<div dir="ltr"><div><div><div><div>Dear Mohsin<br><br></div>Thank you for your reply I want to plot tephigram and I don't have direct model output of Dew point temperature. The tephigram script used these parameters<br>
<br><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
'set lev 1000 50'</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
'sndtemp = T-273.16'</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
'snddewp = TD-273.16'</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
'sndspd = mag(u,v)'</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
'snddir = 57.29578*(ATAN2(U,V))+180'</div><br><br></div>How can I find dew point temperature from 1000 to 50 hpa from 2m temperature.<br><br></div>Best Regards<br></div>Ahsan<br><div class="gmail_extra"><br><br><div class="gmail_quote">
On Fri, Aug 9, 2013 at 8:49 PM, Mohsen Soltani <span dir="ltr"><<a href="mailto:soltani.clima@gmail.com" target="_blank">soltani.clima@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"><div style="font-size:small;font-family:tahoma,sans-serif">Hi Ahsan,</div><div style="font-size:small;font-family:tahoma,sans-serif"><br>
</div><div style="font-size:small;font-family:tahoma,sans-serif">As far as I know, in order to calculate dewpoint temperature, you need to have both temperature and relative humidity variables of that particular level. You, however, may use the following functions to do so at 2 meters above the ground:</div>
<div style="font-size:small;font-family:tahoma,sans-serif"><br></div><div style="font-size:small;font-family:tahoma,sans-serif">**************************</div>
<div><div><font color="#000000" face="tahoma, sans-serif">tc2m = temperature 2m above ground</font><span style="font-family:tahoma,sans-serif"> [°C]</span></div>
<div><font color="#000000" face="tahoma, sans-serif">rh2m = relative humidity 2m above ground</font><span style="font-family:tahoma,sans-serif"> [%]</span></div>
<div><font color="#000000" face="tahoma, sans-serif"><br></font></div><div><div><font color="#000000" face="tahoma, sans-serif">'define dewp2m = tc2m-((14.55+0.114*tc2m)*(1-0.01*rh2m)+pow((2.5+0.007*tc2m)</font></div>
<div><font color="#000000" face="tahoma, sans-serif"> *(1-0.01*rh2m),3)+(15.9+0.117*tc2m)*pow((1-0.01*rh2m),14))'</font></div></div></div><div style="font-size:small;font-family:tahoma,sans-serif">
<br></div><div style="font-size:small;font-family:tahoma,sans-serif">***************************************</div><div style="font-size:small;font-family:tahoma,sans-serif">
<br></div><div style="font-size:small;font-family:tahoma,sans-serif">Good luck!</div><div style="font-size:small;font-family:tahoma,sans-serif">
Mohsen</div></div><div class="gmail_extra"><br clear="all"><div><div dir="ltr"><span><span style="font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif";color:#888888"></span></span><span><span dir="RTL" style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#888888" lang="AR-SA"><span></span></span></span>--<div>
<span style="font-size:12px;font-family:arial"><font color="#274e13">April showers bring May flowers!</font></span><br></div><div>--<font color="#b45f06"> <br>
<b>Mohsen Soltani, M.Sc.</b><br>Climatology Grad Student,<br>Department of Climatology, Faculty of Geography,</font></div><div><font color="#b45f06">University of Tehran, </font><span style="color:rgb(180,95,6)">Tehran, Iran</span></div>
<div><font color="#b45f06">voice: <a href="tel:%28%2B98%29%209119772934" value="+989119772934" target="_blank">(+98) 9119772934</a><br>e-mail</font><font color="#bf9000">:</font> <a href="mailto:soltani.clima@gmail.com" target="_blank">soltani.clima@gmail.com</a><br>
</div></div></div>
<br><br><div class="gmail_quote"><div><div class="h5">On Fri, Aug 9, 2013 at 7:46 AM, Syed Ahsan Ali <span dir="ltr"><<a href="mailto:ahsanshah01@gmail.com" target="_blank">ahsanshah01@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
<div dir="ltr"><div><div><div><div><br clear="all"></div>I want to calculate Dew point temprature from Relative humidity or Specific humidity.<br></div>Anyone know how to calculate within grads.<br></div>Thanks <br></div>
<span><font color="#888888">Ahsan<br>
<div><div><div><div><div><br>
</div></div></div></div></div></font></span></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Syed Ahsan Ali Bokhari <br>Electronic Engineer (EE)<div><br>Research & Development Division<br>Pakistan Meteorological Department H-8/4, Islamabad.<br>Phone # off +92518358714</div>
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