Feature/pnorris/#512 add additional radiation rrtmg tau and water path diagnostics #519
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…tion_RRTMG_TAU_and_Water_Path_Diagnostics
…tion_RRTMG_TAU_and_Water_Path_Diagnostics
sdrabenh
approved these changes
Feb 3, 2022
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This is a PR to add extra diagnostic cloud fractions and in-cloud optical depths (on the column and the low/mid/high super-layers) that use the cloud sub-column generator actually called by RRTMG SW/LW rather than the MAX-RAN cloud overlap assumed by Chou-Suarez and ISCCP. There are important provisos noted in comments in the EXPORT definitions section of the Solar and Irrad Set_Services as to the use of these diagnostics.
The PR contains two main elements:
Note on 0-diff: These changes are essentially zero-diff. The only field that is non-zero-diff is TAUTT and it is only changed to roundoff level (~1e-5) for efficiency purposes. The model evolution is zero-diff since TAUTT is a diagnostic export only. The other new exports are also diagnostic and do not affect the model state.