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fixing some bugs for recent obcs_add_tides commit
adding tidal velocity forcing capability to obcs Modified Files: model/src/dynamics.F forward_step.F the_main_loop.F pkg/obcs/OBCS_FIELDS.h OBCS_OPTIONS.h OBCS_PARAMS.h OBCS_SEAICE.h obcs_apply_eta.F obcs_apply_r_star.F obcs_apply_surf_dr.F obcs_apply_ts.F obcs_apply_w.F obcs_calc.F obcs_check.F obcs_init_variables.F obcs_readparms.F verification/seaice_obcs/code/OBCS_OPTIONS.h Added Files: pkg/obcs/obcs_add_tides.F verification/seaice_obcs/input.tides/* verification/seaice_obcs/results/output.tides.txt
- fix various problems in the phase speed computations of the Stevens boundary conditions: - sign error for western and southern boundaries, - time tendencies were underestimated by factor of dTracerLev and some just zero (for multidim advection schemes) -> now estimate time tendencies from difference between previous (n) time level and the one before (n-1); this requires storing a field per tracer per boundary, also in the pickup files. - replace deltaTmom in cflMer/Zon computation with dTracerLev - set default phase velocity to cflMer/Zon - requires updating verification experiment exp4.stevens
fix Stevens BCs by using intermediate velocities of previous time step as "baroclinic" contribution rather velocity of one grid cell inside the boundaries; more consistent but makes the entire treatment more complicated, requires new pickup files and two new S/Rs: obcs_copy_uv_n and obcs_save_uv_n keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY (undefined by default)
split header file "OBCS.h" into 4 separated files ; keep a temporary OBCS.h version for backward compatibility.
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