[MITgcm-devel] RE: [MITgcm-support] sea-ice, freeze, etc.

[Chris Hill]

While you guys are looking at this perhaps you can also think about how
to get to one sea-ice model instead of two. 

We ran out of time to talk about this last Wednesday but I think we are
all agreed that we really only want one sea-ice. But then the sea-ice
needs to be flexible and able to do competitively (in terms of skill and
compute cost) both simple themodynamics scenarios a la climate change,
glacial/inter-glacial and detailed scenarios like ECCO estimates and
greenland sea simulations.

Chris

> -----Original Message-----
> From: mitgcm-support-bounces at mitgcm.org 
> [mailto:mitgcm-support-bounces at mitgcm.org] On Behalf Of 
> Dimitris Menemenlis
> Sent: Saturday, November 01, 2003 12:36 PM
> To: mitgcm
> Subject: [MITgcm-support] sea-ice, freeze, etc.
> 
> 
> Jean-Michel and I have come up with following list of 
> suggested changes for the sea-ice models.
> 
> 1. The two sea-ice models and subroutine freeze will be moved 
> to forward_step, following loading of external fields and 
> preceding thermodynamnics.
> 
> 2. By default subroutine freeze will be 2-D and act at the 
> surface only.  That, and its new location, cause some small 
> changes to output.txt for three verification experiments.
> 
> 3. The sea-ice packages and subroutine freeze will modify 
> temperature directly but generate an array called 
> surfaceTendencyTice that keeps track of equivalent heat flux.
> 
> 4. Net surface heat and wind stress diagnostics will be added 
> to timeave_statvars.  These will include relaxation and sea-ice terms.
> 
> 5. Subroutine external_forcing_surf will remain.  It will be 
> called at very beginning (Jean-Michel's preference) or right 
> before thermodynamics.
> 
> 6. Qnet to include Qsw by default and signs of Qnet and Qsw 
> to change back to "positive for increase in theta", with 
> runtime options that maintain backward compatibility for the 
> verification experiments.
> 
> 7. Make sure that shortwave forcing does work without KPP.
> 
> 8. Surface salt flux changed to MKS units.  Sign convention 
> will depend on whether 6. is adopted.
> 
> 
> -- 
> Dimitris Menemenlis <menemenlis at jpl.nasa.gov>
> Jet Propulsion Lab, California Insitute of Technology
> MS 300-323, 4800 Oak Grove Dr, Pasadena CA 91109-8099
> tel: 818-354-1656;  fax: 818-393-6720
> 
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