UV VIS4

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UV_VIS4
Option to activate/deactivate horizontal, biharmonic viscosity of momentum. The bihamonic mixing of momentum can be applied along terrain-following or geopotential levels. In ROMS, the viscosity is derived from the horizontal divergence of the deviatory stress tensor (Wajsowicz, 1993).
parameter = visc4(ng)
variable = visc4_p(:,:), visc4_r(:,:)
required = MIX_S_UV, MIX_GEO_UV
related = VISC_GRID
routine = uv3dmix4_s.h, uv3dmix4_geo.h, uv3dmix.F