[ncl-talk] Vertical interpolation

[markus.mingel at libero.it]

Dear Dennis,

thanks for clarifications, that's exactly was I looking for.

Regards,

Markus

>     Il 03/09/2021 18:03 Dennis Shea <shea at ucar.edu> ha scritto:
> 
> 
> 
>     "I found the function vinth2p_ecmwf very useful for my purpose, but I am a bit puzzled if it is right to use it with all the models.:
> 
>     The difference between  vinth2p  and vinth2p_ecmwf
> 
>     is that the latter uses "an ECMWF formulation to extrapolate values below ground."
> 
>     If the pressures at hybrid levels are computed using the dimensionless coefficients (A, B):
> 
>                  p(k) = A(k)*PO + B(k)*PS   
> 
>     then yes.
>     ====
>     Some models output a hybrid component, Ap(k) [=A(k)*p0], which has units
>     of pressure. This must be made dimensionless prior to use.
> 
> 
>      
> 
> 
>     On Fri, Sep 3, 2021 at 2:20 AM markus mingel via ncl-talk <ncl-talk at mailman.ucar.edu mailto:ncl-talk at mailman.ucar.edu > wrote:
> 
>         > > 
> >         Dear All,
> > 
> >         I would convert CMIP6 models from hybrid coordinates to pressure levels. I found the function vinth2p_ecmwf very useful for my purpose, but I am a bit puzzled if it is right using it with all the models. In fact, the description of the function reports: "Interpolates CESM hybrid coordinates to pressure coordinates", so I do not know if it works with all models (except CESM) even if they are in hybrid coordinates.
> > 
> >         Any clarification is welcome,
> > 
> >         Best Regards,
> > 
> >         Markus
> > 
> > 
> > 
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