<div dir="ltr"><div><div><div>Dear all,<br></div>The solution to this problem is running with the same "sf_urban_physics" option in all the domains (personal communication from J. Dudhia from NCAR).<br></div>All the best<br></div>Francisco <br><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Jan 17, 2016 at 12:45 AM, Mikhail Titov <span dir="ltr"><<a href="mailto:titovm@mail.com" target="_blank">titovm@mail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Verdana;font-size:12.0px"><div>
<div>Hi all,</div>
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<div>I definitely have the same problem with ARW WRFv3.7 using NOAH lsm and sf_urban_physics > 0.</div>
<div>Maybe WRF Help will help to clear up this questine?</div>
<div>By the way is there any experience in modelling WRF NMM with NOAH lsm to compare with other LSM models?</div>
<div>I will make several NMM runs with different LSM and will let all know if there is a serious difference</div>
<div>in the output variables and how about HGT (HZMAX, HSTDV).</div>
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<div>Dr M Titov (PhD - <a href="http://env.sc" target="_blank">env.sc</a>)</div>
<div>Research Professor (Physical Dep. MSU, KAUST) </div>
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<div style="margin:0 0 10px 0"><b>Sent:</b> Friday, January 15, 2016 at 9:06 AM<span class=""><br>
<b>From:</b> "Francisco Salamanca Palou" <<a href="mailto:fsalaman@asu.edu" target="_blank">fsalaman@asu.edu</a>><br>
</span><span class=""><b>To:</b> wrfhelp <<a href="mailto:wrfhelp@ucar.edu" target="_blank">wrfhelp@ucar.edu</a>>, "<a href="mailto:wrf-users@ucar.edu" target="_blank">wrf-users@ucar.edu</a>" <<a href="mailto:wrf-users@ucar.edu" target="_blank">wrf-users@ucar.edu</a>><br>
</span><b>Subject:</b> [Wrf-users] Nesting problem, HGT=0 in WRFV3.7 and WRFV3.7.1</div>
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<div>Dear WRF users,</div>
I have a notable problem using WRFV3.7 and WRFV3.7.1 with more than 2 nested domains (the simulations with only one domain are fine). I do not have this problem with previous versions of WRF using the same "namelist.input" and the same "met_em.d0*" files.<br>
When I am running the Noah-LSM with an urban module (i.e., sf_urban_physics = 1,2 or 3) the limits of the inner domain (see attached figure for 2 nested domains) have HGT =0 and this fact destroys the simulation producing unrealistic values for the wind speed, air temperature, etc.<br>
Curiously with the option sf_urban_physics =0 the simulation is fine.<br>
Other WRF's users (see Users forum "Nesting" section) have found the same problem.</div>
Any help/idea to solve this issue will be greatly appreciated.</div>
All the best</div>
Francisco
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