Alternative to interpolate_output for fv dycore?

[teopb]

Hello,

I would like to output a history file on a reduced size lat/lon grid. I found instructions on how to use the interpolate_output namelist variable, which would seem to do roughly what I want but it does not appear to work with the fv dycore, yielding the following error:

ERROR: interpolate_output is not supported for fv dycore

Though after a clean build on the relevant case it did run but then quickly segfaulted when trying to write the history files so not sure what that means.

Is there a good way to accomplish this? 'This' being writing to a history file at a much lower resolution than the model is run at to prevent having to save needlessly large files just to have to convert them down later for some post analysis tasks?

Thanks!

 

[hannay]

The flag interpolate_output works to interpolate from the Spectral Element grid to the Finite Volume grid.
For instance to interpolate the file h0, h1, h2 and h3 from ne30 to f09, you would set:

interpolate_output = .true.,.true.,.true.,.true.
interpolate_nlat = 192,192,192,192
interpolate_nlon = 288,288,288,288

But I am not sure if works from one fv grid to a coarser fv grid.

 

[teopb]

Hi Cecile,

Thank you for your response. That squares with my understanding of its behavior. It seems to fail when trying to go from a fv grid to a coarser grid. Do you know of any alternative approaches? Not sure if this is a task better suited to post-processing.

Thanks!

 

[goldy]

The interpolate_output is a special purpose code for the spectral element dycore. The documentation should mention that.
At the current time, CAM does not have any general inline processing to perform this sort of interpolation.