MPI_NOLAND CPP Key: Visualization Problems

parallelization
1

Hello,
I’m currently setting up a new regional configuration in the northwestern Mediterranean Sea. To optimize computation time, I’m using the CPP key MPI_NOLAND. However, I’m facing some difficulties with the visualization of the output files when using this key.
I’m having trouble visualization the data either with croco_gui or with some personal Python scripts (which both work fine with outputs produced without MPI_NOLAND, which is why I suspect the issue is related to this key).
The main issue when visualizing with croco_gui concerns the longitude and latitude ranges: their maximum values go up to around 9.9692e+36, and I have to manually reset them to the correct values. I think this might be due to some land (zero-value) points being added randomly in the background.
I was wondering if anyone else has encountered the same issue.

thanks in advance!
Alice

2

Yes it is a common problem with MPI_NOLAND because lon,lat arrays have missing values in this case

For now, the fix I suggest is to change the lon,lat of the result by the ones from your grid file.

This can be done using nco commands

3

And to complete, there is missing values in the areas not covered by any MPI-domain

So this is not a “quick fixable” thing to do.

4

Thank you ! Replacing lon,lat by the ones from my grid file works !