NCL is a scripting language used to generate visual output files using data generated by WRF.
NOTE: This guide assumes you are using the BASH shell.
STEP ONE - Files
From your home directory create and enter a new directory called ncl.
In the ncl folder download the latest version of the NCL binaries. They can be found here.
Make sure to get the correct version of the binaries for the linux version and compiler version being used.
In our example we will be downloading and extracting version 6.4.0 for Redhat and the GNU compiler using the following commands:
wget https://www.earthsystemgrid.org/dataset/ncl.640.nodap/file/ncl_ncarg-6.4.0-RHEL6.4_64bit_nodap_gnu447.tar.gz tar -xf ncl_ncarg-6.4.0-RHEL6.4_64bit_nodap_gnu447.tar.gzSTEP TWO - Environment Variables
Once you have everything downloaded and extracted you will need to setup the correct environment variables for NCL using the following commands:
export NCARG_ROOT=$HOME/ncl export PATH=$NCARG_ROOT/bin:$PATHOnce this is complete the NCL scripting language is ready to be used.
Note: The environment variables will be reset each time you log out.
STEP THREE - Example Scripts
NCAR has many example scripts on their website https://www.ncl.ucar.edu/Applications/