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Description: Incorrect CCSM_CO2_PPMV value set for WACCM (FW and F1850W)
Date       : July 27, 2010
Contact    : fischer
Information:

For the F_1850_WACCM or F1850W compset.  CCSM_CO2_PPMV should be set to 284.7, 
before configuring the case, in env_conf.xml using the following command.

xmlchange -file env_conf.xml -id CCSM_CO2_PPMV -val 284.7


For the F_2000_WACCM or FW compset.  CCSM_CO2_PPMV should be set to 368.9, 
before configuring the case, in env_conf.xml using the following command.

xmlchange -file env_conf.xml -id CCSM_CO2_PPMV -val 368.9

This variable had been set to 1e-6, as it was believed it was not used by the
model. It is used in this compset, however. If it is not changed, the land
model will crash about 80 days into the run.