How to control the frequency of history files being written to disk

[Sameer Agarwal]

Folks,
I am a CESM newbie, so I apologize if this has an easy/well known answer. I am using CESM 2.2.

How do I control the frequency at which the various components write their history files to disk? The system default is monthly, but I do not know what variables I should be modifying to have the atmosphere, ocean and land models to write daily files instead of monthly averages to disk.

The only options I see are in env_run.xml

HIST_OPTION, HIST_N
AVGHIST_OPTION, AVGHIST_N
But they seem to only apply to the driver, and are set to never/-999 respectively. Which does not match the monthly history files being dumped by the various components.

So, is there a global setting that will get all the active components to write their daily averages? If not how do I go about configuring the individual components to do this?

Thank you,
Sameer

 

[katec]

Hi there,
Each component has a different method for changing history output frequency, and you can put your changes in the user_nl file for each component.

If you go to this webpage: CESM2 Component Configuration Settings

And then click on the "Namelist Definitions" for each component that you are interested in changing the history for, then search the namelist options for "hist" or "history" and you should be able to find the variables for each component.

As a quick tip: look for nhtfrq for CAM, hist_nhtfrq for CLM, and history_freq for POP.

 

[Sameer Agarwal]

Thank you, that should get me started. It would be nice if the naming scheme across components was uniform.