Fix bounds on several fields

[xylar]

Antarctic max elevation is ~5000 m, so give it some buffer.

Grounding line flux can occasionally go negative (e.g. at ice rises) so allow a small, negative flux.

[xylar]

@hgoelzer, let me know what you think of these changes. Feel free to suggest alternatives.

[hgoelzer]

Hi Xylar, here are a few more bounds problems reported by ISM_BERN we should address at the same time. Can you add those please?

• acabf variable, our minimum value in the simulation (-0.0004506820987444371) is out of range based on the file checker. Min value accepted: -0.0001: we think this our value is resulting from the climatic mass balance variable from the CESM2-WCCM ssp585 forcings. We checked the value of the SMB that our ISM reads as an input from the PISM ISMIP6 surface forcing scheme: in the last year of the future simulation it is lower than the lower accepted limit of -0.0001 kg m-2 s-1.

• libmassbfgr variabole, max value is out of range. Max value accepted: 0.0: same as in the historical simulation.

• strbasemag variable, max value (8963770.0) is out of range. Max value accepted: 300000.0: same as in the historical simulation.

• xvelmean variable, max value (0.0005406480049714446) is out of range. Max value accepted: 0.0004: same as in the historical simulation.

[hgoelzer]

See my comment in conversations with additional bounds

[xylar]

@hgoelzer, I'm seeing:
https://github.com/ismip/ISM_SimulationChecker/blob/main/conventions/ISMIP7_variable_request.csv#L7
so it looks like acabf has already been addressed?

For the others, I'm happy to adjust but please let me know what you want the new bounds to be.

[xylar]

libmassbfgr already has a non-zero upper bound:
https://github.com/ismip/ISM_SimulationChecker/blob/main/conventions/ISMIP7_variable_request.csv#L8

[xylar]

I made my best guesses with strbasemag, xvelmean and yvelmean. It doesn't look to me like acabf and libmassbfgr need further updates, but let me know.