These are histories files from Ray's double resolution run. He ran the model for 5 simulations years
to reach equilibrium for a change of the lower boundary composition
the 3 directories:
nchange: no co2 change
dchange: double co2
gchange: change several gas concentrations to year 2100 level

There are 3 primary histories and 6 secdondary histories in each directory
use secdondary history since it is hourly record and it has much more variables than 
those in primary histories.
use seqncn005.nc seqdncn005.nc seqgncn005.nc
These 3 secondary histories has one-day hourly data in them for the last day