<div dir="ltr"><div><div><br></div><div>NCL does <b>not </b>have a function that computes stream function on a limited area [regional] grid.</div><div>The calculation of stream function and velocity potential with a regional domain is non-trivial.<br></div><div>==============<br></div></div><div>This question has been asked several times in the past.  For example: <br></div><div><a href="https://www.ncl.ucar.edu/Support/talk_archives/all/1413.html"><b>https://www.ncl.ucar.edu/Support/talk_archives/all/1413.html</b></a></div><br><div><b></b><div>Perhaps, the code [?fortran?] used in the following could be found:</div><div><br></div><div><a href="https://journals.ametsoc.org/doi/full/10.1175/MWR3249.1" target="_blank"><b>Computation of the Streamfunction and Velocity Potential for Limited and Irregular Domains</b></a></div><div><span>Monthly Weather Review 134(11):3384-3394</span><span> · November 2006</span> </div><div><br></div><div>=====================<br></div><div>Miscellaneous: non-NCL</div><div><br></div><div><a href="http://pordlabs.ucsd.edu/matlab/stream.htm"><b>http://pordlabs.ucsd.edu/matlab/stream.htm</b></a></div><div><br></div><div><b>Good Luck</b><br> </div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jul 27, 2019 at 9:24 AM 谢瑾博 via ncl-talk <<a href="mailto:ncl-talk@ucar.edu" target="_blank">ncl-talk@ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear Collegues,<div><span style="white-space:pre-wrap">     </span>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 <a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/uv2sfvpF-1.shtml" style="margin:0px;padding:0px;color:rgb(133,45,133);font-family:verdana,sans-serif;font-size:13.3333px" target="_blank">uv2sfvpF</a> or <a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/uv2sfvpF-1.shtml" style="margin:0px;padding:0px;color:rgb(133,45,133);font-family:verdana,sans-serif;font-size:13.3333px" target="_blank">uv2sfvp</a>f does not get the results since they require global grid. Is there any availible functions to calculate stream functions in small domains in NCL?</div><div><span style="white-space:pre-wrap">     </span>yours,</div><div><span style="white-space:pre-wrap">           </span>Jinbo <br><br><span>--<br><div style="font-family:tahoma,verdana,arial,helvetica,sans-serif"><span style="font-family:Arial;white-space:pre-wrap;line-height:22px;background-color:rgb(255,252,246)">Dr</span><span style="font-family:"lucida Grande",Verdana;line-height:23px">. Jinbo Xie</span></div><div><span style="line-height:23px"><font face="lucida Grande, Verdana">State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG)</font></span></div><div style="font-family:tahoma,verdana,arial,helvetica,sans-serif"><font face="'lucida Grande', Verdana"><span style="line-height:23px">Institute of Atmospheric Physics,Chinese Academy of Sciences </span></font></div><div style="font-family:tahoma,verdana,arial,helvetica,sans-serif"><span style="font-family:"lucida Grande",Verdana;line-height:23px">e-mail: <a href="mailto:xiejinbo@mail.iap.ac.cn" target="_blank">xiejinbo@mail.iap.ac.cn</a></span></div><div id="gmail-m_-3342341624692306227gmail-m_-3978749341721629772aeaoofnhgocdbnbeljkmbjdmhbcokfdb-mousedown" style="font-family:tahoma,verdana,arial,helvetica,sans-serif"><span style="font-family:"lucida Grande",Verdana;line-height:23px">Tel:86-10-8299-5419（o）</span></div></span></div>_______________________________________________<br>
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