[gradsusr] Grid Dimensions CCSM3 TOS Variable

Dustin Pittman dpittman at atmos.ucla.edu
Tue Apr 19 11:16:12 EDT 2011


I am having problems defining the ydef for the tos variable with the ocean
CCSM model. I have tried defining explicitly for all y levels and also with
various definitions of the gaussian grid according the the grads site. Below
is the relavent portions of the ncdump file from the netcdf file. Below that
is the concatenated ydef latitudes. I am using GrADS 2.0.a8 on a Mac OS X
10.6.7.

netcdf tos_O_MO_pmip2_0k_oa_CCSM-mocat-0050 {
dimensions:
lon = 320 ;
lat = 395 ;
 bnds = 2 ;
time = UNLIMITED ; // (600 currently)
variables:
double lon_bnds(lon, bnds) ;
 double lat_bnds(lat, bnds) ;
double time_bnds(time, bnds) ;
double time(time) ;
 time:bounds = "time_bnds" ;
time:units = "days since 0000-1-1" ;
time:axis = "T" ;
 time:standard_name = "time" ;
time:calendar = "noleap" ;
double lat(lat) ;
 lat:long_name = "Latitude" ;
lat:units = "degrees_north" ;
lat:axis = "Y" ;
 lat:standard_name = "latitude" ;
lat:bounds = "lat_bnds" ;
lat:_FillValue = -9999. ;
 double lon(lon) ;
lon:long_name = "Longitude" ;
lon:units = "degrees_east" ;
 lon:axis = "X" ;
lon:standard_name = "longitude" ;
lon:bounds = "lon_bnds" ;
 lon:_FillValue = -9999. ;
float tos(time, lat, lon) ;
tos:comment = "Created using NCL code CCSM_ocnm_2cfPMIP.ncl on\n",
 " machine tempest" ;
tos:missing_value = 1.e+20f ;
tos:long_name = "sea_surface_temperature" ;
 tos:cell_methods = "time: mean (interval: 1 month)" ;
tos:history = "Interpolated to regular grid from dipole grid,\n",
 "TEMP+273.15" ;
tos:units = "K" ;
tos:original_units = "C" ;
 tos:original_name = "TEMP" ;
tos:standard_name = "sea_surface_temperature" ;
tos:_FillValue = 1.e+20f ;

// global attributes:
:table_id = "Table O1" ;
:title = "model output prepared for PMIP2" ;
 :institution = "NCAR (National Center for Atmospheric \n",
"Research, Boulder, CO, USA)" ;
 :source = "CCSM3.0, version beta14 (2004): \n",
"atmosphere: CAM3.0, T42L18;\n",
 "ocean     : POP1.4.3 (modified), gx1v3\n",
"sea ice   : CSIM5.0, gx1v3;\n",
"land      : CLM3.0, T42" ;
 :contact = "ottobli at ucar.edu" ;
:project_id = "PMIP 2" ;
 :Conventions = "CF-1.0" ;
:references = "Otto-Bliesner, B.L., et al., 2005:\n",
" Climate Sensitivity of Moderate and Low Resolution \n",
 " Versions of CCSM3 to Preindustrial Forcings\n",
" Journal of Climate\n",
" \n",
 " Main website: http://www.ccsm.ucar.edu" ;
:acknowledgment = " Any use of CCSM data should acknowledge the
contribution\n",

ydef latitudes: -79.4876251220703 -78.9534149169922
-78.9534149169922...89.9524383544922
89.9524383544922 90



-- 
Dustin E. Pittman
1st Year Graduate Student
University of California, Los Angeles
Department of Atmospheric and Oceanic Sciences
574.248.1016
dpittman at atmos.ucla.edu <dpittman at ucla.edu>
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