That's a wide open question. Take your pick and start looking around. You'll need temperature data, three-dimensional wind components, and moisture variables (RH, dewpoint, mixing ratio etc) for at least 3 consecutive time frames.<br>
<br>Jeff<br><br><div class="gmail_quote">On Thu, Jan 24, 2013 at 2:03 PM, Brian Walsh <span dir="ltr"><<a href="mailto:brianw@provair.com" target="_blank">brianw@provair.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks Jeff.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Any idea what parameters I’d need to download and what the formula would look like? Would these parameters be available from the GFS (or similar) model?</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Brian</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"" lang="EN-US">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"" lang="EN-US"> <a href="mailto:gradsusr-bounces@gradsusr.org" target="_blank">gradsusr-bounces@gradsusr.org</a> [mailto:<a href="mailto:gradsusr-bounces@gradsusr.org" target="_blank">gradsusr-bounces@gradsusr.org</a>]
<b>On Behalf Of </b>Jeff Duda<br>
<b>Sent:</b> January-24-13 4:27 PM<br>
<b>To:</b> GrADS Users Forum<br>
<b>Subject:</b> Re: [gradsusr] Solar Radiation</span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hey Brian,<br>
I bet you could estimate radiation as a residual from the thermodynamic equation. You could estimate the local change, the advection, the molecular diffusion, and the latent heating from water phase changes which only leaves radiation as the other major term
(making assumptions about the scale of the features you are examining, of course). Then combine those and assume that whatever is left over is due to radiation. Then I think you would multiply by air_density*Cp to get a radiation value in W/m^2.<br>
<br>
Jeff Duda</p>
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<p class="MsoNormal">On Thu, Jan 24, 2013 at 1:40 PM, Brian Walsh <<a href="mailto:brianw@provair.com" target="_blank">brianw@provair.com</a>> wrote:</p>
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<p class="MsoNormal">Hello,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Are there any models which output the amount of daily solar radiation (whether NWP or reanalysis model)? Or, is there a way of determining this from existing variables?</p>
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<p class="MsoNormal">Thanks in advance.</p>
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<p class="MsoNormal">Brian</p>
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University of Oklahoma School of Meteorology<br>
Center for Analysis and Prediction of Storms</p>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Jeff Duda<br>Graduate research assistant<br>University of Oklahoma School of Meteorology<br>Center for Analysis and Prediction of Storms<br>