[Mitgcm-support] Re: sea-ice code

[mitgcm-support at dev.mitgcm.org]

Dimitris,

  Isolating the surface/flux bulk formula as much as possible
  and aligning/merging the formulation with exf/ would be
  a big help.
  Can you make sure you coordinate the exf/ stuff with Patrick.
  I tried calling but you are AWOL. The open-water exf/ stuff
  has already been excrutiatingly verified by the Patrick/Detlef 
  etc...


Chris 
  
Dimitris Menemenlis wrote:
> 
> Alistair, would you be able to recall the conversation you had with Jinlun
> Zhang about sea-ice dynamic solver, and to summarize your recommendations in a
> brief e-mail?  This would help get the ball rolling in the right direction.
> 
> The relevant references that describe Jinlun's sea-ice code, as included in
> the MITgcm, are in release1_p9:verification/lab_sea/seaice.ps
> 
> In the coming weeks, I am planning to combine the seaice and exf packages
> together.  Before this morning's phone call, I would have left the sea-ice
> bulk formulae of pkg/seaice intact.  But it may make sense to replace/combine
> them with those of pkg/exf and to move all the open-water bulk formulae code
> to pkg/exf.  Is this what MIT folks would like to have?
> 
> The bulk formulae for open-water momentum default to equation 2 of Hibler 79,
> with a quadratic drag coefficient (search for windx and windy in
> pkg/seaice/dynsolver).  These could easily be replaced with pkg/exf bulk
> formulae to provide wind stress at top of sea-ice/open water (albeit with a
> modified formulation of drag coefficient over cells that are partially or
> completely covered with sea-ice).
> 
> The bulk formulae for sensible and latent heat fluxes are based on Hibler 80,
> equation B1 (search for qneto in budget.F).  These could also be combined with
> package exf, but the separation is not as clean as for momentum because cells
> that are partially or completely covered with sea-ice still require knowledge
> of atmospheric conditions, not of fluxes.
> 
> Dimitris
> 
> --
> Dimitris Menemenlis                      menemenlis at jpl.nasa.gov
> Jet Propulsion Lab, MS 300-323           tel: 818-354-1656
> 4800 Oak Grove Dr, Pasadena CA 91109     fax: 818-393-6720