[ncl-talk] About wrf_user_intrp3d to get cross section of wind vector.

[Tao Lu]

Hello,

I want to get cross section of vertical wind vector.
We need this function to interpolate

	function wrf_user_intrp3d (
		var3d      : numeric,
		vert       : numeric,
		plot_type  : string,
		loc    [*] : numeric,  ; up to four values
		angle      : numeric,
		res    [1] : logical
	)

u_plane := wrf_user_intrp3d(u,z,"v",plane,angle,opts)
v_plane := wrf_user_intrp3d(v,z,"v",plane,angle,opts)
w_plane := wrf_user_intrp3d(w,z,"v",plane,angle,opts)

If I want to S-N section, i should set angle=0?
And make vector like this
vector = wrf_vector(a,wks,v_plane,w_plane,opts)?
[image: Inline image 1]
So here I have two questions:
1. Why should all of u_plane, v_plane, w_plane set the same angle?
2. When we make vector plot vector = wrf_vector(a,wks,v_plane,w_plane,opts):
   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.
   But I see some codes, they always use u_plane and w_plane whether they
do S-N or W-E plot. Why?

Waiting for your help,
Tao

-- 
******************************************************
盧 涛 (ル タオ) 修士課程2年

〒112-8551 東京都文京区春日1-13-27

中央大学理工学研究科都市環境学専攻

河川・水文研究室（山田正教授）


TEL: 03-3817-3406;   Phone: 070-2188-7509
Email1: hakufu.asano at gmail.com <mail%3Amet.yamos at gmail.com>
Email2: lutao at civil.chuo-u.ac.jp <mail%3Ayamoto at civil.chuo-u.ac.jp>
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******************************************************
Tao Lu    (M. Eng)
Laboratory of River Engineering and Hydrology,
Dept. of Civil and Environmental Engineering,
Graduate School of Science and Engineering,
Chuo University

1-13-27,Kasuga,Bunkyo-ku,Tokyo
112-8551, Japan
TEL: 03-3817-1805;   Phone: 070-2188-7509
Email1: hakufu.asano at gmail.com <mail%3Amet.yamos at gmail.com>
Email2: lutao at civil.chuo-u.ac.jp <mail%3Ayamoto at civil.chuo-u.ac.jp>
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