Re: Interpolate RUC13 data from hybrid coordinates to pressure levels?

There are no hybrid coefficients on the file. The lv_HYBL2

       integer lv_HYBL2 ( lv_HYBL2 )
          long_name : Hybrid level
          units : number

is just a number. However,

       float P_130_HYBL ( lv_HYBL2, gridx_130, gridy_130 )
          center : NOAA Forecast Systems Lab, Boulder CO
          long_name : Pressure
          units : Pa

can be used as the basis for interpolating to specified pressure levels.

---
http://www.ncl.ucar.edu/Document/Functions/Contributed/int2p_n_Wrap.shtml
    plvl   = (/.../)          ; Pa
    linlog =   ...            ; your choice
    p      = f->P_130_HYBL    ; (0,1,2)
    u      = f->UW_130_HYBL
    u_plvl = int2p_n_Wrap(p, u, plvl, linlog, 0)  ; v5.2.0
    printVarSummary(u_plvl)
---
You should upgrade your version of NCL  :-)
Good Luck
D
On 7/28/12 8:15 PM, Dragana Zovko Rajak wrote:
>
> Hi everyone,
>
> I have a question regarding vertical interpolation of RUC13 data.
>
> I want to convert data from RUC13 (GRIB file) that is in hybrid-b
> coordinates to pressure levels, and create plots similar to
> http://www.ncl.ucar.edu/Applications/Scripts/vert_1.ncl (horizontal plots).
> Eventually I also want to plot this data in a vertical cross-section,
> and I'm not sure how to interpolate data from hybrid levels to vertical
> plane.
>
> However, in order to properly use function vinth2p I need information
> about hybrid coefficients which my data does not have (or I can't locate
> them at least).
> I've attached ncl_filedump output for my RUC13 *.grb file for your
> reference.
>
> I would greatly appreciate any help with this as I've been trying to
> solve this problem for a while now and I wasn't able to get anything. I
> use NCL 5.2.0.
>
> Thanks very much in advance for your help,
>
> Dragana
>
>
>
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