[MITgcm-support] Ice thickness category diagnostics

[David Huard]

Ok, thanks, that clears things up.


On Fri, Feb 8, 2013 at 10:19 AM, Martin Losch <Martin.Losch at awi.de> wrote:

> The seaice-model is based on Hibler (1979). That means ice growth and
> melting is done in terms of one ice volume per grid cell (HEFF) and
> concentration (AREA). The mulitcategory stuff is only used to compute the
> heat flux. This makes sure that even for very thick ice, there is always a
> fraction (1/multidim = 1/7 by default) of relatively thin ice. The heat
> flux through this part of the ice is larger than for the rest, so that the
> heat flux averaged over all "categories" is non-zero even for very thick
> ice. This is not much more than a numerical trick, I believe. And yes, it
> means, that when ice grows, each "category" grows by the same fraction.
>
> True multicategory ice with an evolving thickness distribution is in the
> pipeline, but I don't know the status of that.
>
> Martin
>
>
> On Feb 8, 2013, at 3:58 PM, David Huard <david.huard at gmail.com> wrote:
>
> > Do you mean that when the model creates new ice, it creates a fixed
> fraction of ice in each category ? 15 % of thin ice, 15% of thick ice, etc ?
> >
> > David
> >
> >
> > On Fri, Feb 8, 2013 at 9:31 AM, Martin Losch <Martin.Losch at awi.de>
> wrote:
> > On Feb 8, 2013, at 3:22 PM, David Huard <david.huard at gmail.com> wrote:
> >
> > > What about the ice thickness categories ? Is there a way to get those
> fields individually rather than as a bulk concentration ?
> >
> > Are you talking about the "SEAICE_MULTICATEGORY"-code? This code only
> assumes a fixed distribution (in fact, it is homogeneous) of "actual" ice
> thicknesses h (as opposed to HEFF = h*AREA), so there is no reason to save
> the extra fields.
> > siTICES gives the surface temperatures for each category, if that is of
> any help.
> >
> > Martin
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mitgcm.org/mailman/listinfo/mitgcm-support
> >
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mitgcm.org/mailman/listinfo/mitgcm-support
>
>
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mitgcm.org/mailman/listinfo/mitgcm-support
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mitgcm.org/pipermail/mitgcm-support/attachments/20130208/076ecc06/attachment.htm>