[MITgcm-support] What is the use of "gendata.m" in "verification/tutorial_barotropic_gyre"?

[Martin Losch]

Hi Moon,

XC, YC are the coordinates of you grid centers/divergence/pressure/skalar points (usually in longitude/latitude, but for cartesian grids in meters relative to some origin), DXC, DYC are the distances between these grid points in meters. The XG,YG are the coordinates of the corner/vorticity points, DXG, DYG the corresponding distances (grid spacing!).
RC, RF are the depths of the cell centers (C) and cell faces (F), DRC, DRF are the distances between those (in meters or pressure coordinates).
Please, have a look at the head of model/inc/GRID.h which summarizes these grid variables nicely, I believe. That’s also where they are defined.

The “PH” variables are the pressure potential anomalies (im m^2/s^2) and these have just been discussed a few days ago. People don’t look at them too often.
“ref” in a name stands for “reference”.

For tailored output I recommend using the diagnostics package!

Martin

On Nov 25, 2013, at 9:23 AM, Moon <lzl124631x at 163.com> wrote:

> Hi, Jean
> Thanks a lot! Embarrassed for missing those words in the user manual. However, after searching through the user manual, I still cannot find the meaning of some prefixes of data/meta files. Below is my summary, with purple denoting those I've found definition, blue denoting those I have not and some other I'm not sure. Can you give me some hints?
> Yours Sincerely,
> Moon
> 
> Depth     Bathymetry
> DRC     Section 2.11.5
> DRF     Section 2.11.5
> DXC     Section 2.11.4
> DXG     Section 2.11.4
> DYC     Section 2.11.4
> DYG     Section 2.11.4
> Eta     ocean: surface elevation (m), atmosphere: surface pressure anomaly (Pa).
> hFacC     Section 2.11.6
> hFacS     Section 2.11.6
> hFacW     Section 2.11.6
> PH
> PHL
> PHrefC
> PHrefF
> RAC     Section 2.11.4
> RAS     Section 2.11.4
> RAW     Section 2.11.4
> RAZ     Section 2.11.4
> RC     Maybe related to coordinate, but is it saved in DRC?
> RF     Maybe related to coordinate, but is it saved in DRF?
> RhoRef
> S     ocean: salinity (psu), atmosphere: water vapor (g/kg).
> T     potential temperature (ocean: C, atmosphere: K).
> U     zonal component of velocity field (m/s and positive eastward).
> V     meridional component of velocity field (m/s and positive northward).
> W     vertical component of velocity field (ocean: m/s and positive upward, atmosphere: Pa/s and positive towards increasing pressure i.e. downward).
> XC     Maybe related to coordinate, but is it saved in DXC?
> XG     Maybe related to coordinate, but is it saved in DXG?
> YC     Maybe related to coordinate, but is it saved in DYC?
> YG     Maybe related to coordinate, but is it saved in DXG?
> 
> 
> 
> 
> 
> 
> At 2013-11-25 00:01:25,"Jean-Michel Campin" <jmc at ocean.mit.edu
> > wrote:
> >Hi,
> >Please take a look at the manual, section 3.9.3.4 and 3.9.3.5
> >Jean-Michel
> >
> >On Fri, Nov 22, 2013 at 11:37:56AM +0800, Moon wrote:
> >> What is the use of "gendata.m" in "verification/tutorial_barotropic_gyre"?
> >
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