m2/s
> ocean_tracer_epineutral_biharmonic_diffusivity m2/s
> ocean_tracer_xy_laplacian_diffusivity m2/s
> ocean_tracer_xy_biharmonic_diffusivity m4/s
> tendency_of_ocean_eddy_kinetic_energy_content_due_to_bolus_transport W/m2
> ocean_momentum_xy_laplacian_diffusivity
> m2/s
> ocean_momentum_xy_biharmonic_diffusivity m4/s
> ocean_kinetic_energy_dissipation_per_unit_area_due_to_xy_friction W/m2
--
Ian Culverwell B-2-81 Ocean and Sea Ice Modelling
Met Office FitzRoy Road Exeter Devon EX1 3PB United Kingdom
Tel: +44 (0)1392 884017 Fax: +44 (0)1392 885861
E-mail: ian.culverwell at metoffice.gov.uk http://www.metoffice.gov.uk
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Received on Fri Nov 07 2008 - 01:11:55 GMT
