Need to provide TOPO_FILE arg in MOM_input otherwise MOM6 looks for bathymetry in topog.nc

[AVEllepola]

I am currently using regional_mom6 version 0.5.1. I get the following error when I try to run the reanalysis example. Renaming a copy of the bathymetry.nc file in the inputdir as topog.nc resolved this. Just wanted to share this as a user experience.

[navidcy]

thanks @AVEllepola! I just renamed the issue title to be descriptive of the situation.

cc @ashjbarnes

[navidcy]

I'm wondering if the expectation for a bathymetry file called topog.nc comes from MOM6 itself or from the MOM6 input files that the regional-mom6 package provides. @ashjbarnes do you have an idea?

[navidcy]

Here it seems that the "premade" input files are such that topography is expected to be read from file:

regional-mom6/demos/premade_run_directories/common_files/MOM_input

Lines 48 to 51 in e16340d

	TOPO_CONFIG = "file" !
	! This specifies how bathymetry is specified:
	! file - read bathymetric information from the file
	! specified by (TOPO_FILE).

But do we provide the TOPO_FILE variable?

[navidcy]

seems to me that if we don't provide TOPO_FILE then MOM6 assumes that the filename is topog.nc

https://github.com/NOAA-GFDL/MOM6/blob/b98acd861d835c0bf5894f872516d2338a4791f4/src/initialization/MOM_shared_initialization.F90#L156-L158

[navidcy]

@ashjbarnes, what's a good solution here you think?

[ashjbarnes]

Thanks @AVEllepola ! This should sort it out. I've tested with this branch and mom6 runs on the example demo again