This directory contains a file splco2_cis92a.dat needed to incorporate
atmospheric CO2 into the time-dependent inverse dye patterns.  File
splco2_cis92a.dat contains carbon dioxide concentration in units of ppm from
1765 to 2010 and is a combination of files splco2_mod.dat and cis92a.dat
obtained from quercus.igpp.ucla.edu/OceanInversion/inputs/atm_co2/