Install your own WPS

Updated: 10 July 2023

A variant of WRF must be compiled prior to WPS.
(WPS of the same major version as WRF is recommended.)

1. Load required modules and set environment variables

Specify the path of your local WRF directory, i.e., WRF_DIR.

module purge
module load cpeIntel/23.03
module load cray-hdf5-parallel
module load cray-netcdf-hdf5parallel
module load cray-parallel-netcdf
module load libpng/1.6.37-cpeIntel-23.03
module load JasPer/1.900.1-cpeIntel-23.03

export WRF_DIR=../WRF        # Path to WRF directory *** {USER EDIT} *** 

export NETCDF=${CRAY_NETCDF_HDF5PARALLEL_PREFIX}
export NETCDFPAR=${CRAY_NETCDF_HDF5PARALLEL_PREFIX}    
export PNETCDF=${CRAY_PARALLEL_NETCDF_PREFIX}           
export HDF5=${CRAY_HDF5_PARALLEL_PREFIX}
export JASPERINC=${EBROOTJASPER}/include              # (Optional)
export JASPERLIB=${EBROOTJASPER}/lib                  # (Optional)

### Common mistake :: insert spaces before or after =

2. Download WPS source code

wget https://github.com/wrf-model/WPS/archive/refs/tags/v4.5.tar.gz
tar xzf v4.5.tar.gz
mv WPS-4.5 WPS

For older version, check the WPS stable branches and releases on the GitHub repository and its official website.

3. Run ./configure

cd WPS
./configure
# Type 39, then press Enter <-- Cray XC CLE/Linux x86_64, Intel compiler   (dmpar)

4.3 Edit configure.wps

Open ./configure.wps using a text editor such as vi
- Add -L/lustrefs/disk/modules/easybuild/software/libpng/1.6.37-cpeIntel-23.03/lib to COMPRESSION_LIBS (between -ljasper and -lpng) [-L$EBROOTLIBPNG/lib]
- Append -Wno-implicit-function-declaration -Wno-implicit-int to cc.

vi configure.wps
# Change COMPRESSION_LIBS = ... -ljasper -lpng -lz
#   to   COMPRESSION_LIBS = ... -ljasper -L/lustrefs/disk/modules/easybuild/software/libpng/1.6.37-cpeIntel-23.03/lib -lpng -lz
# Change SCC = cc
#   to   SCC = cc -Wno-implicit-function-declaration -Wno-implicit-int

If WRF was compiled with sm+dm option, append -qopenmp to WRF_LIB.

5. Compile WPS

./compile 2>&1 | tee compile.wps.log

6. Check

ls -ls ./*.exe             
# Check if geogrid.exe, metgrid.exe and ungrib.exe are present

ls -ls ./util/*.exe             
# Check if avg_tsfc.exe, calc_ecmwf_p.exe, g1print.exe, g2print.exe, 
# height_ukmo.exe, int2nc.exe, mod_levs.exe and rd_intermediate.exe are present

ls -ls ./util/*.ncl
# Check if gfs.ncl, plotfmt.ncl, plotfmt_nc.ncl and plotgrids.ncl are present

7. Example Job submission script

#!/bin/bash
#SBATCH -p compute              # Partition
#SBATCH -N 1                    # Number of nodes
#SBATCH --ntasks-per-node=16   # Number of MPI processes per node
#SBATCH -t 5-00:00:00           # Job runtime limit
#SBATCH -J WPS                  # Job name
#SBATCH -A ltxxxxxx             # Account *** {USER EDIT} ***

module purge
module load cpeIntel/23.03
module load cray-hdf5-parallel
module load cray-netcdf-hdf5parallel
module load cray-parallel-netcdf
module load libpng/1.6.37-cpeIntel-23.03
module load JasPer/1.900.1-cpeIntel-23.03
module load flex/2.6.4

export OMP_NUM_THREADS=1

ulimit -s unlimited

srun -n16 ./geogrid.exe
srun -N1 -n1 ./ungrib.exe
srun -n16 ./metgrid.exe

#srun -n16 ./real.exe
#srun ./wrf.exe

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