CCPP Framework Meeting Minutes 2020 07 30

Agenda

• report out from UFS Users' Workshop
• transition to cap_gen.py

Report out from UFS Users' Workshop

• Fanglin and Vijay mentioned the need to compile ccpp-physics in single or double precision, or even further mix the precision (users should be able to define on a per-scheme basis which precision to use) - not right now, obviously, but in the future
• cleanup work:
  • replace machine.F with auto-generated module from cap_gen.py
  • correctly specify real variables in existing physics (all of them ...)
    • this will also be require to clean up the build system
    • we need clear rules how to set file-specific compiler flags

Transition to cap_gen.py

• DTC timeline and resource chart (https://docs.google.com/spreadsheets/d/1XbSF1ejYcPMrVtZtk1OSiMX-vI5srLkwEUhyAirGr8k/edit?usp=sharing)
• things that need to happen for transitioning UFS to cap_gen.py (https://docs.google.com/document/d/1M3mCO3ESR9OJqLyUbQf-ahJtmfmGKilZlWaBTxsfMRk/edit?usp=sharing)

NRL collaboration

• Alex and Dom will update NEPTUNE to the current ccpp_prebuild.py on July 31
• Steve will work with NRL on additional functionality required for NEPTUNE in cap_gen.py (CCPP need to inform dycore about tracers that need to be advected etc.)
  • this could potentially replace the field_table and tracer_manager in FV3