[Wrf-users] plot surface pressure in WRF

[Alex Fierro]

Tabish:

On the staggered C-grid (assuming you are using ARW), P and PB are on the
scalar points (n+1/2, see URL below). Thus, if you really wish to have P at
the surface you will have to interpolate P+PB down to the surface. An easy
way to obtain pressure at the surface is to extract the 'PSFC' 2-D array
from the wrf.out file using ARWpost or using your own post processing
program (the latter being preferred).

http://marine.rutgers.edu/po/documentation/docs.php?doc=romsman&page=technique&a=vertical_grid

Cheers and hope this helps,
-- 
-------------------------------------------------------------
Alexandre Fierro, PhD
Research Scientist-
National Severe Storms Laboratory (NSSL/NOAA)
*The Cooperative Institute for Mesoscale Meteorological Studies* (OU/NOAA)
Los Alamos National Laboratory, Los Alamos, NM (LANL)

"Yesterday is History, Tomorrow is a Mystery and Today is a Gift; That is
why it is called the Present"

"There are only 10 types of people in the world:
Those who understand binary, and those who don't"

"My opinions are my own and not representative of OU, NSSL,
AOML, HRD, LANL or any affiliates."
         ^.^
       (o  o)
     /(   V   )\
   ---m---m----

On 17 February 2015 at 22:00, Eric Altshuler <ela at cola.iges.org> wrote:

> Hi Tabish,
>
> Yes, you are correct. Total pressure = P + PB.
>
> Best regards,
>
> Eric L. Altshuler
> Research Scientist
> Center for Ocean-Land-Atmosphere Studies
> 253 Research Hall, Mail Stop 6C5
> George Mason University
> 4400 University Drive
> Fairfax, VA 22030 USA
>
> E-mail: ela at cola.iges.org
> Phone: (703) 993-5725
> Fax: (703) 993-5770
>
>
> ------------------------------
> *From: *"Tabish Ansari" <tabishumaransari at gmail.com>
> *To: *wrf-users at ucar.edu
> *Sent: *Monday, February 16, 2015 9:04:26 AM
> *Subject: *[Wrf-users] plot surface pressure in WRF
>
> Hi
>
> I want to plot pressure at various model levels (50 in my case). I notice
> that there are 2 variables related to pressure in WRF: P (perturbation
> pressure) and PB (base state pressure).
>
> Do I need to add both the variables to obtain the total pressure at a
> given vertical level?
>
> Thanks in advance
>
> Tabish U Ansari
> MS Research Scholar
> Environmental & Water Resources Engineering Division
> Department of Civil Engineering
> IIT Madras
>
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