[MITgcm-support] coarser cube-sphere grid

[Menemenlis, Dimitris (3248)]

Thanks Gael!
One question I have is how would someone who is not at MIT
access the directories you mention in gridsdispo.pdf
Would it make sense to make some of these files available
on a publicly-accessible server?

Annegret, I can vouch for the quality of Gael's grids.
I have been using the llc1080, llc2160, and llc4320
and accompanying bathymetries, and they all
work very beautifully.
For anyone on support list who wants to give these
higher-res configs a try, set-up details are here:
http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/llc_hires/

Cheers

Dimitris Menemenlis

On Nov 14, 2013, at 2:39 PM, Gael Forget wrote:

Hi Dimitris and Annegret,

I added the pdf to the cvs repository @ MITgcm_contrib/gael/gridsdispo.pdf<http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/gridsdispo.pdf?view=log>

In case a 1 degree resolution lat-lon-cap would suit your needs, the easiest
would be to get the one I used in ECCO version 4. To that end you
can use the script @ MITgcm_contrib/gael/setup_these_exps.csh<http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/setup_these_exps.csh?view=log>
There is a README in that directory as well.

If otherwise, you will find cube spheres and lat-lon-cap grids from very
coarse to very high resolution available, In the directory mentioned in
gridsdispo.pdf<http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/gridsdispo.pdf?view=log>  Bear in mind that only few of the available grids have
actually been run into MITgcm. They come with no guaranty although, to
this day, we have not detected any issue with the ones that have been used.

Cheers,
Gael



On Nov 14, 2013, at 10:47 AM, Menemenlis, Dimitris (3248) wrote:

Annegret, sorry for breaking link.  I moved file to
http://dl.dropboxusercontent.com/u/40292774/ECCO/gridsdispo.pdf

Gael, is there a more permanent version of this document under CVS somewhere?

Thanks

Dimitris Menemenlis

On Nov 14, 2013, at 6:47 AM, Annegret Krandick wrote:

Hi Dimitris,

I am going to use the MITgcm to investigate the sensitivity of open ocean convection in the North Atlantic to ice sheet melting. We therefore decided to use a Lat/Lon/Cap configuration or a part of it. I want to make myself familiar with this kind of grid and I want to ask if you could give me some information or a description of the LLC grids you mentioned in the MITgcm-support list two years ago (http://mitgcm.org/pipermail/mitgcm-support/2011-December/007557.html). Unfortunately, the link to this description of the LLC grids doesn't work anymore.

Thanks a lot and with kind regards

Annegret Krandick


On Dec 1, 2011, at 8:32 AM, Menemenlis, Dimitris (3248) wrote:

Alan, I have not generated a global CS grid at ~40-km spacing.
I cc this answer to support list in case someone else has a ~40-km grid readily available.
If not your options are the following:

1. Generate a cube-sphere grid from scratch using scripts in
http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/high_res_cube/

2. Adopt the new lat/lon/cap (LLC) grid for which grids are readily available at
4, 2, 1, 1/3, 1/6, 1/12, 1/24, and 1/48 degree grids.

I recommend you go with option 2 as this is where MITgcm/ECCO effort as a whole
is heading.  A description of the LLC grids and how to obtain them is here:
http://dl.dropbox.com/u/40292774/ECCO3/gridsdispo.pdf

Cheers

Dimitris


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