<div dir="ltr">Hi Satareh,<div>The first rule of data processing is to examine the data you wish to analyze. Specifically, what type of grid is the data on, what are the units, what type is the data, etc. In this case, the Xie-Arkin test data (<a href="http://www.ncl.ucar.edu/Applications/Data/cdf/xieArkin-T42.nc">available here</a>) has precipitation in units of mm/day. The ESRL/PSD dataset has units in terms of monthly total of precipitation in mm. Thus, you will have to convert one dataset or the other to directly compare them. </div><div>Adam </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Aug 13, 2019 at 9:00 AM Setareh Rahimi via ncl-talk <<a href="mailto:ncl-talk@ucar.edu">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"><div dir="ltr"><font size="4">Dear all,</font><div><br clear="all"><div><font size="4">Regarding <span style="background-color:rgb(244,204,204)"><a href="https://www.ncl.ucar.edu/Applications/Scripts/climo_3.ncl" style="margin:0px;padding:0px;text-decoration-line:none;color:rgb(133,45,133);font-family:verdana,sans-serif;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial" target="_blank">climo_3.ncl</a> </span>(available on <a href="https://www.ncl.ucar.edu/Applications/climo.shtml" target="_blank">https://www.ncl.ucar.edu/Applications/climo.shtml</a> ), once I just only change the type of data set (<font face="arial, sans-serif">using <span style="font-variant-ligatures:no-common-ligatures;color:rgb(0,0,0)"><a href="http://precip.mon.total.v2018.nc" target="_blank">precip.mon.total.v2018.nc</a>, available </span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(0,0,0)">on </span><a href="https://www.esrl.noaa.gov/psd/data/gridded/data.gpcc.html" target="_blank">https://www.esrl.noaa.gov/psd/data/gridded/data.gpcc.html</a>), I get something weird, almost everywhere receives more than 10mm precipitation. It is not reasonable. Why did this happen? Please kindly guide me in this regard. The script and images have been attached.</font></font></div><div><font size="4"><font face="arial, sans-serif">Best wishes,</font></font></div><div><font size="4">-- </font></div>





<div dir="ltr" class="gmail-m_-7490676310992423966gmail_signature"><font size="4">S.Rahimi</font><br><br></div></div></div>
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