[Wrf-users] Transforming eta levels to p levels

[Eric Altshuler]

The best way to do vertical interpolation of WRF output is to use one of the postprocessing tools. These include ARWpost (for WRF-ARW only), UPP (ARW and NMM), NCL and RIP. If you're running WRF-ARW, then ARWpost is probably the easiest to use, although the others can calculate many more diagnostic fields. 


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 

----- Original Message -----
From: "孙佳" <sunjiaouc at sina.com> 
To: "wrf-users" <wrf-users at ucar.edu> 
Sent: Wednesday, May 21, 2014 9:21:28 PM 
Subject: [Wrf-users] Transforming eta levels to p levels 


Dear all, 

I was doing the wrfout data analysis in MATLAB. Data in "wrfout_*" files are constructed in eta levels, and this is not convinient for atmosphere analysis. 

with the following formula, I get eta values but different from those in namelist files. 
eta = (P0-P_TOP)/(PSFC-P_TOP) where P0=P+PB, and P PB PSFC P_TOP are all variables in wrfout_d* files 

So, I am not sure that it is right if I use P0 = P+PB to do the p_level interpretion. 

Can you give me some advise? I will be very appreciate about it! 

Thank you all! 


2014-05-22 





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