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 # WRF-CTSM 
 
-Here we will put our documentation which contains details for WRF-CTSM
\ No newline at end of file
+```{keypoints} Info
+A detailed documentation](https://escomp.github.io/ctsm-docs/versions/master/html/lilac/specific-atm-models/index.html)] about how to set up and run CTSM with WRF can be found in the original. 
+```
+
+Please follow the steps described there!
+Special advices for the supported HPC machines at UiO are given in the following.
+
+```{discussion} Build directory
+- It is good practice to NOT build your software in the source directory.
+- Choose a build directory, e.g. in your home or project directory
+```
+    
+    [~/HOME]$ export CTSM_BUILD_DIRECTORY=~/ctsm_build_directory
+    
+
+## 3.4.1.2 Building CTSM
+
+```{discussion} ESMF
+A 3. party software (ESMF) is needed for coupling to WRF. 
+- The version required (currently >= 8.1.0, 2018-09-10) is only available on FRAM.
+- Update or clone `dotcime` to include ESMF (commit 092d9f9).
+```
+For building CTSM with LILAC the path variable `ESMFMKFILE` has to be set in `config_machines`. 
+
+## 3.4.1.3. Building WRF with CTSM
+
+```{discussion} NETCDF
+In addition to the decribed steps, it is necessary to set the path to the Fortran NetCDF on FRAM before running `./configure`.
+```
+Set the path variables
+
+    [~/HOME]$ export NETCDF=${EBROOTNETCDFMINFORTRAN}
+    [~/HOME]$ export NETCDF_classic=1
+    
+When running `./configure` you will be asked for a set of compiler options [1-75]. A good choice is 15.
+
+```{discussion} Compiling WRF
+Compiling WRF takes a long time. Therefore, you should put the compiling job into the background. If your conection to FRAM breaks the job will still run!
+```
+    [~/WRF-CTSM]$ nohup ./compile em_real 2>&1 > compile.log & 
+    
+## 3.4.1.4 Building WPS
+
+The automatic creation of the configuration (option 19 is a good choice) fails to recognize the compilers, therefore you have to make some changes in `configure.wps` manually.
+
+    [~/WRF-CTSM/WPS] nano configure.wps
+
+Change 
+
+    DM_FC= mpiifort
+    DM_CC= mpiicc
+    
+and add `-gopenmp` to the end of the line which reads `LDFLAGS`.
+Because `jasper` is one of the compiler options you have to load two additional modules beforehand
+    
+    [~/WRF-CTSM/WPS] module load JasPer/2.0.28-GCCcore-10.3.0
+    [~/WRF-CTSM/WPS] module load libpng/1.6.37-GCCcore-10.3.0
+    
+## 3.4.1.5. Run WPS Programs
+
+```{discussion} plotgrid_new.ncl
+To have a look at your created domain you need to load NCL.
+
+`module load NCL/6.6.2-intel-2018b`
+
+Because we are using a new version of NCL, `plotgrid.ncl` may not work.
+Note: `namelist.wps` has to be in your working directory! But you can call it from anywhere using its absolute path. 
+
+```
+
+    [WORK/cases] ncl ${WPS_ROOT}/util/plotgrid_new.ncl
+    
+## Example scripts
+
+Reoccuring setting of environmental variables and loading of modules can be automated. We assume that you have set
+
+`export WORK=/cluster/work/users/${USER}`
+
+`````{tabs}
+
+````{tab} setpaths
+This example Bash script shows the environment needed to run WSP and WRF on FRAM.
+You would copy it to your home directory (e.g. to a subfolder bin) and execute it
+
+    [~] source ~/bin/setpaths
+
+```bash
+#! /bin/bash
+
+# Location of your CTSM clone
+export CTSM_ROOT=~/WRF-CTSM/CTSM/
+# Location of your CTSM build
+export CTSM_BUILD_DIRECTORY=~/ctsm_build_directory
+# Load all modules which WRF and CTSM have in common
+source $CTSM_BUILD_DIR/ctsm_build_environment.sh
+# For building WRF
+export WRF_ROOT=$WORKSPACE/WRF-CTSM
+export WRF_CTSM_MKFILE=$CTSM_BUILD_DIR/bld/ctsm.mk
+export WRF_EM_CORE=1
+export WRF_DA_CORE=0
+export NETCDF=${EBROOTNETCDFMINFORTRAN}
+export NETCDF_classic=1
+# For building WPS
+export WPS_ROOT=$WORKSPACE/WPS
+export WRF_DIR=$WRF_ROOT
+module load JasPer/2.0.28-GCCcore-10.3.0
+module load libpng/1.6.37-GCCcore-10.3.0
+# For running WRF
+export WRF_GEOG_PATH=/cluster/shared/wrf/geog_wrfv4
+
+```
+````
+
+````{tab} run_wps
+This example Bash script shows how to use WSP to process WRF input data (e.g. atmosphere and sea surface temperature).
+
+```bash
+#! /bin/bash
+# Before running this script for the first time 
+# make a new case directory in your home and
+# put a copy of $WPS_ROOT/namelist.wps into it.
+# Edit namelist.wps according to your domain.
+# Usage: ./run_wps <case_name>
+# Specify data source
+data_dir=$WORKSPACE/DATA/matthew
+# Reference to the case
+case=${1}
+
+case_root=${HOME}/wrf_cases
+tmp_dir=(atm sst)
+
+# Loop through the data
+for each in ${tmp_dir[@]}; do
+    if [ ! -d ${case_root}/${case}/${case}.${each} ]; then
+        echo "Make new directory ${case_root}/${case}/${case}.${each}"
+        mkdir -p ${case_root}/${case}/${case}.${each}
+    fi
+
+    cd  ${case_root}/${case}/${case}.${each}
+
+    if [ $each == atm ]; then
+        echo "Ungribing the atmosphere"
+        ln -sf ${WPS_ROOT}/ungrib/Variable_Tables/Vtable.GFS Vtable
+        ${WPS_ROOT}/link_grib.csh ${data_dir}/fnl
+        ln -sf ${case_root}/${case}/namelist.wps.atm namelist.wps
+    else 
+        echo "Ungribing the the sea surface temperatures"
+        ln -sf ${WPS_ROOT}/ungrib/Variable_Tables/Vtable.SST Vtable
+        ${WPS_ROOT}/link_grib.csh ${data_dir}_sst/rtg_sst_grb
+        ln -sf ${case_root}/${case}/namelist.wps.sst namelist.wps
+    fi
+
+    #if [ ls FILE | grep -c FILE == 0 -o ]
+    ${WPS_ROOT}/ungrib.exe
+
+    for exe in (geogrid metgrid); do
+        mkdir ${exe} && ln -s ${WPS_ROOT}/${exe}/${exe^^}.TBL.ARW ${exe}/${exe^^}.TBL
+        mpirun -np 2 ${WPS_ROOT}/${exe}.exe
+    done
+done
+
+```
+````
+
+````{tab} submit_wrf
+This example Bash script shows how to submit a WRF case to the queueing system on FRAM.
+
+
+```bash
+#! /bin/bash
+# Script for running on Abel. (c) Johanne Rydsaa
+# 2021-09-14 Update for fram. (c) Stefanie Falk
+# --------------------------------------------------------------------------
+# Job name:
+#SBATCH --job-name=wrf_exe
+#
+# Project:
+#SBATCH --account=nn2806k
+#
+# Number of cores/nodes:
+#SBATCH --ntasks=4
+#
+# Wall clock limit:
+#SBATCH --time=1:59:00
+#
+# Development queue for testing
+#SBATCH --qos=short
+#
+#
+## Recommended safety settings:
+set -o errexit # Make bash exit on any error
+#set -o nounset # Treat unset variables as errors
+# Must set large stack size (unlimited for simplicity)
+ulimit -s unlimited
+#
+# Set environment variables specifically used by WRF
+source ~/bin/setpaths
+# --------------------------------------------------------------------------
+# Make your changes here
+# WRF case name (create subcases by writing, e.g. matthew/01)
+CASE=matthew
+# Directory of WRF executable
+WRF_EXE=${WRF_DIR}/test/em_real
+
+#----------------------------------------------------------------------------
+# No need to change this section
+# Output directory
+SCRATCH=${WORK}/${CASE}
+# Make the work directory if not existent
+if [ ! -d $SCRATCH ]; then mkdir -p $SCRATCH; fi 
+
+## Copy files to work directory:
+cp ${WRF_EXE}/ozone*            $SCRATCH
+cp ${WRF_EXE}/RRTM*             $SCRATCH
+cp ${WRF_EXE}/wrf.exe           $SCRATCH
+## Change to work directory
+cd ${SCRATCH}
+
+## Run command
+mpirun -np 4 ./wrf.exe
+
+## Finish the script
+exit 0
+
+
+```
+````
+`````
+