Pre-Compiled RIP Code

The RIP code has already been compiled and is available on your instance in: /home/ec2-user/graphics/RIP_47

Environment variables

In order to run RIP, it is necessary to set a couple of environment variables. You must specify where your RIP_ROOT directory is. This is the directory where you will be running the RIP code, and you must also specify where the NCAR Graphics Library is located. For these machines, it is located as is listed below.

Go into your RIP_47/ directory

setenv  RIP_ROOT  path_to_your-RIP-directory/RIP_47
setenv  NCARG_ROOT /home/ec2-user/graphics/NCL

 

Run ripdp

Create a directory to which you will save the post-processed data:
        mkdir RIPDP

Now run ripdp to post-process the data. We want all the data - so no need to use the ripdp namelist.

    ./ripdp_wrfarw  RIPDP/myCase  all  path_to_your_wrfout_files/wrfout_d01_*
 

Notes:

• Use ripdp_wrfarw since we are using the WRF-ARW core.


• The use of the ripdp namelist (ripdp_wrfarw_sample.in) is optional for WRF-ARW.        


• As when running some of the other processes, when you run this, you will also see a message at the end that says "Note: The following floating-point exceptions are signalling: IIEE_UNDERFLOW_FLAG IEEE_DENORMAL". There is no need to be concerned about this message. This was put in for testing purposes and should not cause any problems.

Run rip

Copy a namelist to your working directory:
   cp sample_infiles/rip_sample.in .

There are a number of sample files available for real and idealized cases:

Real Cases	Idealized Cases
rip_sample.in	bwave.in grav2d_x.in hill2d.in qss.in sqx.in sqy.in

 

Edit the rip_sample.in file. Pay attention to the following:

• ptimes
  Make sure these correspond to the available times in your wrfout file
  e.g., 0,-12,3  means hours 0 to 12 every 3 hours. This can also be specified as 0,3,6,9,12
   
• ncarg_type
  Use this to control the output type. Available options are 'cgm', 'x11', 'pdf', but for use with the AWS instance, please keep this set to 'x11'.
   
• Look for the line: feld=tic; ptyp=sb; sloc=KORD; hodo; sndg
  The function of this line is to generate a skewT plot at location KORD (which is the Chicago-O'Hare International Airport).
  For our case study domain, this will be outside the domain. Using this will create the following error message
       The sounding requested at the following
       location is outside the cross-point domain:
       x,y=     ,     lat,lon= 41.98, -87.90 stn=KORD,72530
       Please correct input file and re-execute RIP
  
  To solve this problem, change the station location to a location inside your domain. Example, sloc=KBOU, is a station in Boulder, Colorado.
  A full list of station names are available in the stationlist file located in the RIP directory.
  

Run rip
   ./rip  -f  RIPDP/myCase  rip_sample.in

The output will be displayed on your screen ('x11').