[MITgcm-devel] updates on seaice code consolidation

[Matthew Mazloff]

Hello,

Thanks for the update!

I'm looking forward to the new code and am happy to test it when its  
ready.  Is there a verification experiment or somewhere I will be able  
to find the recommended flags and parameters for the latest version?

Also, what is the status of the stability of the sea-ice adjoint --  
should I be trying it with c62p?

Thanks,
-Matt





On Dec 9, 2010, at 1:24 PM, Patrick Heimbach wrote:

> Hi there,
>
> I am summarizing a brief telecon which we had today between
> JPL (Dimitris, Ian, An) and MIT (Gael, Jean-Michel, myself).
>
> Our goal is (has been for a while) to
> * incorporate Ian's changes into "main" code
> * clean up code
> * be able to get rid of the _if versions in pkg/seaice (and  
> MITgcm_contrib/ )
>
> The status as of September was:
> * the "legacy" code in pkg/seaice
> * the "_if" code in pkg/seaice
> * latest code from Ian in MITgcm_contrib (at my request) for the  
> purpose of merging with code in pkg/seaice
>
> At the time of Martin's and Dimitris' visit we had hoped to be able to
> run the MITgcm_contrib/ code, but attempts by several people to do so
> failed despite repeated iterations of fixes.
> Moving forward we had formulated a strategy at MIT to
> get a code that
> 1. tries to incorporate Ian's modifs,
> 2. do so in a controlled way (traceable via CVS),
> 3. cleans up many of the issues of legacy code (yneg, and many other  
> issues)
> 5. a cleaned-up sequence that is more amenable to modularization,  
> e.g. for coupling
>   (e.g. move age calculations and similar to separate routines,
>   deal with salinity code and salt_plume params),
> 5. solves non-conservation issues.
>
> Main work on 1.-4. was taken on by Gael, and item 5. tackled by  
> Martin.
> As far as I understand, starting point for Gael's merge was the  
> "legacy"
> code with main merges taken from _if routines.
>
> I guess this has gone a long way, but
> in order to bring it to successful completion we have the following  
> issues:
> 1. extent to which code improvements in Ian's MITgcm_contrib are  
> still missing
>   (Ian voiced concerns that some important terms described in his  
> thesis
>   as adapted from McPhee are still missing)
> 2. make sure that major setups that we are aware of run "successfully"
>   with the latest code, so that we can complete the clean-up
>
> To deal with 1. Ian has agreed to document what pieces are still  
> missing
> (forthcoming on mitgcm-devel).
>
> To deal with 2. some of the major setups need to re-run (and  
> retuned?).
> Especially, Matt who's probably the only one having used the _if code
> (I lost track which one) should re-run SOSE and see if he's happy  
> with "latest code".
> Suggestion is that this be done with the next checkpoint (c62p).
> "full list of setups are:
> * Matt: SOSE
> * Dimitris/Hong: ECCO2
> * An/Gunnar: Arctic
> * Gael/Patrick: ECCO-GODAE codes
> * Holly: Atlantic setup
> * Martin: his setup(s)
> * Ian: Lab Sea setup, with special focus on adjoint behaviour
>
> Hope I captured it all, not too confusing and not too inaccurate.
> Cheers
> -Patrick
>
> ---
> Patrick Heimbach | heimbach at mit.edu | http://www.mit.edu/~heimbach
> MIT | EAPS 54-1518 | 77 Massachusetts Ave | Cambridge MA 02139 USA
> FON +1-617-253-5259 | FAX +1-617-253-4464 | SKYPE patrick.heimbach
>
>
>
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