[MITgcm-support] build errors for llc_1080

[Ryan Abernathey]

I have tried with checkpoint64p, 65v, and the latest master. They all fail
in the same way, although I have not done this full test matrix for each
checkpoint.

I am trying to replicate your initial run on pleaides as closely as
possible. So I have not changed any of the initial conditions or forcing
files from what was originally used. It is particularly distressing that
the pickup file doesn't work, because that presumably represents a stable,
self-consistent initial condition.

I will try on yellowstone later this week. That might help rule out certain
machine / compiler dependent problems.

Best,
Ryan


On Tue, Nov 29, 2016 at 7:41 PM, Dimitris Menemenlis <dmenemenlis at gmail.com>
wrote:

> Hi Ryan, one thought is that if atmospheric forcing or oceanic state
> is incompatible with initial sea ice conditions, you can have a very large
> impulse on first time step as you melt a lot of ice (that would cause
> freshening
> of surface layer but I don’t think that model would crash) or a lot of
> freezing,
> which would destabilize the surface level.  But that does not explain why
> cases 2, 3, and 7 fail.
>
> Question: are you trying to run with latest MITgcm code, or did you
> download "cvs co -r checkpoint64p MITgcm_code”
> to try and match vintage of instructions and configuration?
>
> Dimitris Menemenlis
>
> On Nov 29, 2016, at 1:29 PM, Ryan Abernathey <ryan.abernathey at gmail.com>
> wrote:
>
> These suggestions are great (and also obvious, but only in retrospect of
> course!)
>
> I also downloaded a pickup file from pleaides and tried thiat.
>
> Here is a table of what works.
>
> initial condition              | exf | seaice | success?
> -------------------------------|-----|--------|---------
> Jan2010_THETA_1080x14040x90_r4 |  Y  |   Y    |  N
> Jan2010_THETA_1080x14040x90_r4 |  Y  |   N    |  N
> Jan2010_THETA_1080x14040x90_r4 |  N  |   N    |  N
> uniform                        |  Y  |   Y    |  N
> uniform                        |  Y  |   N    |  Y
> uniform                        |  N  |   N    |  Y
> pickup.0000002880              |  N  |   N    |  N
>
>
> The only cases that work involve uniform initial conditions. With these,
> it works with exf enabled, but not seaice.
>
> I thought perhaps my initial conditions files were corrupted. (Still have
> not done checksums, sorry.) But the test with the pickup suggests that the
> problem is deeper.
>
> I will keep digging.
>
> Thanks again for the help!
>
> -Ryan
>
>
>
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