Hi,<div><br></div><div>Thank you for the message. The time step is 1 sec right now. Can I decrease it more?</div><div><br></div><div>Ehsan</div><div><br><div class="gmail_quote">On Tue, Feb 14, 2012 at 3:06 AM, Agnes Mika <span dir="ltr"><<a href="mailto:agnes.mika@bmtargoss.com">agnes.mika@bmtargoss.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hallo Ehsan,<br>
<div class="im"><br>
Ehsan wrote:<br>
> >> I want to use NOAH scheme in idealized 2hill case. One of my fiend did it<br>
> >> for WRF v2.2. I modified my friend's code for WRF v3.3. While there is no<br>
> >> error in compilation and running ideal.exe, but after running wrf.exe this<br>
> >> error appears and program stops running:<br>
> ><br>
> >> forrtl: severe (174): SIGSEGV, segmentation fault occurred<br>
><br>
</div><div class="im">> Flerchinger USEd in NEW version. Iterations= 10<br>
> d01 2007-03-21_06:00:00 89 points exceeded cfl=2 in domain d01<br>
<br>
</div>The error message says that 1.) there is a violation of the CFL<br>
criterium (the model becomes unstable) and 2.) the solution for the<br>
Flerchinger equation in the NOAH scheme does not converge within 10<br>
iteration steps. This usually happens when soil temperatures are below<br>
0 deg C.<br>
<br>
Reducing your timestep should help with both problems.<br>
<br>
Good luck,<br>
Agnes<br>
<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><span style="font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)"><div><div style="font-family:arial;font-size:small"><span style="font-size:13px;font-family:arial,sans-serif"><div>
<div style="font-family:arial;font-size:small"><span style="font-size:13px;font-family:arial,sans-serif"><div>Ehsan Erfani</div></span><span style="font-size:13px;font-family:arial,sans-serif">PhD Student, </span><span style="font-family:arial,sans-serif;font-size:13px">Teaching and </span><span style="font-family:arial,sans-serif;font-size:13px">Research Assistant</span></div>
<div style="font-family:arial;font-size:small"><span style="font-size:13px;font-family:arial,sans-serif">Atmospheric Sciences<br></span><div><span style="font-size:13px;font-family:arial,sans-serif">University of Virginia</span></div>
</div></div></span></div></div></span><div><div><div></div></div></div><br>
</div>