Update StandardNamesRules.rst: add _due_to_planetary_boundary_layer

[climbfuji]

Add process suffix _due_to_planetary_boundary_layer as proposed new suffix in StandardNamesRules.rst.

This isn't exactly describing a process (i.e. is different than due_to_convection), but people use this or the abbreviation due_to_PBL a lot. Should it be even longer, i.e. _due_to_planetary_boundary_layer_processes ?

[nusbaume]

I think my two cents here are that I would prefer the longer _due_to_planetary_boundary_layer_processes, or maybe something more specific like _due_to_planetary_boundary_layer_turbulent_mixing (although I certainly realize it might be hard to disentangle every process if it is coming from a PBL physics scheme).

The reason I don't think I would want just _due_to_planetary_boundary_layer is because the PBL is also a location, and I could easily see variables like X_in_planetary_boundary_layer, which I feel could cause some confusion even with the different prepositions.

Of course I am happy to hear other people's thoughts as well, especially if they disagree. Thanks!

[gold2718]

Is _due_to_PBL_processes a decent compromise between length and clarity? I don't see any guidance in the CF conventions.

[climbfuji]

Is _due_to_PBL_processes a decent compromise between length and clarity? I don't see any guidance in the CF conventions.

We do spell out GWD as gravity_wave_drag, thus using PBL here would be inconsistent.

[climbfuji]

At the 12/12/2024 CCPP meeting, we discussed using abbreviations like GWD and PBL instead of the full names in the standard names. The rules need to clarify that the short names must be used instead of the long names whenever such an abbreviation is defined, and that we will spell out the full name in the long_name instead. I will update this PR and request reviews one more time.

[grantfirl]

There is an abbreviaton/acronym section in the rules (https://github.com/ESCOMP/CCPPStandardNames/blob/main/StandardNamesRules.rst). We can shorten names as needed and just add the acronym to the accepted list. PBL and GWD are good examples that are relatively well known in atmospheric sciences, and we can use the rules page to define them for those who are unfamiliar.

[climbfuji]

I updated the PR as discussed this morning (hope I got it right). Please (re-)review. Thanks.