<div dir="ltr">Hi Scott,<div><br></div><div>My first guess is that the vertical levels for interpolation are too large (not your fault). The interpolation algorithm automatically chooses vertical levels at .01*z_max. In your case z_max is 20251.8 m, which means your interpolation levels are at 202.5 m per grid box. This is probably too large for what you're interested in looking at. <br></div><div><br></div><div>As a first attempt to fix, let's edit your WRFUserARW.ncl.</div><div><br></div><div>At line 383, change this:</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<p class="gmail-p1" style="margin:0px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Monaco"><span class="gmail-s1" style="text-decoration:underline">dz</span> = 0.01 * z_max</p></blockquote><div><br></div><div>to this:</div><div><br></div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-s1" style="font-family:Monaco;font-size:11px;text-decoration:underline">dz</span><span style="font-family:Monaco;font-size:11px"> = 0.0025 * z_max</span></blockquote><div> </div><div>If this doesn't help your situation, I'll need to dig in to this a bit more.</div><div><br></div><div>Hope this helps,</div><div><br></div><div>Bill</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 18, 2018 at 3:04 PM, Scott Capps via ncl-talk <span dir="ltr"><<a href="mailto:ncl-talk@ucar.edu" target="_blank">ncl-talk@ucar.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Greetings,<div><br></div><div>I have some questions about the cross-section plots from WRF output. I basically started from the example scripts at: <a href="http://www2.mmm.ucar.edu/wrf/OnLineTutorial/Graphics/NCL/Examples/CROSS_SECTION/wrf_CrossSection_smooth4.htm" target="_blank">http://www2.mmm.ucar.edu/<wbr>wrf/OnLineTutorial/Graphics/<wbr>NCL/Examples/CROSS_SECTION/<wbr>wrf_CrossSection_smooth4.htm</a></div><div><br></div><div>The whitespace along the terrain height is much too large and the terrain is too coarse (this is a 667m resolution WRF run) or the lowest level atmospheric data is not being contoured correctly. The cross-section plotting routine in GRaDs seems to show true the resolution of terrain and terrain following data. Is there a way to improve this in NCL?</div><div><br></div><div>I have attached some code (cross_sxn_plot_test.ncl and modified WRFUserARW.ncl) and have ftp'd an example wrfout file to the incoming directory as: wrfout_d05_2017-10-09_00:00:<a href="http://00.nc" target="_blank">00<wbr>.nc</a></div><div><br></div><div><br></div><div>NCL v6.3.0</div><div><a href="http://www2.mmm.ucar.edu/wrf/OnLineTutorial/Graphics/NCL/Examples/CROSS_SECTION/wrf_CrossSection_smooth4.htm" target="_blank">http://www2.mmm.ucar.edu/wrf/<wbr>OnLineTutorial/Graphics/NCL/<wbr>Examples/CROSS_SECTION/wrf_<wbr>CrossSection_smooth4.htm</a><span class="HOEnZb"><font color="#888888"><br clear="all"><div><br></div>-- <br><div class="m_8360096949610619015gmail_signature"><div dir="ltr"><div><div dir="ltr"><b><font size="4">Scott Capps</font></b><div>Principal</div><div><a href="http://www.atmosphericdatasolutions.com" target="_blank">Atmospheric Data Solutions</a></div><div><a href="mailto:scapps@atmosdatasolutions.com" target="_blank">scapps@atmosdatasolutions.com</a><div>cell: <a href="tel:(949)%20910-4385" value="+19499104385" target="_blank">(949) 910-4385</a></div><div><br></div></div></div></div></div></div>
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