[gradsusr] Problem reading Netcdf file from the GFDL model output

[Roger Rodrigues Torres]

Dear Arlindo,
I'm working with all the CMIP3 GCM output and I faced the same problem with
many others models.
I found 2 manners to cope with it:
1) It is possible to open with a old version of Grads (grads-1.9b4).
2) to trasform these data to Grb by CDO.
Thanks,
Roger

2010/9/30 Arlindo Meque <mequitomz at yahoo.com.br>

> Dear GrADS users,
>
>
> 1. I have downloaded a GFDL model output from the PCMDI
> (http://www-pcmdi.llnl.gov/).
>
>
>
> 2. I tried to open the file in GrADS and got the following error message:
> ga-> sdfopen
> pcmdi.ipcc4.gfdl_cm2_1.sresa2.run1.monthly.pr_A1.200101-210012.nc
> Scanning self-describing file:
> pcmdi.ipcc4.gfdl_cm2_1.sresa2.run1.monthly.pr_A1.200101-210012.nc
> SDF Error: 365 day calendars are no longer supported by
> sdfopen.
> To open this file with GrADS, use a descriptor file with
> a complete TDEF entry and OPTIONS 365_day_calendar.
> Documentation is at
> http://iges.org/grads/gadoc/SDFdescriptorfile.html
> ga->
>
>
> 3.       I’m now trying to write the descriptor file  but  not sure about
> the
> XDEF, YDEF, ZDEF, TDEF an EDEF options
>
> 4.       This is the output from the “ncdump -h” commmand:
>
> dimensions:
> lon = 144 ;
> lat = 90 ;
> time = UNLIMITED ; // (1200 currently)
> bnds = 2 ;
> variables:
> double lon(lon) ;
> lon:standard_name = "longitude" ;
> lon:long_name = "longitude" ;
> lon:units = "degrees_east" ;
> lon:axis = "X" ;
> lon:bounds = "lon_bnds" ;
> double lon_bnds(lon, bnds) ;
> double lat(lat) ;
> lat:standard_name = "latitude" ;
> lat:long_name = "latitude" ;
> lat:units = "degrees_north" ;
> lat:axis = "Y" ;
> lat:bounds = "lat_bnds" ;
> double lat_bnds(lat, bnds) ;
> double time(time) ;
> time:standard_name = "time" ;
> time:long_name = "time" ;
> time:units = "days since 2001-01-01
> 00:00:00smelt\',\'u_ref\',\'v_ref\',\'swdn_toa\'," ;
> time:axis = "T" ;
> time:calendar = "noleap" ;
> time:bounds = "time_bnds" ;
> double time_bnds(time, bnds) ;
> float pr(time, lat, lon) ;
> pr:standard_name = "precipitation_flux" ;
> pr:long_name = "Precipitation" ;
> pr:units = "kg m-2 s-1" ;
> pr:cell_methods = "time: mean" ;
> pr:original_name = "precip" ;
> pr:comment = "includes all types (rain, snow, large-scale,
> convective, etc.)" ;
>
> // global attributes:
> :title = "GFDL CM2.1, SRESA2 (run1) SRES A2 experiment
> output for IPCC AR4 and US CCSP" ;
> :institution = "NOAA GFDL (US Dept of Commerce / NOAA /
> Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA)"
> ;
> :source = "GFDL_CM2.1 (2004): atmosphere: AM2.1 (am2p13fv,
> M45L24); ocean: OM3.1 (mom4p1p7_om3p5, tripolar360x200L50);
> sea ice: SIS; land: LM2; infrastructure: FMS preK release" ;
> :contact = "GFDL.Climate.Model.Info at noaa.gov" ;
> :project_id = "IPCC Fourth Assessment and US CCSP
> Projects" ;
> :table_id = "Table A1 (20 September 2004)" ;
> :experiment_id = "SRES A2 experiment" ;
> :realization = 1 ;
> :cmor_version = 0.96f ;
> :Conventions = "CF-1.0" ;
> :history = "input/atmos.200101-210012.precip.nc At
> 10:21:27 on 01/28/2005, CMOR rewrote data to comply with CF
> standards and IPCC Fourth Assessment and US CCSP Projects
> requirements" ;
>
>
>
>        1. help is need
>
>
> Arlindo
>
>
>
>
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>



-- 
Roger Rodrigues Torres
Ph.D. Student
National Institute for Space Research (INPE)
Center for Weather Forecast and Climate Studies (CPTEC)
Phone: 55 12 3186-9541
Personal Webpage: http://rtorres.webnode.com.br
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