[gradsusr] SDF file does not have any non-coordinate variables
Jennifer Adams
jma at cola.iges.org
Tue Feb 8 12:18:50 EST 2011
Weird! The differences between the ncdumps may be more relevant that
you think, if you can read one file but not the other. Try skipping
xdfopen and go ahead and write a full-blown descriptor for 'open'. If
that doesn't work, then I'll need a copy of the file to play with it
myself.
--Jennifer
On Feb 8, 2011, at 12:05 PM, Ghan, Steven J wrote:
> No change.
>
>
> On 2/8/11 8:43 AM, "Jennifer Adams" <jma at COLA.IGES.ORG> wrote:
>
> Hmm. I think the problem may be that it doesn't like the Z axis
> metadata. What happens if you add 'ZDEF lev 30 linear 1 1' ?
> --Jennifer
>
>
> On Feb 8, 2011, at 11:18 AM, Ghan, Steven J wrote:
>
> Jennifer, thanks for your suggestion, but it makes no difference
> whether I declare it t or T. I had tried both.
>
> -Steve
>
>
> On 2/8/11 7:54 AM, "Jennifer Adams" <jma at COLA.IGES.ORG> wrote:
>
> The variable in the netcdf file is "T" so your variable declaration
> in t.ddf should be
> T=>t
> instead of
> t=>t
>
> --Jennifer
>
>
>
> On Feb 8, 2011, at 10:42 AM, Ghan, Steven J wrote:
>
> I am using Grads version 2.0.a7.1 to open a netcdf file with xdfopen:
>
> ga-> xdfopen t.ddf
> Scanning Descriptor File: t.ddf
> gadsdf: SDF file does not have any non-coordinate variables.
> SDF Descriptor file t.ddf was not successfully opened & parsed.
>
> Where
> t.ddf =
> dset ^mam3_aerocom2.cam2.h0.0001-0005.avg.nc
> TITLE AeroCom Present Day
> UNDEF 1.e36
> OPTIONS 365_day_calendar
> tdef time 1 linear jan2000 1mo
> VARS 1
> t=>t 30 99
> ENDVARS
>
> According to ncdump,
>
> netcdf mam3_aerocom2.cam2.h0.0001-0005.avg {
> dimensions:
> lat = 96 ;
> lon = 144 ;
> lev = 30 ;
> time = UNLIMITED ; // (1 currently)
> double lat(lat) ;
> lat:long_name = "latitude" ;
> lat:units = "degrees_north" ;
> double lon(lon) ;
> lon:long_name = "longitude" ;
> lon:units = "degrees_east" ;
> double lev(lev) ;
> lev:long_name = "hybrid level at midpoints (1000*(A+B))" ;
> lev:units = "level" ;
> lev:positive = "down" ;
> lev:standard_name =
> "atmosphere_hybrid_sigma_pressure_coordinate" ;
> lev:formula_terms = "a: hyam b: hybm p0: P0 ps: PS" ;
> double time(time) ;
> time:long_name = "time" ;
> time:units = "days since 0000-01-01 00:00:00" ;
> time:calendar = "noleap" ;
> time:bounds = "time_bnds" ;
> float T(time, lev, lat, lon) ;
> T:units = "K" ;
> T:long_name = "Temperature" ;
> T:cell_methods = "time: mean" ;
> // global attributes:
> :Conventions = "CF-1.0" ;
> :source = "CAM" ;
> :case = "mam3_aerocom2" ;
> }
> Interestingly, if I remove the
> VARS 1
> t=>t 30 99
> ENDVARS
> from t.ddf, I can open the netcdf file, but query tells me
> ga-> q file
> File 1 : AeroCom Present Day
> Descriptor: t.ddf
> Binary: mam3_aerocom2.cam2.h0.0001-0005.avg.nc
> Type = Gridded
> Xsize = 144 Ysize = 96 Zsize = 30 Tsize = 1 Esize = 1
> Number of Variables = 1
> 30 t,z,y,x Temperature
>
> The variable name is missing! So grads is unable to get the variable
> name. And of course I have no way of identifying the variable.
>
> The curious thing is that I was not having any such trouble until I
> produced a new batch of model history. I compared the ncdumps from
> the history that I could read with history that I could not, and
> found only trivial differences unrelated to variable names.
>
> Any suggestions out there regarding this puzzler?
>
> -Steve Ghan
>
> _________________________________
> Steven Ghan, PhD.
> FUNDAMENTAL & COMPUTATIONAL SCIENCES DIRECTORATE
> Atmospheric Sciences and Global Change Division
> Pacific Northwest National Laboratory
> 902 Battelle Boulevard
> P.O. Box 999, MSIN K9-24
> Richland, WA 99352 USA
> Tel: 509-372-6169
> Fax: 509-372-6168
> steve.ghan at pnl.gov
> http://www.pnl.gov/atmospheric/staff/staff_info.asp?staff_num=5663
>
>
>
>
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>
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org
>
>
>
>
>
>
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>
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org
>
>
>
>
>
>
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org
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