Double-check PCIC12 data

[corviday]

In the past, I have made PCIC12 ensemble means with whichever run for each model was available. However, the PCIC12 average is defined as 12 specific runs:

I should revisit already-calculated PCIC12 averages and make sure they were made with the correct runs. They should have the filenames of constituent files in the history attribute, from the cdo ensmean command.

[corviday]

Both r1 and r2 data from CCSM4 are present in the database.