[ncl-talk] eta level to height conversion

[Dennis Shea]

This may be more appropriate for a WRF help forum.
==========================================
****Maybe***** ....

ZM = (PH+PHB)/9.8 - HGT    ; (m)
==========================================
PH(Time, bottom_top_stag, south_north, west_east)   ;  perturbation
geopotential" ; (m2 s-2)
PHB(Time, bottom_top_stag, south_north, west_east) ; base-state
geopotential; (m2 s-2)
HGT(Time, south_north, west_east)                              ;   Terrain
Height (m)

General eta information:
*https://glossary.ametsoc.org/wiki/Eta_vertical_coordinate*
<https://glossary.ametsoc.org/wiki/Eta_vertical_coordinate>
*https://collaboration.cmc.ec.gc.ca/cmc/cmoi/product_guide/docs/eta_info_doc_e.html*
<https://collaboration.cmc.ec.gc.ca/cmc/cmoi/product_guide/docs/eta_info_doc_e.html>

WRF Model V4:
* A Description of the  Advanced Research WRF Model Version 4
<https://www2.mmm.ucar.edu/wrf/users/docs/technote/v4_technote.pdf>*

WRF Support  (not NCL specific)
*  https://forum.mmm.ucar.edu/phpBB3/* <https://forum.mmm.ucar.edu/phpBB3/>

On Mon, Nov 15, 2021 at 1:10 AM ali mughal via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> Dear NCL users
>
> Can anyone guide me how to convert eta levels from WRF namelist input to
> heights in meters using NCL.
> Most of the NCL routines work with the WRF output files and using the z
> variable one can obtain the height in meters. But what if we want to test
> if eta levels are correct before running the WRF code.
> I would be grateful to all for guidance
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