[gradsusr] Help with CMIP5 sea ice control file

[Joyce Meyerson]

Dear GrADS user group,

Can someone help me create a control file for CMIP5 CCSM4 sea ice? I understand that I have to make a PDEF declaration but for the life of me I don't know how. I saw a promising post from 1/4/13 from Jennifer Adams titled "CMIP5 and GrADS" but no follow-up. 

Thanks in advance.
Joyce

netcdf sic_OImon_CCSM4_historical_r1i1p1_185001-200512 {
dimensions:
        time = UNLIMITED ; // (1872 currently)
        j = 384 ;
        i = 320 ;
        bnds = 2 ;
        vertices = 4 ;
variables:
        double time(time) ;
                time:bounds = "time_bnds" ;
                time:units = "days since 0000-01-01 00:00:00" ;
                time:calendar = "noleap" ;
                time:axis = "T" ;
                time:long_name = "time" ;
                time:standard_name = "time" ;
        double time_bnds(time, bnds) ;
        int j(j) ;
                j:units = "1" ;
                j:long_name = "cell index along second dimension" ;
        int i(i) ;
                i:units = "1" ;
                i:long_name = "cell index along first dimension" ;
        float lat(j, i) ;
                lat:standard_name = "latitude" ;
                lat:long_name = "latitude coordinate" ;
                lat:units = "degrees_north" ;
                lat:bounds = "lat_vertices" ;
        float lon(j, i) ;
                lon:standard_name = "longitude" ;
                lon:long_name = "longitude coordinate" ;
                lon:units = "degrees_east" ;
                lon:bounds = "lon_vertices" ;
        float lat_vertices(j, i, vertices) ;
                lat_vertices:units = "degrees_north" ;
        float lon_vertices(j, i, vertices) ;
                lon_vertices:units = "degrees_east" ;
        float sic(time, j, i) ;
                sic:standard_name = "sea_ice_area_fraction" ;
                sic:long_name = "Sea Ice Area Fraction" ;
                sic:comment = "aice, CMIP5_table_comment: fraction of grid cell covered by sea ice." ;
                sic:units = "%" ;
                sic:original_name = "aice" ;
                sic:cell_methods = "time: mean (interval: 30 days)" ;
                sic:cell_measures = "area: areacello" ;
                sic:history = "2011-10-31T14:37:55Z altered by CMOR: replaced missing value flag (1e+30) with standard missing value (1e+20)." ;
                sic:missing_value = 1.e+20f ;
                sic:_FillValue = 1.e+20f ;
                sic:associated_files = "baseURL: http://cmip-pcmdi.llnl.gov/CMIP5/dataLocation gridspecFile: gridspec_seaIce_fx_CCSM4_historical_r0i0p0.nc areacello: a
reacello_fx_CCSM4_historical_r0i0p0.nc" ;
                sic:coordinates = "lat lon" ;

// global attributes:
                :institution = "NCAR (National Center for Atmospheric Research) Boulder, CO, USA" ;
.
.
.

*********************

**************************
Joyce Meyerson
UCLA
Dept. of Oceanic & Atmospheric Sciences
7235 Math Science Bld.
Los Angeles, CA 90095-1565
hobo at atmos.ucla.edu

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