WRF-SUEWS coupling project

Make sure to use the following commands after cloning the repo:

git submodule init
git submodule update

These commands update SUEWS repo associated with WRF-SUEWS. Currently, it is an older version of SUEWS than the most up-to-date one.

Firstly make sure to use same compiler (preferably INTEL) for installing pre-requisite libraries and WRF model compilation. To load intel compiler setting on JASMIN type module load intel/20.0.0

Please follow the official guide here for other libraries requirement for the WRF compilation.

Set the wrf-suews environment by typing conda env create --file=wrf_suews.yml and activate it by conda activate wrf-suews in the WRF-SUEWS directory.

1. Go to coupling-automator folder, and type make

2. It creates the compilation-YYYYMMDD folder to compile (name of the folder depends on what you specify here)

3. In the created folder, type ./configure This is for configuration of WRF-SUEWS. Choose number 15 for the compiler (as of WRFv4 this refers to standard intel compiler) and basic option for the nesting.

4. Then you need compile the code: ./compile em_real >& log.compile. For this, you can submit the job file by sbatch sb-compile.sh in the compilation folder (specified by path_working in automate_main.py).

5. After compilation of the code, you need to transfer all the wrfinput_d0* files generated with WSPS to the location of main run (usually ./test/em_real OR ./run) (rename the files to the original names by removing .suews from the filenames). Also include the boundary condition wrfbdy_d01 file in the run directory.

6. You also need to copy namelist.suews to the same location.

7. Use LANDUSE.TBL in ./test/em_real to change the albedo associated with Urban areas (number 13 for MODIFIED_IGBP_MODIS_NOAH for both winter and summer. By default it is 15% (0.15). In London case, it is changed to 11% (0.11) based on Ward et al. 2016)

8. namelist.input should also be modified to be consistent for WRF-SUEWS. See examples here (specially the sf_surface_physics = 9 which specifies to use SUEWS as the LSM).

9. The rest of steps, are similar to usual WRF runs (running WRF-SUEWS)

Darwin Kernel Version 23.1.0: Mon Oct  9 21:27:24 PDT 2023; root:xnu-10002.41.9~6/RELEASE_ARM64_T6000 arm64

GNU Fortran (Homebrew GCC 13.2.0) 13.2.0

Due to the newer version of GCC, the compilation of WRF-SUEWS is not straightforward. The following steps are required to compile WRF-SUEWS on Apple M1 chip.

1. use homebrew to install gcc-13.2.0 and netcdf

brew install [email protected] netcdf-c netcdf-fortran

2. change GCC to the homebrew version: locate the gcc-13.2.0

which gcc-13

set symlink to the gcc-13.2.0

ln -s /opt/homebrew/bin/gcc-13 /usr/local/bin/gcc

3. set the environment variables for netcdf

export NETCDF=/opt/homebrew/

NB. this is set at the root of homebrew to avoid the error of "netcdf.inc" not found.

4. generate compilation working directory

cd coupling-automator
make

5. configure WRF-SUEWS settings

cd compilation-20211018 % this is the directory generated by make, the date part may be different
./configure

choose 15 for serial gcc/gfortran compiler

6. modify configure.wrf to use the correct compiler flags

note the following lines in configure.wrf

FCBASEOPTS      =       $(FCBASEOPTS_NO_G) $(FCDEBUG)

modify it by adding more flags

FCBASEOPTS      =       $(FCBASEOPTS_NO_G) $(FCDEBUG) -fallow-invalid-boz -fallow-argument-mismatch

7. compile WRF-SUEWS

./compile em_real >& log.compile

To generate the original wrfinput files (before processing them for WRF-SUEWS), you should follow here. After generating wrfinput and wrfbdy, you need to follow pre-processing instructions to modify the input file suitbale for WRF-SUEWS runs

Please refer to this instruction for WRF-SUEWS preprocessing system (WSPS).