Data assimilation cycles

The DATA_ASSIMILATION_CYCLES setting within CESM denotes how many model integration, filter and inflation cycles will be attempted within a single CESM job submission. This a typical setting for CAM:

STOP_N: 6
STOP_OPTION: nhours
DATA_ASSIMILATION_CYCLES=4

Within a single CESM ./case.submit job, the model will run for 24 hours with filter and inflation running at 6-hour intervals.

This is a typical setting for POP:

STOP_N: 1
STOP_OPTION: ndays
DATA_ASSIMILATION_CYCLES=5

So within a single CESM ./case.submit job, the model will run for 5 days with filter and inflation running daily.

Note

The CESM RESUBMIT setting is distinct from DATA_ASSIMILATION_CYCLES. The value that RESUBMIT is set to denotes how many times ./case.submit will be invoked. Each submitted job must be completed within the period denoted by JOB_WALLCLOCK_TIME.