[MITgcm-support] Question about generating unified .meta and .data files in Cubed-Sphere simulations

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Dear Community,

I am currently conducting simulations using the MITgcm with a Cubed-Sphere grid configuration.

In the past, I have read output data consisting of multiple .meta files (e.g., XC.001.001.meta, XC.002.001.meta, etc.) using MITgcmutils.rdmds, followed by applying my own regridding functions during post-processing.

Recently, I came across a Python package called cubedsphere(https://github.com/AaronDavidSchneider/cubedsphere), which seems to offer a more streamlined workflow for handling Cubed-Sphere grids. However, it appears to rely on the existence of unified .meta files such as XC.meta, which are not generated by default in my MITgcm outputs. Similarly, the open_mdsdataset function in xmitgcm also expects grid meta files in a unified format.

I have since learned that setting globalFiles = .TRUE. in input/data allows MITgcm to generate single .meta and .data files per timestep, even with a Cubed-Sphere grid. This seems like a promising approach for future simulations.

However, for simulations that I have already completed, the output files are split by tile (e.g., S.0000000000.001.001.meta, S.0000000000.002.001.meta, etc.).

Therefore, I would like to ask:

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Is there any recommended method or tool to combine these previously generated tiled output files into unified .meta and .data files (e.g., S.0000000000.meta) after the simulation has finished?

Any advice, suggested tools, or workflows for this post-processing task would be greatly appreciated.

Thank you very much for your time and support.

Best regards,
Fisher
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