<div dir="ltr">Hi Tao,<div><br></div><div>When you do a vertical cross section, you are defining a line along the surface and the algorithm interpolates to a vertical plane along that line. The line on the surface can be defined by using a start point and an end point, or a pivot point and an angle. So, if you are using the pivot point and angle, to define a S-N cross section through the entire domain, you want to set the pivot point to the center of the domain and the angle to be 0.0. To define a W-E cross section through the entire domain, you would set the pivot point to the center of the domain and the angle to be 90.0.</div><div><br></div><div>1) If you don't provide the same cross-section line to all three wind components, you won't be using the same cross-section, which is going to be nonsensical. <br></div><div><br></div><div>2) I think you may be misunderstanding what this function is doing. This algorithm doesn't find the wind components aligned with the orientation of the cross section, it simply goes point by point along the line at the surface, and for a fixed number of vertical points determines the value at these points by doing a linear interpolation in the vertical. The u_plane component is still the west_east component, the v_plane component is still the south_north component, and the w_plane component is still the bottom_top component. </div><div><br></div><div>Hope this helps,</div><div><br></div><div>Bill</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Feb 13, 2017 at 1:44 AM, Tao Lu <span dir="ltr"><<a href="mailto:hakufu.asano@gmail.com" target="_blank">hakufu.asano@gmail.com</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">Hello,<div><br></div><div>I want to get cross section of vertical wind vector.<br clear="all"><div>We need this function to interpolate </div><div><pre style="margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;font-family:courier;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"> function wrf_user_intrp3d (
var3d : numeric,
vert : numeric,
plot_type : string,
loc [*] : numeric, ; up to four values
angle : numeric,
res [1] : logical
)</pre>u_plane := wrf_user_intrp3d(u,z,"v",<wbr>plane,angle,opts)</div><div>v_plane := wrf_user_intrp3d(v,z,"v",<wbr>plane,angle,opts)<br></div><div>w_plane := wrf_user_intrp3d(w,z,"v",<wbr>plane,angle,opts)<br></div><div><br></div><div>If I want to S-N section, i should set angle=0?</div><div>And make vector like this</div><div>vector = wrf_vector(a,wks,v_plane,w_<wbr>plane,opts)?</div><div><img src="cid:ii_15a369bb8bf1fc35" alt="Inline image 1" width="472" height="472"><br></div><div>So here I have two questions:</div><div><font size="1">1. Why should all of u_plane, v_plane, w_plane set the same angle? </font></div><div><font size="1">2. When we make vector plot vector = wrf_vector(a,wks,v_plane,w_<wbr>plane,opts):</font></div><div><font size="1"> In my opinion, if you want S-N plane vector you should use v_plane and w_plane. If you want W-E, you should use u_plane and w_plane.</font></div><div><font size="1"> But I see some codes, they always use u_plane and w_plane whether they do S-N or W-E plot. Why?</font></div><div><br></div>Waiting for your help,</div><div>Tao<br><div><br></div>-- <br><div class="m_1625441732095348876gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div style="font-size:12.8px"><span style="font-size:12.8px">******************************<wbr>************************</span><br></div><div style="font-size:12.8px"><span style="font-size:12.8px">盧 涛 (ル タオ) </span><span style="font-family:arial,helvetica,sans-serif;font-size:small">修士課程2年</span><br style="font-size:12.8px"><p style="font-size:12.8px;margin:0px"><font size="2" face="arial, helvetica, sans-serif">〒<span lang="EN-US">112-8551 </span>東京都文京区春日<span lang="EN-US">1-13-27</span></font></p><p style="font-size:12.8px;margin:0px"><font size="2" face="arial, helvetica, sans-serif">中央大学理工学研究科都市環境学専攻</font></p><p style="font-size:12.8px;margin:0px"><font size="2" face="arial, helvetica, sans-serif">河川・水文<span lang="EN-US"><span lang="EN-US"><span lang="EN-US">研究</span></span><span lang="EN-US"><span lang="EN-US">室</span></span></span></font><span style="font-family:arial,helvetica,sans-serif;font-size:small">（山田正教授）</span></p></div><div style="font-size:12.8px"><p style="font-size:12.8px;margin:0px"><font size="2" face="arial, helvetica, sans-serif"><span lang="EN-US"><br></span></font></p><p style="font-size:12.8px;margin:0px"><font size="2" face="arial, helvetica, sans-serif"><span lang="EN-US">TEL: 03-3817-3406; </span></font><span style="font-family:arial,helvetica,sans-serif;font-size:small">Phone: 070-2188-7509</span></p>Email1: <a href="mailto:mail%3Amet.yamos@gmail.com" style="color:rgb(17,85,204);font-size:12.8px" target="_blank">hakufu.asano@gmail.com</a><br style="font-size:12.8px">Email2: <a href="mailto:mail%3Ayamoto@civil.chuo-u.ac.jp" style="color:rgb(17,85,204);font-size:12.8px" target="_blank">lutao@civil.chuo-u.ac.<wbr>jp</a><br style="font-size:12.8px"><span style="font-size:12.8px">******************************<wbr>*************************</span></div><div style="font-size:12.8px"><span style="font-size:small;font-family:arial">******************************</span><span style="font-size:small;font-family:arial"><wbr>************************</span><br></div><div><span style="font-size:small;font-family:arial">Tao Lu (M. Eng)</span></div><div><span style="font-family:arial,helvetica,sans-serif;font-size:12.8px">Laboratory of River Engineering and Hydrology,</span><br style="font-family:arial;font-size:small"><span style="font-size:small;font-family:arial">Dept. of Civil and Environmental Engineering,</span><br style="font-family:arial;font-size:small"><span style="font-family:arial,helvetica,sans-serif;font-size:12.8px">Graduate School of Science and Engineering,</span><br style="font-family:arial;font-size:small"><span style="font-size:small;font-family:arial">Chuo University</span><br style="font-family:arial;font-size:small"><span style="font-size:small;font-family:arial"> </span><br style="font-family:arial;font-size:small">1-13-27<span style="font-size:small;font-family:arial">,Kasuga,Bunkyo-ku,Tokyo</span><br style="font-family:arial;font-size:small"><span style="font-size:small;font-family:arial">112-8551, Japan</span><br style="font-family:arial;font-size:small"><span style="font-size:small;font-family:arial">TEL: </span>03-3817-1805<font size="2" face="arial, helvetica, sans-serif"><span lang="EN-US">; </span></font><span style="font-family:arial,helvetica,sans-serif;font-size:small">Phone: 070-2188-7509</span><br style="font-family:arial;font-size:small"><span style="font-size:12.8px">Email1: </span><a href="mailto:mail%3Amet.yamos@gmail.com" style="font-size:12.8px;color:rgb(17,85,204)" target="_blank">hakufu.asano@gmail.com</a><br style="font-size:12.8px"><span style="font-size:12.8px">Email2: </span><a href="mailto:mail%3Ayamoto@civil.chuo-u.ac.jp" style="font-size:12.8px;color:rgb(17,85,204)" target="_blank">lutao@civil.chuo-u.ac.<wbr>jp</a><br style="font-family:arial;font-size:small"><span style="font-size:small;font-family:arial">******************************</span><span style="font-size:small;font-family:arial"><wbr>***********************</span><span style="font-size:12.8px"><br></span></div></div></div></div></div></div></div></div></div></div></div></div></div>
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