move surface tendency after precipitation tendency #3159
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Sbozzolo
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Jun 29, 2024
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Purpose
Move surface tendency after precipitation tendency so that precipitation used in atmos and surface tendencies are in sync. Fixes water conservation issue with SSP. After this change, SSP conserves water but ARS doesn't (2% error in 100 days): https://buildkite.com/clima/climaatmos-gpulongruns/builds/264#_. We should look into ARS if we want to use it.
I don't like that we need to have a specific order of tendencies for the test to work, but this is a quick fix and refactoring precipitation needs more work. cc @trontrytel . We should check what the coupler is doing.
Also changes energy conservation to use the initial condition as the reference. Only water conservation uses the final state as the reference, because the initial condition can be zero.
Closes #3113
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