[ncl-talk] Any non global function calculation for stream function?

[谢瑾博]

Hi Dennis,
 I have read this over, and I find in the first task, that you recommended using poisson solver. My case is an ideal case where the flow goes over an 2D ideal mountain, where I think the mountain is small compared the lateral distance in the domain. In this case, is an infinite small kesi (stream function) appropriate as the boundary condition in the two sides?
yours,
Jinbo


-----原始邮件-----
发件人:"Dennis Shea" <shea at ucar.edu>
发送时间:2019-07-28 01:32:54 (星期日)
收件人: "谢瑾博" <xiejinbo at mail.iap.ac.cn>
抄送: Ncl-talk <ncl-talk at ucar.edu>
主题: Re: [ncl-talk] Any non global function calculation for stream function?




NCL does not have a function that computes stream function on a limited area [regional] grid.
The calculation of stream function and velocity potential with a regional domain is non-trivial.

==============

This question has been asked several times in the past.  For example:

https://www.ncl.ucar.edu/Support/talk_archives/all/1413.html


Perhaps, the code [?fortran?] used in the following could be found:


Computation of the Streamfunction and Velocity Potential for Limited and Irregular Domains
Monthly Weather Review 134(11):3384-3394 · November 2006 


=====================

Miscellaneous: non-NCL


http://pordlabs.ucsd.edu/matlab/stream.htm


Good Luck



On Sat, Jul 27, 2019 at 9:24 AM 谢瑾博 via ncl-talk <ncl-talk at ucar.edu> wrote:

Dear Collegues,
I have been trying to calculate the stream function reversing from a know u and v in a small domain on Mercator using wrf. However, using uv2sfvpF or uv2sfvpf does not get the results since they require global grid. Is there any availible functions to calculate stream functions in small domains in NCL?
yours,
Jinbo 

--

Dr. Jinbo Xie
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG)
Institute of Atmospheric Physics,Chinese Academy of Sciences 
e-mail: xiejinbo at mail.iap.ac.cn
Tel:86-10-8299-5419（o）
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--

Dr. Jinbo Xie
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG)
Institute of Atmospheric Physics,Chinese Academy of Sciences 
e-mail: xiejinbo at mail.iap.ac.cn
Tel:86-10-8299-5419（o）
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