WRF constant diffusion

Discuss advection schemes, timestepping, pressure gradients, coordinates, etc.

WRF constant diffusion

Postby badtanjil » Thu Jul 02, 2020 7:02 pm

When setting constant diffusion options we found that diffusion of scalars (specifically temperature) has an eddy diffusivity value set to 3 times what we specify in the namelist, why is this done and why is this not documented in the namelist or elsewhere? We are giving constant diffusion in both horizontal and vertical directions. We are using km_opt=1 and diff_opt=1 on namelist.input.
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