<div dir="ltr"><pre>A **guess**<br><br><a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/rtest.shtml" target="_blank">http://www.ncl.ucar.edu/<wbr>Document/Functions/Built-in/<wbr>rtest.shtml</a><br><br></pre><pre>uses<br></pre><pre><br> t = <i>r</i>*sqrt((<i>Nr</i>-2)/(1-<i>r^2</i>)<br></pre><pre>The key is estimating 'Nr' <br></pre><pre>Geophysical variables, generally, correlated in space <br>and time. The estimate of 'Nr' must take these issues into account.<br><br></pre><pre>Depending on the variable, the number of spatially <br>independent grid points may be significantly less than<br>the number of grid points.<br><br></pre><pre>Two papers:<br><br><a href="http://www.atmo.arizona.edu/students/courselinks/fall09/atmo529/Lectures/Livezey_Chen_1983.pdf">http://www.atmo.arizona.edu/students/courselinks/fall09/atmo529/Lectures/Livezey_Chen_1983.pdf</a><br> <a href="http://dx.doi.org/10.1175/1520-0442%281999%29012%3C1280:EOSDOF%3E2.0.CO;2">http://dx.doi.org/10.1175/1520-0442(1999)012<1280:EOSDOF>2.0.CO;2</a><br><br></pre><pre>You can do a google search for others.<br><br>====<br><br></pre><pre>Perhaps, you can use bootstrapping approach. You will have to <br></pre><pre>figue the correct approach on your own.<br></pre><pre><br></pre><pre><br></pre></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Nov 2, 2016 at 6:58 AM, Xi Chang <span dir="ltr"><<a href="mailto:xi.chang01@gmail.com" target="_blank">xi.chang01@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">Hallo,<div><br></div><div>Is there any way to perform a significant test for</div><div>a pattern correlation here <a href="http://www.ncl.ucar.edu/Document/Functions/Contributed/pattern_cor.shtml" target="_blank">http://www.ncl.ucar.edu/<wbr>Document/Functions/<wbr>Contributed/pattern_cor.shtml</a></div><div><br></div><div>Thank you</div><span class="HOEnZb"><font color="#888888"><div>Chang</div></font></span></div>
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