How to deploy the scalable barotropic solver for ocean component in CESM.
(1) Create a complete case:
./create_newcase -case YOUR_CASE -res T62_t12 -compset B1850CN -mach yellowstone
or an ocean component:
./create_newcase -case YOUR_CASE -res T62_t12 -compset G -mach yellowstone
(2) Copy all of these 6 files (POP_SolversMod.F90, barotropic.F90, build-namelist, initial.F90, namelist_defaults_pop2.xml, namelist_definition_pop2.xml) into the path $YOUR_CASE_DIR/SourceMods/src.pop2/
(3) Execute the command: ./YOUR_CASE.build
(4) Add two more lines at the end of the file: $YOUR_CASE_DIR/user_nl_pop2: preconditionerchoice = 'evp' solverchoice = 'PCSI'
(5) Execute $YOUR_CASE_DIR/preview_namelists
(6) Run you case with: ./YOUR_CASE.submit
Note that the detailed configuration files are included in the config directory, which contains Readme.case, Macro, and user_nl_pop2. The CESM users can repeat our experiments following the Readme.case. Our compiler paramenters and dependent libraries have been indicated in Macro file. The user_nl_pop2 file is the namelist file provided by users.