POM2K Model Running

Procedure

Use PuTTY to log in to the server as the root user.
Run the following command to switch to the POM installation directory:
```
cd /path/to/POM/POM2K
```
Run the following command to decompress the POM2K installation package:
```
unzip POM2K.zip
```
Run the following command to switch to the directory generated after the package is decompressed:
```
cd POM2K
```
Run the following commands to modify the pom2k.f file:
1. Open pom2k.f.
```
vi pom2k.f
```
2. Press i to enter the insert mode and change mode 1 to mode 3.
  Before the modification:
```
iproblem=1
```
  After the modification:
```
iproblem=3
```
3. Press Esc, type :wq!, and press Enter to save the file and exit.
Run the following command to copy the header file gridcom of the installation package:
```
cp /path/to/POM/GRID-DATA/IC/include/gridcom ./
```

Run the following commands to modify the runpom2k file:

Open runpom2k.
```
vi runpom2k
```

Press i to enter the insert mode and change mode 1 to mode 3.

Before the modification:

#
# Runscript for pom2k with example of reading IC from file.
#  IC file generated by /GRID-DATA/GRID.f     (T.E. Dec04)
#
# Note: if "grid" not created here you can put it in pom2k.c
#       "params" replaces default values set in pom2k.f
#
#
# ------------------ PARAMETER FILES FOR EACH CASE -----------
#
# -- SEAMOUNT TEST CASE (initial cond. calc. in pom2k.f)
#
 echo '      parameter(im=65, jm=49, kb=21)' >  grid
 echo '      iproblem=  1                  ' >  params
 echo '      days=      0.025              ' >> params
 echo '      prtd1=     0.0125             ' >> params
 echo '      dte=       6.                 ' >> params
#
# -- COAST TEST CASE (initial cond. from file)
#
#echo '      parameter(im=41, jm=61, kb=16)' >  grid
#echo '      iproblem=  3                  ' >  params
#echo '      days=      0.50               ' >> params
#echo '      prtd1=     0.25               ' >> params
#echo '      dte=      12.                 ' >> params
#cp IC.dat fort.40            # Initial Condition file
#
# ------------------ COMPILE & RUN ----------------------------
#
# g77 -O3 pom2k.f /usr/local/lib/libnetcdf.a
# ---- now netCDF output not used (see "CDF" in pom2k.f)
  gfortran -O3 pom2k.f
# f90 -O3 pom2k.f  # or any other compiler you wish to use
#
# ------------------ OUTPUT FILES -----------------------------
#
a.out > pom2k.out        # printout file
#
#       pom2k.nc         # netCDF file for MATLAB plotting

After the modification:

#
# Runscript for pom2k with example of reading IC from file.
#  IC file generated by /GRID-DATA/GRID.f     (T.E. Dec04)
#
# Note: if "grid" not created here you can put it in pom2k.c
#       "params" replaces default values set in pom2k.f
#
#
# ------------------ PARAMETER FILES FOR EACH CASE -----------
#
# -- SEAMOUNT TEST CASE (initial cond. calc. in pom2k.f)
#
# echo '      parameter(im=65, jm=49, kb=21)' >  grid
# echo '      iproblem=  1                  ' >  params
# echo '      days=      0.025              ' >> params
# echo '      prtd1=     0.0125             ' >> params
# echo '      dte=       6.                 ' >> params
#
# -- COAST TEST CASE (initial cond. from file)
#
echo '      parameter(im=41, jm=61, kb=16)' >  grid
echo '      iproblem=  3                  ' >  params
echo '      days=      0.50               ' >> params
echo '      prtd1=     0.25               ' >> params
echo '      dte=      12.                 ' >> params
cp IC.dat fort.40            # Initial Condition file
#
# ------------------ COMPILE & RUN ----------------------------
#
# g77 -O3 pom2k.f /usr/local/lib/libnetcdf.a
# ---- now netCDF output not used (see "CDF" in pom2k.f)
  gfortran -O3 pom2k.f /path/to/NETCDF/netcdf-4.4.1.1/lib/libnetcdf.a -I/path/to/NETCDF/netcdf-4.4.1.1/include
# f90 -O3 pom2k.f  # or any other compiler you wish to use
#
# ------------------ OUTPUT FILES -----------------------------
#
./a.out > pom2k.out        # printout file
#
#       pom2k.nc         # netCDF file for MATLAB plotting

Press Esc, type :wq!, and press Enter to save the file and exit.

Run the following commands to grant the permissions to runpom2k and execute it:
```
chmod 755 runpom2k
./runpom2k
```
The following is an example of the command output.
Figure 1 Result example

After the command is executed, the fort.71 file is generated in the current directory. This file is the required NC file.

Parent topic: POM POM2K Porting Guide (CentOS 7.6)