[MITgcm-support] Lateral diffusion input file?

[Martin Losch]

Hi Maria,

there are no 3D lateral diffusion fields that I know of. Instead the diffusive fluxes are computed per layer in pkg/generic_advdiff/gad_calc_rhs.F
So as a hack you could modify that file by setting the diffusivities to zero (or a small value) when k>1.  (e.g. by not calling gad_diff_x/y for k>1)

Martin


On Nov 12, 2010, at 12:58 PM, Broadbridge M.B. wrote:

> Hello all,
> 
> I was wondering if there is a way of prescribing an input file for the
> Laplacian and biharmonic horizontal diffusivities? I know that you can
> specify a diffKrFile for the vertical diffusivity, but I have not found
> anything of that kind for the lateral diffusivities in ini_parms. I¹m
> basically interested in prescribing lateral diffusion in just the top layer
> of my vertical grid.
> 
> Does anyone have experience with this?
> 
> Cheers,
> 
> Maria
> 
> 
> -- 
> Mrs Maria Broadbridge
> 
> PhD Student Physical Oceanography
> Room 166/04
> National Oceanography Centre, Southampton
> University of Southampton Waterfront Campus
> European Way
> Southampton SO14 3ZH
> United Kingdom
> 
> email: m.broadbridge at soton.ac.uk
> 
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