We present a brief summary of the types of model runs. An initial run starts the model from an initial conditions dataset. As the model executes, history datasets, restart datasets and initial condition datasets are written periodically. Refer to "Model Output Datasets" for more details. In particular, see "Model generated initial condition dataset files" for more details on model generated initial condition datasets.
In addition to initial simulations, there are two types of
continuation runs: restart and branch. A restart run is an exact
continuation of a previous simulation from its point of
termination. Namelist variables other than NESTEP, NELAPSE,
and NSREST should never be modified for restart
runs. A more detailed discussion of the restart files, including a
description of their contents and related coding issues, is presented
in "Restart Files" . A branch run, on the
other hand, is a new case that uses restart data from a previous
simulation to begin the integration. Since a branch run must
be a new case, the length of the history interval and the output
history fields do not have to be the same as in the control
simulation. For example, the branching option can be used to output
selected fields more frequently than was the case in the control run.
Only history file namelist options should be modified for branch
runs. If the user desires to modify other options, such as physics
control variables, a new initial run should be done using initial
datasets generated by the control run.
Questions on these pages can be sent to... erik@ucar.edu .
Search page