<div dir="ltr"><div>This may be more appropriate for a WRF help forum.</div><div>==========================================<br></div><div>****Maybe***** ....<br></div><div><br></div><div>ZM = (PH+PHB)/9.8 - HGT    ; (m)<br></div><div>==========================================<br></div><div>PH(Time, bottom_top_stag, south_north, west_east)   ;  perturbation geopotential" ; (m2 s-2)<br>PHB(Time, bottom_top_stag, south_north, west_east) ; base-state geopotential; (m2 s-2) </div><div>HGT(Time, south_north, west_east)                              ;   Terrain Height (m)<br></div><div><br></div><div>General eta information:</div><div><a href="https://glossary.ametsoc.org/wiki/Eta_vertical_coordinate" target="_blank"><b>https://glossary.ametsoc.org/wiki/Eta_vertical_coordinate</b></a></div><div><a href="https://collaboration.cmc.ec.gc.ca/cmc/cmoi/product_guide/docs/eta_info_doc_e.html" target="_blank"><b>https://collaboration.cmc.ec.gc.ca/cmc/cmoi/product_guide/docs/eta_info_doc_e.html</b></a></div><div><br></div><div>WRF Model V4:</div><div><b> <a href="https://www2.mmm.ucar.edu/wrf/users/docs/technote/v4_technote.pdf" target="_blank">A Description of the  Advanced Research WRF Model Version 4</a></b></div><div><br></div><div>WRF Support  (not NCL specific)<br></div><div><a href="https://forum.mmm.ucar.edu/phpBB3/" target="_blank"><b>  https://forum.mmm.ucar.edu/phpBB3/</b></a></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 15, 2021 at 1:10 AM ali mughal via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Dear NCL users<div><br></div><div>Can anyone guide me how to convert eta levels from WRF namelist input to heights in meters using NCL. </div><div>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. </div><div>I would be grateful to all for guidance</div></div>
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