[MITgcm-support] Tendencies from monthly output in ECCO v4-r2

[Ryan Abernathey]

Hi Erik,

We already have this setup running on our cluster. I can help produce the
output you need.

-Ryan

On Thu, Apr 6, 2017 at 2:41 PM, Jan-Erik Tesdal <tesdal at ldeo.columbia.edu>
wrote:

> Dear Gael,
>
> Thank you very much for your response! If I follow the directions in
> https://github.com/gaelforget/ECCO_v4_r2/blob/master/eccov4.pdf will I
> end up with WSLTMASS in nctiles format (and saved as netcdf file)? If not
> is there a way to convert the model output into the same formats as it is
> presented on the ftp site (ftp://mit.ecco-group.org/
> ecco_for_las/version_4/release2/nctiles_monthly/)?
>
> Best,
> Erik
>
> On Mar 21, 2017, at 3:21 PM, gael forget <gforget at mit.edu> wrote:
>
> Hi Erik,
>
> not sure but WSLTMASS could indeed be the culprit. You can generate these
> fields or, to be most consistent, output complete salt budgets by following
> directions in https://github.com/gaelforget/ECCO_v4_r2/blob/
> master/eccov4.pdf and editing https://github.com/
> gaelforget/ECCO_v4_r2/blob/master/input/data.diagnostics. The “budg2d_*”
> diagnostic sets, which are commented out in the online data.diagnostics,
> should include all variables needed for salt budgets.
>
> Cheers,
> Gael
>
>
>
> On Mar 18, 2017, at 5:25 PM, Jan-Erik Tesdal <tesdal at ldeo.columbia.edu>
> wrote:
>
> Hi all,
>
> I’m hoping that a member of this forum can help me with an issue regarding
> the ECCOv4-r2 output. I am curious as to whether I can get reasonable
> salinity tendencies from the ECCOv4 monthly outputs. I started comparing my
> calculated tendencies to the available tendencies that are on the ftp site
> (‘nctiles_tendencies/‘). Please see my calculations and figures here:
> https://github.com/jetesdal/ecco_analysis/blob/master/
> ecco_v4_slt_divergences.ipynb
>
> The tendencies that I derived from the monthly output (‘nctiles_monthly/‘)
> match pretty well with the budget output (‘nctiles_tendencies/‘). However,
> one major difference I can see is in the surface layer of the tendency
> fields due to advection. As far as I can tell the only thing that I am
> missing is the WSLTMASS term that is discussed in Chakraborty and Campin (
> http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm/doc/Heat_
> Salt_Budget_MITgcm.pdf?view=co&revision=1.1), but I am not sure where I
> can find this term.
>
> Is WSLTMASS the missing piece to my calculations, or is there another
> reason for these differences? Any suggestions are greatly appreciated!
>
> Thanks,
> Erik
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