[Wrf-users] WPS time interpolation?

[Eric Altshuler]

Hi Matt, 


There is no need to do this interpolation. You can use the run_days, run_hours, run_minutes and run_seconds variables in namelist.input to control the length of your run, regardless of how long the period covered by your lateral boundary conditions is (of course, the run length specified by the run_* variables cannot be longer than the period covered by the boundary conditions). If you're only running for a few time steps, you should probably set run_seconds to an exact multiple of the time step (in seconds) and the other run_* variables to 0. These run_* namelist settings do not affect WPS or real.exe, only wrf.exe 


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: "Matt Masarik" <mattmasarik at boisestate.edu> 
To: wrf-users at ucar.edu 
Sent: Thursday, February 19, 2015 1:00:44 AM 
Subject: [Wrf-users] WPS time interpolation? 


Hi All, 


I'm new to running WRF and this list. I'm interested in doing some benchmarking 
and believe I only need to do a few ( ~ 10) time steps for this purpose. I am using 
the NARR 3-hourly dataset for lateral boundary conditions. My problem is I can't 
figure out how to do short runs like this (much shorter than 3 hours) with 3-hourly 
forcing data. 


I have tried playing with the time fields in namelist.wps / namelist.input. From these 
experiments I get that 'end_date' must be at least 'interval_seconds' greater 
than 'start_date'. To satisfy that the forcing data would need to be interpolated 
in time to smaller time intervals. Can that be done with WPS? Or, if I'm not going 
in the right direction, is there another way to solve this? 


Thanks for your consideration, 
Matt 














_______________________________________________ 
Wrf-users mailing list 
Wrf-users at ucar.edu 
http://mailman.ucar.edu/mailman/listinfo/wrf-users 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/wrf-users/attachments/20150220/3202cefc/attachment.html