[Go-essp-tech] Searching for gridspec files

[Sylvia Murphy]

Hi Jennifer,

I cannot help you with gridspec files per se, but I did want to
point out to you that grid information associated with CMIP5
simulations was collected by the Metafor questionnaire and ingested
and displayed in the Earth System Grid (ESG) trackback.  Below are a
couple of links to some instances of simulations with grid information
from the models you were interested in.  Just click on the link below
and then click on the grid tab.  If any of this information is useful
to you, I will try and find other instances of the models you are
looking for.

http://www.earthsystemgrid.org/trackback/query.htm?id=esg%3amodel_mpi-esm-lr_abrupt4xco2-lr&session=true&fromSearch=true
http://www.earthsystemgrid.org/trackback/query.htm?id=esg%3amodel_gfdl-cm3_picontrol_cm3&session=true&fromSearch=true
http://www.earthsystemgrid.org/trackback/query.htm?id=esg%3amodel_giss-e2-r_past1000_giss-e2-r_p121&session=true&fromSearch=true

If you want to search for yourself, I suggest starting at the NCAR Gateway at:
http://www.earthsystemgrid.org/home.htm
Then selecting "simulation metadata" metadata from the faceted search
on the left and then typing the model name into the text box.

Cheers,

Sylvia

On Mon, Jul 23, 2012 at 11:39 AM, Jennifer Adams <jma at cola.iges.org> wrote:
> Hi, Everyone --
> I have downloaded the transix and transiy variables for the historical
> experiment (realm=seaIce,frequency=mon,MIP=OImon) for the following models:
>
> CMCC.CMCC-CM/
> CMCC.CMCC-CMS/
> CNRM-CERFACS.CNRM-CM5/
> CSIRO-BOM.ACCESS1-0/
> CSIRO-BOM.ACCESS1-3/
> CSIRO-QCCCE.CSIRO-Mk3-6-0/
> INM.inmcm4/
> IPSL.IPSL-CM5A-LR/
> IPSL.IPSL-CM5A-MR/
> IPSL.IPSL-CM5B-LR/
> MIROC.MIROC4h/
> MIROC.MIROC5/
> MIROC.MIROC-ESM/
> MIROC.MIROC-ESM-CHEM/
> MPI-M.MPI-ESM-LR/
> MPI-M.MPI-ESM-MR/
> MPI-M.MPI-ESM-P/
> MRI.MRI-CGCM3/
> NASA-GISS.GISS-E2-H/
> NASA-GISS.GISS-E2-R/
> NASA-GISS.GISS-E2-R-CC/
> NCC.NorESM1-M/
> NCC.NorESM1-ME/
> NOAA-GFDL.GFDL-CM3/
> NOAA-GFDL.GFDL-ESM2G/
> NOAA-GFDL.GFDL-ESM2M/
>
> The vector components transix and transiy are grid relative, and in order to
> display them properly, I need to rotate them to earth-relative coordinates.
> On page 10 of the document titled "CMIP5 Model Output Requirements: File
> Contents and Format, Data Structure and Metadata" , it says:  "… for grids
> other than Cartesian latitude-longitude grids, a file recording all the grid
> configuration information called for by gridpsec must be created for each
> modeling realm…" The name of this gridspec file is provided in the global
> attribute named associated_files in all data files. Unfortunately, as far as
> I can tell by searching with P2P, the gridspec files have not been published
> by any institute except GFDL.
>
> I have grabbed all the GFDL gridspec files that are available via ESGF. Here
> is the relevant output from ncdump on one that matches my data,
> "gridspec_seaIce_fx_GFDL-CM3_historical_r0i0p0.nc" :
>
> dimensions:
>         nxp = 721 ;
>         nyp = 401 ;
> variables:
>         double angle_dx(nyp, nxp) ;
>                 angle_dx:standard_name =
> "grid_vertex_x_angle_WRT_geographic_east" ;
>                 angle_dx:units = "degrees_east" ;
>
> There is the variable I desire, angle_dx, but it is on a 721x401 grid.
> The native grid of the data file
> transix_OImon_GFDL-CM3_historical_r1i1p1_186001-186412.nc is 360x200.
> I cannot use the angle_dx variable in this gridspec file because it doesn't
> match the data.
>
> Here are my questions: Do accurate gridspec files exist? How can I acquire
> them?
>
> --Jennifer
>
>
>
>
>
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org
>
>
>
>
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> GO-ESSP-TECH at ucar.edu
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>



-- 
******************************************
Sylvia Murphy
NESII/CIRES/NOAA Earth System Research Laboratory
325 Broadway, Boulder CO 80305
Time Zone: U.S. Mountain
Web: http://www.esrl.noaa.gov/nesii/
Email: sylvia.murphy at noaa.gov
Phone: 303-497-7753