Define variables, frequencies and realms for data expected over next months

[durack1]

We'll need to define the expected variables, frequencies, and realms for data appearing in the next months. Once this list is defined, tables meeting these needs can be finalized for inclusion and use in demos.

We have a NCA6 planning spreadsheet - would that be linkable to this issue?

@gleckler1 @paullric

[paullric]

For the time being we'll only be managing daily tasmin, tasmax and pr. The list of data products for NCA6 isn't public yet, nor fully decided upon.