FV3 CCPP: wet() bug fix and workaround for bad tsfco

[SamuelTrahanNOAA]

Commit Queue Requirements:

• Fill out all sections of this template.
• All sub component pull requests have been reviewed by their code managers. There are no reviews yet.
• Run the full Intel+GNU RT suite (compared to current baselines) on either Hera/Derecho/Hercules
• Commit 'test_changes.list' from previous step

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Description:

Fixes this problem:

• global_nest_v1 suite: infinite cumulative surface upwelling long-wave flux #2547

It was caused by missing values (-1e+20) for sea surface temperature on wet points in input data. (Wet points are points where the CCPP wet array is true, thus indicating the surface is at least partly water.) There's a bug fix and a workaround:

1. Bug fix: In certain situations, the wet array can be mistakenly true when it should be false due to the location being 100% ice. An "else" statement corrects this.
2. Workaround: If the input sea surface temperatures (tsfco) are invalid on a wet point, the lowest model level temperature is used instead.

There is no other temperature available on those points that can reasonably be used as a sea surface temperature. The lowest model level temperature may not be a perfect analogue for the sea surface temperature, but it'll be more realistic than -1E+20 K.

Commit Message:

 * ccpp-physics - wet() bug fix and workaround for bad tsfco

Priority:

• Normal

Git Tracking

UFSWM:

• Closes global_nest_v1 suite: infinite cumulative surface upwelling long-wave flux #2547

Sub component Pull Requests:

• FV3: CCPP physics: wet() bug fix and workaround for bad tsfco NOAA-EMC/fv3atm#916
  • ccpp-physics: wet() bug fix and workaround for bad tsfco ccpp-physics#247

UFSWM Blocking Dependencies:

• None

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Changes

Regression Test Changes (Please commit test_changes.list):

• No Baseline Changes.

Input data Changes:

• None.

Library Changes/Upgrades:

• No Updates

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Testing Log:

• RDHPCS
  • Hera
  • Orion
  • Hercules
  • Jet
  • GaeaC5
  • GaeaC6
  • Derecho
• WCOSS2
  • Dogwood/Cactus
  • Acorn
• CI
• opnReqTest (complete task if unnecessary)