Other Useful XML Variables

Variable	Description
PIO_DEBUG_LEVEL	Sets the level of standard output print statements. This variable is useful for debugging. If debugging, a higher value may be set
DOUT_S	Turns on short-term archiving. DOUT_S is set to TRUE by default.
HIST_OPTION	Sets the driver snapshot history file frequency.
CCSM_CO2_PPMV	CO2 value to be propagated to CLM, when OCN_CO2_TYPE and CLM_CO2_TYPE are set to 'constant'.

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Next up

In the next chapter, you will practice what you have learned about xml variables in a few exercises.