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NCEP/NCAR Reanalysis > NCAR USERSGo to Dataset: If you are interested in CCM2 history format, take a look at NCAR CGD Reanalysis Data (in CCM2 history format)
The NCEP/NCAR reanalysis data has several formats. At this time, we have programs to decode GRIB format only. To use this dataset, you need
For example, to get 'grb3d85010112' from A00001 on the MSS, you need to
| Step | Command | |
|---|---|---|
| 1 | cd /ptmp/your-user-name | |
| 2 | msread A00001 /DSS/A00001 | msread -fBI A00001 /DSS/A00001 |
| 3 | cosconvert -b A00001 | |
| 4 | tar xvf A00001 ./grb3d85010112 | |
If you transfer the binary MSS vsn back to your local computer system, you need to specify a block size of 32768 octets in the `untar' command. For example, if one block is 512 octets on your sysetm, to untar and extract grb3d85010112 file,
| tar xbf 64 A00001 ./grb3d85010112 |
The extracted 'grb3d85010112' file is a GRIB file. You can use our GRIB decoder to decode the data. However, if you are not familiar with GRIB format, take a look at the GRIB document. You need to know how NCEP reanalysis grib.tbl2 and NCEP reanalysis grib.tbl3 are used.
To access and read Reanalysis data on NCAR's computers, an example program, selGRIB.aix_csh, is available on line.
If you plan to convert the GRIB format data into netcdf format, NCL is a tool that is available on many different platforms.
If you are a GrADS user, you can use GrADS to display the GRIB file directly with correct control and map files. To use GrADS to display the data, you need all three files. The following examples are available in ds090.0/data/sampledata/grads:
Also seeDSS Documentation
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| Updated 31 July 2006 |
