Held-Suarez Velocity Field Bug

[bischtob]

Description

When running Held-Suarez, the time and zonal average of the meridional velocity is positive everywhere. This is unphysical.

Steps to reproduce

Steps to reproduce the behavior:

1. In master branch
2. Just run basic Held-Suarez
3. Takes a few hours of runtime to discover

Expected behavior

Field should have positive and negative values.

Screenshots

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Environment and error messages

• Backtrace of error message
• Include output of julia> versioninfo()

Additional context

Add any other context about the problem here.

For CLIMA developers

• [ x] The bug can be reproduced
• [ x] Labels have been added and developers assigned
• [ x] The bug can be fixed (if not, please explain why not in a comment below)
• [ x] There is a timeline to fix the bug
• [ ] The bug has been fixed (Please link the PR)

[bischtob]

Most likely a sponge-related issue due to angular-momentum conservation violation.

[bischtob]

Now tracked in #1247