Description

When shifting a moving nest, many surface parameters require that downscaling from coarse resolution be aware of land/sea masks. Many land variables have -9999 or other physically invalid flag values for ocean points; these should not be interpolated onto high resolution land points.

Solution

Testing of the upcoming NOAH MP LSM moving nest code revealed some bugs in the initial implementation. While we are not ready to commit the NOAH MP moving nest code yet due to unresolved issues with upstream DA, the land mask code changes should provide an incremental increase in stability for the moving nest code with all physics options.

Alternatives

N/A

Testing:

1. Have you tested the code changes? On what platforms?
2. Have you run regression test in ufs-weather-model or ufs-s2s-model with code changes?

• Will the baseline results change?
• If yes, please give brief explanation of your code updates on the regression test.

Dependent PRs:

Should stand alone.