CCPP Framework Meeting Minutes 2019 08 22

Updates:

• Steve wrote a new tool that analyzes a Fortran file and creates a prototype of the metadata file

WRF-MPAS-GFS physics interoperability:

• both WRF-MPAS and GFS have YSU
• Dave and Chunxi looked at the code diffs and identified places that need to be combined (fields needed by WRF-MPAS not in GFS version and vice versa)
• fields with different units, some fields (tracers) in one big array versus split out
• temperature versus potential temperature
• demonstration deadlines coming up soon - when?
  • portability aspect of YSU scheme to GFS is not in a critical path
  • but portability to CESM early/mid September (when YSU needs to run through CCPP in MPAS)
• will start with the version that in in WRF-MPAS, not with what is in ccpp-physics today
  • this version has one horizontal dimension and one vertical dimension
  • needs starting and ending for horizontal dimension
• in ccpp_prebuild.py, optional arguments are used to pass the available data (e.g. temperature or potential_temperature) to the scheme
• another option would be to augment the SDF and add information about optional arguments in there (instead of ccpp_prebuild.py)
• what about a host model that doesn't have combined tracer arrays
  • in the past, we had discussions that these combined arrays would be constructed based on information in the metadata