<div dir="ltr">You're welcome. Feel free to share it.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Aug 17, 2021 at 8:53 PM Tianhang Zhang <<a href="mailto:tianhang.zhang@postgrad.manchester.ac.uk">tianhang.zhang@postgrad.manchester.ac.uk</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">
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<div>THank you very much!</div>
<div dir="ltr">It is very useful for me!</div>
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<div dir="ltr">Best,</div>
<div dir="ltr">Tianhang</div>
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<div id="gmail-m_-7503309173953355261divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>发件人:</b> Barry Lynn <<a href="mailto:barry.h.lynn@gmail.com" target="_blank">barry.h.lynn@gmail.com</a>><br>
<b>发送时间:</b> Tuesday, August 17, 2021 3:50:15 PM<br>
<b>收件人:</b> Dennis Shea <<a href="mailto:shea@ucar.edu" target="_blank">shea@ucar.edu</a>><br>
<b>抄送:</b> Tianhang Zhang <<a href="mailto:tianhang.zhang@postgrad.manchester.ac.uk" target="_blank">tianhang.zhang@postgrad.manchester.ac.uk</a>>; <a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a> <<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a>><br>
<b>主题:</b> Re: [ncl-talk] about frontogenesis</font>
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<div dir="ltr">Hello:
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<div>Sorry for not responding earlier -- I was travelling.</div>
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<div>Here is an example program where I calculated frontogenesis. I obtained it from someone else, who I can't recall at the moment. I modified it a bit.</div>
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<div>Perhaps this will help you?</div>
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<div dir="ltr">On Mon, Aug 9, 2021 at 12:59 AM Dennis Shea via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a>> wrote:<br>
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<div>NCL does not have an explicit '<b>frontogenesis</b>' function.</div>
<div>Certainly, one could be written but, as far as I know, nobody has done this.<br>
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<div>NCL does have <b>'<a href="https://www.ncl.ucar.edu/Document/Functions/Contributed/qvector_isobaric.shtml" target="_blank">qvector_isobaric</a></b>' and a variant '<a href="https://www.ncl.ucar.edu/Document/Functions/Contributed/qvector_isobaric_cfd.shtml" target="_blank"><b>qvector_isobaric_cfd</b></a>'
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<div>Q-vectors can be used to understand physical processes such as vertical motion and frontogenesis.</div>
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<div>However, NCL's functions are for global grids and the needed terms are calculated using spherical harmonics.
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<div>These <b>can not</b> be used for WRF grids.</div>
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<div>Perhaps, the WRF community can offer some assistance.</div>
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<div dir="ltr">On Sun, Aug 8, 2021 at 3:09 PM Tianhang Zhang via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a>> wrote:<br>
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<span style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">Hi, </span>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">I would like to know how to use NCL to calculate frontogenesis using wrf data. Do you have any scripts? </div>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">Thank you</div>
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<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">Best, </div>
<span style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">Tianhang</span><br>
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<div dir="ltr">Barry H. Lynn, Ph.D
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><br></div><div dir="ltr">Barry H. Lynn, Ph.D<div><div>Senior Assoc<font color="#000000">iate Scientist, Lecturer,</font></div><div><div><font color="#000000">The Institute of the Earth Science, <br>The Hebrew University of Jerusalem, <br>Givat Ram, Jerusalem 91904, Israel <br></font></div><font color="#000000">Tel: 972 547 231 170<br>Fax: (972)-25662581</font></div></div><div><span style="color:rgb(136,136,136)"><br></span></div><div>Weather It Is, LTD<br>Weather and Climate Focus<br><a href="http://weather-it-is.com" target="_blank">https://weather-it-is.com</a><br>Jerusalem, Israel<br>Local: 02 930 9525<br>Cell: 054 7 231 170<br>Int-IS: x972 2 930 9525<br><br></div></div></div></div></div>