[MITgcm-support] gendata.m

[Menemenlis, Dimitris (329C)]

Also there’s a couple of ~1/4-deg-ish configurations that are ready-ish to go,
that you can use as templates.

A very old one on a latitude-longitude grid, that stops at ~80N, i.e., no Arctic Ocean:
http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/quarter_degree_global/

A more recent one on a so-called cube sphere grid:
http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/high_res_cube/

And state-of-the-art-ish on lat-lon-cap grid:
http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/llc_hires/llc_270/

> On Nov 26, 2015, at 1:27 AM, Martin Losch <Martin.Losch at awi.de> wrote:
> 
> Hi Tony,
> 
> I am afraid that you will have to do this on your own, and it’s pretty obvious:
> - Find databases for bathymetry and forcing that you like or think are appropriate
> - interpolate (at least bathymetry) to your model grid. 
> - for bathymetry you have to make sure that you domain is “sensible”, i.e. you don’t have bays without a connection to the ocean, etc. There’s a recent paper by Alistair Adcroft (2013, Ocean Modelling, doi:10.1016/j.ocemod.2013.03.002.), where he discusses some aspects of this.
> - for the forcing you can use the interpolation capabilities of the exf-package, there’s an example in “global_with_exf”. I suggest to study the exf-package a little, because it makes importing forcing much simpler (in most cases) <http://mitgcm.org/public/r2_manual/latest/online_documents/node246.html>
> - you can see how you generate the input format in matlab in many “gendata.m” file in the verification experiment (cd verification && ls */input*/gendata.m)
> 
> Martin
> 
>> On 26 Nov 2015, at 02:37, Guiting Song <guitingsong at gmail.com> wrote:
>> 
>> Hi, Martin,
>> 
>> Many thanks for your reply. Then, could you suggest how to generate the input data for a realistic domain especially for a global run at about 0.25 degree resolution? I am a new player for MITgcm, I search for a long time and study your mannual. But I am still not sure how to generate the input data such as bathymatry, wind forcing and climatology for MITgcm.
>> 
>> 
>> 
>> Best regards,
>> Tony
>> 
>> 
>> 
>> 
>> On Wed, Nov 25, 2015 at 6:45 PM, Martin Losch <Martin.Losch at awi.de> wrote:
>> Hi Tony,
>> 
>> that’s probably an error in the documentation, an erroneous copy and paste from a different experiment description. The text should just read:
>> 
>> "The input/bathymetry.bin file specifies a two-dimensional (x,y) map of depth values. The file contains a raw binary stream of data that is enumerated in the same way as standard MITgcm two-dimensional, horizontal arrays.”
>> 
>> There is no “gendata.m” associated with this experiement (because it is quite involved to generate the input data for a realistic domain). Sorry about that, I’ll fix the documentation.
>> 
>> M.
>> 
>> 
>> 
>> 
>> 
>> 
>>> On 25 Nov 2015, at 08:33, Guiting Song <guitingsong at gmail.com> wrote:
>>> 
>>> In the user manual section of 3.12 Global Ocean Simulation at 4 Resolution, mentioned that The included matlab program input/gendata.m gives a complete code for creating the input/topog.box file.
>>> 
>>> However, from my download version, there is no such a file, is anybody willing to share me this file?
>>> 
>>> Best regards,
>>> Tony
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>> 
>> 
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