[gradsusr] netCDF control file
Huddleston, John
Huddleston at cira.colostate.edu
Mon Nov 8 11:58:23 EST 2010
Thank you Heiner,
I have been building the Cygwin version of GrADS since v2.0a5. I try to use the most current netCDF library.
Just wanted to make sure all is well with that platform variant.
John
John Huddleston, PhD
Cooperative Institute for Research in the Atmosphere
From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Heiner Körnich
Sent: Monday, November 08, 2010 9:03 AM
To: GrADS Users Forum
Subject: Re: [gradsusr] netCDF control file
Hi John,
the platform is:
file /bin/bash
/bin/bash: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped
My testfile comes from the CERA database, which went twice through CDO. When opening it with Grads v2.0.a4 it gives:
Config: v2.0.a4 little-endian readline printim grib2 netcdf hdf4-sds
Issue 'q config' command for more information.
Landscape mode? ('n' for portrait):
GX Package Initialization: Size = 11 8.5
ga-> sdfopen mpi-olr-ltm.nc<http://mpi-olr-ltm.nc>
Scanning self-describing file: mpi-olr-ltm.nc<http://mpi-olr-ltm.nc>
SDF file has no discernable time coordinate -- using default values.
SDF file mpi-olr-ltm.nc<http://mpi-olr-ltm.nc> is open as file 1
LON set to 0 360
LAT set to -88.572 88.572
LEV set to 0 0
Time values set: 1:1:1:0 1:1:1:0
E set to 1 1
ga-> d rlut
gancgrid error: nc_get_vara_double failed; NetCDF: Index exceeds dimension bound
Data Request Error: Error for variable 'rlut'
Error ocurred at column 1
DISPLAY error: Invalid expression
Expression = rlut
I don't understand the netcdf-version question, but here is the ncdump -h output:
ncdump -h mpi-olr-ltm.nc<http://mpi-olr-ltm.nc>
netcdf mpi-olr-ltm {
dimensions:
lon = 192 ;
nv = 2 ;
lat = 96 ;
time = UNLIMITED ; // (12 currently)
variables:
double lon(lon) ;
lon:long_name = "longitude" ;
lon:units = "degrees_east" ;
lon:standard_name = "longitude" ;
lon:bounds = "lon_bounds" ;
double lon_bounds(lon, nv) ;
double lat(lat) ;
lat:long_name = "latitude" ;
lat:units = "degrees_north" ;
lat:standard_name = "latitude" ;
lat:bounds = "lat_bounds" ;
double lat_bounds(lat, nv) ;
double time(time) ;
time:units = "day as %Y%m%d.%f" ;
float rlut(time, lat, lon) ;
rlut:long_name = "Outgoing Longwave Radiation" ;
rlut:standard_name = "toa_outgoing_longwave_flux" ;
rlut:units = "W m-2" ;
rlut:grid_type = "gaussian" ;
rlut:cell_methods = "time: mean (interval: 12 minutes)" ;
rlut:original_name = "TRAD0" ;
// global attributes:
:CDI = "Climate Data Interface version 1.2.1" ;
:Conventions = "CF-1.0" ;
:history = "Fri May 15 10:19:53 2009: cdo ymonmean mpi-test.nc<http://mpi-test.nc> mpi-olr-ltm.nc<http://mpi-olr-ltm.nc>\n",
"Fri May 15 10:19:39 2009: cdo selyear,1979/1995 pcmdi.ipcc4.mpi_echam5.20c3m.run1.monthly.rlut_A1.nc<http://pcmdi.ipcc4.mpi_echam5.20c3m.run1.monthly.rlut_A1.nc> mpi-test.nc<http://mpi-test.nc>\n",
"Output from CERA Database, processed with cdo, PINGO, CMOR At 10:19:52 on 01/20/2005, CMOR rewrote data to comply with CF standards and IPCC Fourth Assessment requirements" ;
:institution = "MPI (Max Planck Institute for Meteorology,Hamburg, Germany)" ;
:title = "MPI model output prepared for IPCC Fourth Assessment climate of the 20th Century experiment (20C3M)" ;
:contact = "Joerg Wegner (wegner at dkrz.de<mailto:wegner at dkrz.de>)" ;
:project_id = "IPCC Fourth Assessment" ;
:table_id = "Table A1 (8 October 2004)" ;
:experiment_id = "climate of the 20th Century experiment (20C3M)" ;
:realization = 1 ;
:cmor_version = 0.959999978542328 ;
:references = "ECHAM5: E. Roeckner et. all, 2003,The atmospheric general circulation model ECHAM5Report No. 349OM: Marsland et. all, 2003,The Max-Planck-Institute global ocean/sea ice modelwith orthogonal curvelinear coordinatesOcean Modell., 5, 91-127.OM<http://91-127.OM>: Haak, H. et. all, 2003:Formation and propagation of great salinity anomalies,Geophys. Res. Lett., 30 , 1473,10.1029/2003GL17065." ;
:comment = "anthropogenic forcing only" ;
:CDO = "Climate Data Operators version 1.2.1 (http://www.mpimet.mpg.de/cdo)" ;
}
Kind regards,
Heiner
On Mon, Nov 8, 2010 at 4:27 PM, Huddleston, John <Huddleston at cira.colostate.edu<mailto:Huddleston at cira.colostate.edu>> wrote:
Hi Heiner,
Which platform of GrADS 2.x does not open netCDF "older" files? What is the version of the netCDF file that it cannot open?
John Huddleston, PhD
Cooperative Institute for Research in the Atmosphere
From: gradsusr-bounces at gradsusr.org<mailto:gradsusr-bounces at gradsusr.org> [mailto:gradsusr-bounces at gradsusr.org<mailto:gradsusr-bounces at gradsusr.org>] On Behalf Of Heiner Körnich
Sent: Monday, November 08, 2010 6:06 AM
To: GrADS Users Forum
Subject: Re: [gradsusr] netCDF control file
Hi Deniz,
you don't nead a ctl-file to open a netcdf-file in grads. If your file follows the COARDS-standard, then you can open it with 'sdfopen ures.nc<http://ures.nc>'. If grads won't recognise it, you might want to try an older grads-version. We had some problems here with grads 2.0 and netcdf.
If grads still won't open your file, you can write a ctl-file and try to open that with the command 'xdfopen'. The ctl-file looks a bit different from standard ctl-files, look here:
http://www.iges.org/grads/gadoc/gradcomdxdfopen.html
Then, you would need the output from ncdump in order to know what is inside the netcdf-file. Alternatively you can use the climate data operators (CDO) with the command "cdo sinfo ures.nc<http://ures.nc>".
Or in matlab, if you have the mexnc-package installed, you read the information with
info=nc_info('ures.nc<http://ures.nc>')
Then you can access all details in info.
Finally, if it is only you who will use the data, it might be simpler to write binary output in matlab and use a standard ctl.
Kind regards from Stockholm,
Heiner
On Mon, Nov 8, 2010 at 10:11 AM, Deniz Demirhan Bari <bari at iap-kborn.de<mailto:bari at iap-kborn.de>> wrote:
Dear Grads users,
I have calculated residual wind components in MATLAB and saved them in netCDF file. Now I want to read them in grads but I cannot create a netcdf control file.
I tried to get the output of ncdump but my computer doesn't recognize ncdump although I installed it.
I am using the latest version of Grads on a Suse Linux computer.
My attempt to create a ctl file is below:
*
DSET ^ures.nc<http://ures.nc>
DTYPE netCDF
XDEF 96 LINEAR 0.000000 3.750000
YDEF 48 LEVELS -87.159 -83.479 -79.777 -76.070 -72.362 -68.652
-64.942 -61.232 -57.521 -53.810 -50.099 -46.389
-42.678 -38.967 -35.256 -31.545 -27.833 -24.122
-20.411 -16.700 -12.989 -9.278 -5.567 -1.856
1.856 5.567 9.278 12.989 16.700 20.411
24.122 27.833 31.545 35.256 38.967 42.678
46.389 50.099 53.810 57.521 61.232 64.942
68.652 72.362 76.070 79.777 83.479 87.159
ZDEF 114 LINEAR 1 1
TDEF 1 LINEAR 00:00Z00jan0000 1mn
OPTIONS yrev
UNDEF -9e+33
VARS 1
ures 114 1,100 ures
ENDVARS
*
Thanks in advance
Deniz DEMIRHAN BARI
Leibniz-Institut für Atmosphärenphysik e.V.
an der Universität Rostock
Schlossstraße 6
18225 Kühlungsborn
_______________________________________________
gradsusr mailing list
gradsusr at gradsusr.org<mailto:gradsusr at gradsusr.org>
http://gradsusr.org/mailman/listinfo/gradsusr
--
Heiner Körnich
Dept. of Meteorology Tel: +46 8 164333
Stockholms University, SE-106 91 Stockholm, Sweden
Email: heiner at misu.su.se<mailto:heiner at misu.su.se> www.misu.su.se/~heiner/<http://www.misu.su.se/%7Eheiner/>
_______________________________________________
gradsusr mailing list
gradsusr at gradsusr.org<mailto:gradsusr at gradsusr.org>
http://gradsusr.org/mailman/listinfo/gradsusr
--
Heiner Körnich
Dept. of Meteorology Tel: +46 8 164333
Stockholms University, SE-106 91 Stockholm, Sweden
Email: heiner at misu.su.se<mailto:heiner at misu.su.se> www.misu.su.se/~heiner/<http://www.misu.su.se/~heiner/>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20101108/e3b1c109/attachment-0001.html
More information about the gradsusr
mailing list