<div dir="ltr">Similar to kf_filter, the wkSpaceTime function assumes that the data are cyclic in the zonal direction. Unfortunately, you will probably have to do this manually using <a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/fft2df.shtml">fft2df</a> and <a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/fft2db.shtml">fft2db</a>. <div><br></div><div>We have received similar questions before, so please share if you do write a function. It would be a good addition to NCL.</div><div><br></div><div>Carl</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Mar 4, 2018 at 10:02 PM, Wickramage Chathurika <span dir="ltr"><<a href="mailto:wickramagechathurika@rocketmail.com" target="_blank">wickramagechathurika@rocketmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div>Hello All,</div><div><br></div><div><br></div><div>I want to filter Kelvin and Rossby waves in the ocean like which has done using wkSpaceTime. But I cannot understand clearly how it is working and how to apply each and every argument properly. specially;</div><div><pre style="margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><font face="verdana, helvetica, sans-serif"><b><br></b></font></pre><pre style="margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><pre style="margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><b><font face="times new roman, new york, times, serif">nDayWin:Wheeler-Kiladis [WK] temporal window length (days)</font></b></pre><pre style="margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><b><font face="times new roman, new york, times, serif">nDaySkip:time (days) between temporal windows [segments]</font></b></pre><pre style="margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><b><font face="times new roman, new york, times, serif">kMin /kMax:Range of wavenumbers, can be positive (eastward) or negative (westward) in kf_filter function</font></b></pre></pre><pre style="margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><pre style="margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><div style="margin:10px 0px 20px;padding:0px;color:rgb(51,51,51);font-size:13.3333px;line-height:12pt"><font face="times new roman, new york, times, serif"><span style="color:rgb(0,0,0)">I am really appriciate if anyone can give an example for ocean Rossby and Kelvin wave filtering. </span></font></div><div style="margin:10px 0px 20px;padding:0px;color:rgb(51,51,51);font-size:13.3333px;line-height:12pt"><font face="times new roman, new york, times, serif"><span style="color:rgb(0,0,0)"><br></span></font></div><div style="margin:10px 0px 20px;padding:0px;color:rgb(51,51,51);font-size:13.3333px;line-height:12pt"><font face="times new roman, new york, times, serif"><span style="color:rgb(0,0,0)">Thank you so much</span></font></div><div style="margin:10px 0px 20px;padding:0px;color:rgb(51,51,51);font-size:13.3333px;line-height:12pt"><font face="times new roman, new york, times, serif"><span style="color:rgb(0,0,0)">Kind regards,</span></font></div><div style="margin:10px 0px 20px;padding:0px;color:rgb(51,51,51);font-size:13.3333px;line-height:12pt"><font face="times new roman, new york, times, serif"><span style="color:rgb(0,0,0)">Chathu</span></font></div></pre><font face="courier"><br></font></pre><br></div></div></div><br>______________________________<wbr>_________________<br>
ncl-talk mailing list<br>
<a href="mailto:ncl-talk@ucar.edu">ncl-talk@ucar.edu</a><br>
List instructions, subscriber options, unsubscribe:<br>
<a href="http://mailman.ucar.edu/mailman/listinfo/ncl-talk" rel="noreferrer" target="_blank">http://mailman.ucar.edu/<wbr>mailman/listinfo/ncl-talk</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><br><table border="0" cellpadding="2" cellspacing="2" style="background-color:transparent;max-width:100%;border-collapse:collapse;color:rgb(51,51,51);font-size:14px;border:3px solid rgb(170,170,170);font-family:Times;line-height:12px"><tbody><tr><td align="center" height="71" width="71"><span style="font-size:11px"><span style="font-family:arial,helvetica,sans-serif"><a href="https://ncics.org/" style="color:rgb(17,85,204)" target="_blank"><img src="https://ncics.org/ncics/img/NCICS_logo-131x131.png"></a></span></span></td><td valign="top"><span style="font-size:11px"><span style="font-family:arial,helvetica,sans-serif"><b>Carl J. Schreck III, PhD</b><br></span></span><span style="font-size:11px"><span style="font-family:arial,helvetica,sans-serif"><b>Research Scholar</b></span></span><span style="font-size:11px"><span style="font-family:arial,helvetica,sans-serif"><br></span></span><span style="font-size:11px"><span style="font-family:arial,helvetica,sans-serif"><a href="http://ncsu.edu/" style="color:rgb(38,58,143);font-weight:bold" target="_blank">North Carolina State University</a><br></span></span><a href="https://ncics.org/" style="color:rgb(38,58,143);font-family:arial,helvetica,sans-serif;font-size:11px;font-weight:bold" target="_blank">North Carolina Institute for Climate Studies (NCICS)</a><br style="font-family:arial,helvetica,sans-serif;font-size:11px"><span style="font-size:11px"><span style="font-family:arial,helvetica,sans-serif">151 Patton Ave, Asheville, NC 28801<br>e: </span></span><a href="mailto:cjschrec@ncsu.edu" style="color:rgb(38,58,143);font-family:arial,helvetica,sans-serif;font-size:11px;font-weight:bold" target="_blank">cjschrec@ncsu.edu</a><br style="font-family:arial,helvetica,sans-serif;font-size:11px"><span style="font-size:11px"><span style="font-family:arial,helvetica,sans-serif">o: <a href="tel:(828)%20257-3140" value="+18282573140" style="color:rgb(17,85,204)" target="_blank">+1 828 257 3140</a><br></span></span><span style="font-family:arial,helvetica,sans-serif;font-size:11px">c: <a href="tel:(828)%20484-1702" value="+18284841702" style="color:rgb(17,85,204)" target="_blank">+1 828 484 1702</a><br></span><a href="http://scholar.google.com/citations?hl=en&user=th8ONEcAAAAJ&view_op=list_works&sortby=pubdate" style="color:rgb(38,58,143);font-family:arial,helvetica,sans-serif;font-size:11px;font-weight:bold" target="_blank">Publications</a><br><a href="https://ncics.org/mjo/" style="color:rgb(38,58,143);font-family:arial,helvetica,sans-serif;font-size:11px;font-weight:bold" target="_blank">ncics.org/mjo</a><br><a href="https://www.cyclonecenter.org/" style="color:rgb(38,58,143);font-family:arial,helvetica,sans-serif;font-size:11px;font-weight:bold" target="_blank">CycloneCenter.org</a><br></td></tr></tbody></table></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
</div>