[MITgcm-support] MITgcm 40km resolution Arctic simulation

[Menemenlis, Dimitris (3248)]

Hi Jonny, you need to add
#define OLD_GRID_IO
in CPP_OPTIONS.h

The 40-km set-up hasn't been touched for quite a while so there will be several
options and parameters that are out of date.

If you do manage to get it to work, please send updated code and input files
and I will check them in for next user.

As a possible guideline of things to change, one place that might be helpful is:
http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/MPMice/beaufort
(although there's coupled code stuff there that you don't need).

Also slightly less out of date set-up available here:
http://ecco2.jpl.nasa.gov/data1/arctic/code2/
http://ecco2.jpl.nasa.gov/data1/arctic/run_template2/
This is a 36-km set-up and the nice thing is that there
is open boundary conditions available from ECCO2 project
and a whole bunch of increasingly higher-res configs, all the
way to 1-km horizontal grid spacing ready to go.
Again, if you use any of the above and you find
discrepancies or updates, please let me know and
I will try to help and also update the instructions for next user.

I cc MITgcm support for more suggestions.

Cheers

Dimitris Menemenlis

On Oct 16, 2013, at 4:42 AM, Jonny Williams wrote:

Hi again!

I've now managed to download the files I need I think and have been going through some run-time error

The first error was as follows

S/R INI_PARMS: "thetaMin" no longer allowed, has been replaced by "xgOrigin"
S/R INI_PARMS: "phiMin" no longer allowed, has been replaced by "ygOrigin"

I have managed to get round by replacing thetaMin and phiMin with xgOrigin and ygOrigin respectively.

The second error was as follows

S/R INI_PARMS: tauSaltClimRelax > 0 but
S/R INI_PARMS: saltClimFile is undefined

I have fixed this for now by setting tauSaltClimRelax=0

The error which has floored me now is the following

PGFIO-F-209/OPEN/unit=9/'OLD' specified for file which does not exist.
File name = tile001.mitgrid
In source file mdsio_facef_read.f, at line number 740

The offending line in mdsio_facef_read.f reads

OPEN( dUnit, file=fName(1:iLen), status='old',

I have done a 'grep' search in the arctic40km directory and there is no mention of tile001.mitgrid at all so perhaps this code is out of date?

Do you have any ideas about how to fix this issue?

Many thanks once again. I'm looking forward to getting this model running!

Jonny

On 11 October 2013 21:00, Menemenlis, Dimitris (3248) <Dimitris.Menemenlis at jpl.nasa.gov<mailto:Dimitris.Menemenlis at jpl.nasa.gov>> wrote:
Hi Johnny, the files you are looking for appear to be available here:
http://mit.ecco-group.org/datasets/MITgcm_input_files/MITgcm_contrib/arctic40km/input/

Cheers

Dimitris Menemenlis

On Oct 11, 2013, at 10:20 AM, Jinlun Zhang wrote:

Hi Jonny, I doubt it is still available. But I am not sure and referring this to Dimitris. Dimitris, could you help Jonny - thanks.
Best,
Jinlun

On 10/11/2013 2:10 AM, Jonny Williams wrote:
Dear Dr Zhang

I am a postdoc researcher at the University of Bristol in the UK and I am starting to work on regional ocean modelling. I am trying to download and run the "arctic40km" configuration and the documentation for this states that users should contact you when trying to do this.

I have downloaded the base directory (cvs co -d arctic40km MITgcm_contrib/arctic40km) but when I try to download the input data (wget -nd -r -A"*.bin" http://channel.mit.edu/datasets/MITgcm_input_files/MITgcm_contrib/arctic40km/input) the download fails with the following error...

"Connecting to channel.mit.edu<http://channel.mit.edu/>|18.83.0.150|:80... failed: Connection timed out."

Do you know is it still possible to run this example?

Many thanks for any assistance that you are able to provide!

Best wishes

Jonny Williams

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