Add explicit alpha_fd coefficient to TOFD in UGWPv1 drag suite #840
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@DusanJovic-NOAA This should be able to be closed since it is supposed to be combined into #836 |
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Description
In ccpp-physics submodule, added explicit 'alpha_fd' coefficient to drag_suite.F90 which corresponds directly to 'alpha' coefficient in Beljaars et al. (QJRMS, 2004), which by default is 12.0. The coefficient will be a runtime namelist option, and can control the strength of the turbulent orographic form drag (TOFD).
Note that the runtime results are bit-for-bit identical to those of the previous version unless a value other than alpha_fd = 12.0 in the namelist.
In fv3atm, added 'alpha_fd' to GFS_typedefs.*.
Issue(s) addressed
This PR addresses ccpp-physics Issue #208.
Testing
Regression tests have been performed on Hera with the Intel and Gnu compilers. The tests involving ugwpv1 all passed for both intel and gnu compilers, however, some of the other gnu tests failed. These tests also failed with the previous commit, so failures don't appear to have to do with the code changes in this PR.
Dependencies
ccpp-physics PR#210