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nco website  

NCO manipulates data stored in netCDF format. It also exploits the geophysical expressivity of many CF (Climate & Forecast) metadata conventions, the flexible description of physical dimensions translated by UDUnits, the network transparency of OPeNDAP, the storage features (e.g., compression, chunking, groups) of HDF (the Hierarchical Data Format), and many powerful mathematical and statistical algorithms of GSL (the GNU Scientific Library). NCO is fast, powerful, and free.

Required Modules

modules documentation


  • nco

System Variables

  • HPC_NCO_DIR - installation directory
  • HPC_NCO_BIN - executable binary directory
  • HPC_NCO_LIB - library directory
  • HPC_NCO_INC - include directory


See the NCO_4.2 page for nco configuration details.


See the NCO_Install page for nco installation notes.


If you publish research that uses nco, you may cite it as follows:

Rew, R. K. and G. P. Davis, "NetCDF: An Interface for Scientific Data Access," IEEE Computer Graphics and Applications, Vol. 10, No. 4, pp. 76-82, July 1990.

Brown, S. A, M. Folk, G. Goucher, and R. Rew, "Software for Portable Scientific Data Management," Computers in Physics, American Institute of Physics, Vol. 7, No. 3, May/June 1993, pp. 304-308.