<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000'>Dear Sun Jia,<div><br></div><div>You need sea level pressure, which is not provided in the raw WRF output. You can get SLP by post-processing the data (e.g. using ARWpost or NCL). The sum of P and PB gives the pressure on model levels, which is strongly influenced by surface terrain.</div><div><br></div><div>Best regards,<br><br><div><span name="x"></span>Eric L. Altshuler<br>Research Scientist<br>Center for Ocean-Land-Atmosphere Studies<br>253 Research Hall, Mail Stop 6C5<div>George Mason University</div><div>4400 University Drive<br>Fairfax, VA 22030 USA<br><br>E-mail: ela@cola.iges.org<br>Phone: (703) 993-5725<br>Fax: (703) 993-5770</div><span name="x"></span><br></div><br><hr id="zwchr"><b>From: </b>"孙佳" <sunjiaouc@sina.com><br><b>To: </b>"wrf-users" <wrf-users@ucar.edu><br><b>Sent: </b>Tuesday, August 20, 2013 10:07:34 AM<br><b>Subject: </b>[Wrf-users] About how to get typhoon center and its pressure<br><br>
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<div><font size="2" face="Verdana">Dear All,</font></div>
<div style="TEXT-INDENT: 2em">I am trying to simulate a tropical cyclone process
by runing WRF model(Version3.5), and finally get a not that bad result. But when
I want to get the center and its minimum pressure, I met the problem.</div>
<div style="TEXT-INDENT: 2em"> </div>
<div style="TEXT-INDENT: 2em">In "wrfout*" files, variables "P" and "PB" is
"perturbation pressure" and "base pressure" respectively. The contour of PB
on land is extremely lower than 1013hPa, and I think it's caused
by a higher terrain on land. So this is my problem, how can I get the
center of a typhoon and get its minimum pressure excluding the impact of the
terrain?</div>
<div style="TEXT-INDENT: 2em"> </div>
<div style="TEXT-INDENT: 2em">Thank you so much for your
time!</div></font></div>
<div><font size="2" face="Verdana"></font> </div>
<div align="left"><font color="#c0c0c0" size="2" face="Verdana">2013-08-20
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<div><font size="3" face="微软雅黑">谨祝顺祺！</font></div>
<div>WITH BEST WISHES!</div>
<div> </div>
<div>JIA, SUN</div>
<div>TEL: (+86)15077857866</div>
<div>E-MAIL: SUNJIAOUC@SINA.COM</div>
<div>PHYSICAL OCEANOGRAPHY LAB</div>
<div>HOHAI UNIVERSITY</div>
<div>1 XIKANG, GULOU, NANJING, JIANGSU PROVINCE, CHINA,
210098 </div></div></div></div></span></font></div></font>
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