Dear Arlindo,<br>I'm working with all the CMIP3 GCM output and I faced the same problem with many others models.<br>I found 2 manners to cope with it:<br>1) It is possible to open with a old version of Grads (grads-1.9b4).<br>
2) to trasform these data to Grb by CDO.<br>Thanks,<br>Roger<br><br><div class="gmail_quote">2010/9/30 Arlindo Meque <span dir="ltr"><<a href="mailto:mequitomz@yahoo.com.br">mequitomz@yahoo.com.br</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Dear GrADS users,<br>
<br>
<br>
1. I have downloaded a GFDL model output from the PCMDI<br>
(<a href="http://www-pcmdi.llnl.gov/" target="_blank">http://www-pcmdi.llnl.gov/</a>).<br>
<br>
<br>
<br>
2. I tried to open the file in GrADS and got the following error message:<br>
ga-> sdfopen<br>
<a href="http://pcmdi.ipcc4.gfdl_cm2_1.sresa2.run1.monthly.pr_A1.200101-210012.nc" target="_blank">pcmdi.ipcc4.gfdl_cm2_1.sresa2.run1.monthly.pr_A1.200101-210012.nc</a><br>
Scanning self-describing file:<br>
<a href="http://pcmdi.ipcc4.gfdl_cm2_1.sresa2.run1.monthly.pr_A1.200101-210012.nc" target="_blank">pcmdi.ipcc4.gfdl_cm2_1.sresa2.run1.monthly.pr_A1.200101-210012.nc</a><br>
SDF Error: 365 day calendars are no longer supported by<br>
sdfopen.<br>
To open this file with GrADS, use a descriptor file with<br>
a complete TDEF entry and OPTIONS 365_day_calendar.<br>
Documentation is at<br>
<a href="http://iges.org/grads/gadoc/SDFdescriptorfile.html" target="_blank">http://iges.org/grads/gadoc/SDFdescriptorfile.html</a><br>
ga-><br>
<br>
<br>
3. I’m now trying to write the descriptor file but not sure about the <br>
XDEF, YDEF, ZDEF, TDEF an EDEF options<br>
<br>
4. This is the output from the “ncdump -h” commmand:<br>
<br>
dimensions:<br>
lon = 144 ;<br>
lat = 90 ;<br>
time = UNLIMITED ; // (1200 currently)<br>
bnds = 2 ;<br>
variables:<br>
double lon(lon) ;<br>
lon:standard_name = "longitude" ;<br>
lon:long_name = "longitude" ;<br>
lon:units = "degrees_east" ;<br>
lon:axis = "X" ;<br>
lon:bounds = "lon_bnds" ;<br>
double lon_bnds(lon, bnds) ;<br>
double lat(lat) ;<br>
lat:standard_name = "latitude" ;<br>
lat:long_name = "latitude" ;<br>
lat:units = "degrees_north" ;<br>
lat:axis = "Y" ;<br>
lat:bounds = "lat_bnds" ;<br>
double lat_bnds(lat, bnds) ;<br>
double time(time) ;<br>
time:standard_name = "time" ;<br>
time:long_name = "time" ;<br>
time:units = "days since 2001-01-01<br>
00:00:00smelt\',\'u_ref\',\'v_ref\',\'swdn_toa\'," ;<br>
time:axis = "T" ;<br>
time:calendar = "noleap" ;<br>
time:bounds = "time_bnds" ;<br>
double time_bnds(time, bnds) ;<br>
float pr(time, lat, lon) ;<br>
pr:standard_name = "precipitation_flux" ;<br>
pr:long_name = "Precipitation" ;<br>
pr:units = "kg m-2 s-1" ;<br>
pr:cell_methods = "time: mean" ;<br>
pr:original_name = "precip" ;<br>
pr:comment = "includes all types (rain, snow, large-scale,<br>
convective, etc.)" ;<br>
<br>
// global attributes:<br>
:title = "GFDL CM2.1, SRESA2 (run1) SRES A2 experiment<br>
output for IPCC AR4 and US CCSP" ;<br>
:institution = "NOAA GFDL (US Dept of Commerce / NOAA /<br>
Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA)"<br>
;<br>
:source = "GFDL_CM2.1 (2004): atmosphere: AM2.1 (am2p13fv,<br>
M45L24); ocean: OM3.1 (mom4p1p7_om3p5, tripolar360x200L50);<br>
sea ice: SIS; land: LM2; infrastructure: FMS preK release" ;<br>
:contact = "<a href="http://GFDL.Climate.Model.Info" target="_blank">GFDL.Climate.Model.Info</a>@<a href="http://noaa.gov" target="_blank">noaa.gov</a>" ;<br>
:project_id = "IPCC Fourth Assessment and US CCSP<br>
Projects" ;<br>
:table_id = "Table A1 (20 September 2004)" ;<br>
:experiment_id = "SRES A2 experiment" ;<br>
:realization = 1 ;<br>
:cmor_version = 0.96f ;<br>
:Conventions = "CF-1.0" ;<br>
:history = "input/<a href="http://atmos.200101-210012.precip.nc" target="_blank">atmos.200101-210012.precip.nc</a> At<br>
10:21:27 on 01/28/2005, CMOR rewrote data to comply with CF<br>
standards and IPCC Fourth Assessment and US CCSP Projects<br>
requirements" ;<br>
<br>
<br>
<br>
1. help is need<br>
<br>
<br>
Arlindo<br>
<br>
<br>
<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Roger Rodrigues Torres<br>Ph.D. Student<br>National Institute for Space Research (INPE)<br>Center for Weather Forecast and Climate Studies (CPTEC)<br>Phone: 55 12 3186-9541<br>
Personal Webpage: <a href="http://rtorres.webnode.com.br">http://rtorres.webnode.com.br</a><br>