CCPP Framework Meeting Minutes 2019 07 18

Constants / constants dictionary

• ???? (please add the name of the group working on the constants dictionary) have a constant dictionary and turn this into a Fortran module
• how about different sets? we only want one?
• we can write a piece of code to create a constant file and metadata file from the yaml constants dictionary that can be used by any host model
• need to agree on standard names
• current form is just a yaml file, little information on top
• we have metadata for the constants that get used in the physics
• changing the constants in an operational model is a difficult think, can add them as a separate set to the dictionary - the advantage being that people can test their models with different constants

NCAR/CPF progress

• Dave is in charge of making MPAS a CPF model and create a WRF suite in CPF
• has already identified most of the standard names in GFS physics that are needed by WRF physics
• working with Steve to generate a multi-model table of variables (standard names, ...), make this a webpage

Other CCPP efforts

• NOAA chemistry
  • GSD-CHEM runs through coupler and comes into FV3 via cplchm
  • Haiqin and Georg have a project to put some of this chemistry into CCPP and run it inside FV3
  • is there any coordination with NCAR's chemistry efforts - no
• NCAR NUOPC-CCPP cap: hurricane supplemental project for Steve, but money hasn't come in yet
• RRTMGP:

Namelist support:

• something that we need to tackle soon

UFS now pointing to master branches of ccpp-framework and ccpp-physics on NCAR GitHub

• is this a problem, do we need to change this, i.e. move it elsewhere (not under NSF control)?
• would escomp be a good place?
• do they need to point to a different branch, or to their own institutional fork?
• still the official master will have to be compatible UFS

Vertical direction and vertical coordinate

• we need to decide on the metadata standard to describe these
• this needs to be an attribute of each 3-dim variable, use a default "bottom_up"
• define "up" as against field of gravity
• this will allow us to do the flipping
• still not a solution for a vertical dimension: is it height based, pressure based, ...
• is a hybrid pressure coordinate the de-facto standard?
  • which pressure? dry? moist?