477 add princeton met forcing

[ccarouge]

CABLE

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Description

Add the Princeton forcing as part of the changes brought by the groundwater work. The implementation follows the way it was initially done for the groundwater with the following differences:

• adaptation to the refactoring of the driver
• bug fixed in renameFiles_Princeton() (added the "BACK" keyword to INDEX() call) and modification in cable_input since Princeton does not provide a file for snowfall.

Fixes #477

Type of change

Please delete options that are not relevant.

• New

Checklist

• The new content is accessible and located in the appropriate section.
• I have checked that links are valid and point to the intended content.
• I have checked my code/text and corrected any misspellings

Testing

When running with the Princeton forcing on for the year 1948, I have tested that the forcings output by CABLE are identical to the values in the input files. This is true except for the pressure and precipitation variables:

• pressure shows a small noise with a maximum difference of 0.008 Pa that is negligible. This is linked to the unit conversions between hPa and Pa.
• precipitation shows a few grid cells with differences up to -4e-10 mm/s. This is negligible and likely due to the split between rain and snow precipitation.

benchcab fluxsite tests return bitwise-comparable results with main, highlighting no side effects:

2025-03-13 18:25:58,919 - INFO - benchcab.benchcab.py:381 - 0 failed, 168 passed

Please add a reviewer when ready for review.

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📚 Documentation preview 📚: https://cable--524.org.readthedocs.build/en/524/

[SeanBryan51]

Requesting a few small changes but looks good overall

[ccarouge]

Requested changes added and tested.

[ccarouge]

@SeanBryan51 FYI, while resolving the conflicts with main, I've noticed 2 unused statements (USE renamefiles). I've removed them and confirmed it compiles after the conflict resolution.