During a model simulation, initial condition datasets are generated periodically by default. These datasets are simply history files containing instantaneous values for only those fields that are required to begin an initial run. The naming convention for these files (which is different for the other history files) is $CASE.cam2.i.yyyy-mm-dd-sssss.nc, where $CASE is the caseid, yyyy is the year (note, more than 4 digits will be used if needed), mm is the month, dd is the day and sssss is the seconds. The output frequency of the files is controlled by namelist variable INITHIST and is independent of the output frequency of other history files.