ARPS for AOS C115/C228

On this page is a special version of ARPS version 4.5.2 made specifically for AOS C115/C228.

To use ARPS from the Synoptic Lab Linux machines, copy /home/fovell/arpsC115.tar to your home directory and untar it with tar -xvf arpsC115.tar. This will create a directory called arpsC115 and the executables are in arpsC115/bin.

To build and run ARPS on your own Mac, Windows or Linux computer, download this source code file arps4.5.2.1_C115.tar (16 MB). The g95 compiler suffices; Cygwin is needed for Windows. If you download the source, you can alter the model domain dimensions.

READ THIS FIRST:   How to use ARPS (PDF file)

You may need to edit your GrADS control file to add an "options byteswapped" line. Keep in mind that ARPS GrADS output calls the control file ".gradscntl" and the binary data file ".gad". The casename is set in the ARPS input script file.

Here are some notes on creating Vis5D output with ARPS:   How to use Vis5D (PDF file)

Pre-built ARPS 3D executables for various platforms

[UPDATED 25 May 2007]

ARPS pre-built executables for your own computers
Mac PPCMac IntelWindows
2D   arps2D.macppc     arps2D.macintel     arps2D.exe  
3D   arps.macppc     arps.macintel     arps.exe  

For the Windows version: Also download cygwin1.dll and make sure it resides in the same directory as the arps.exe executable.

For the Mac versions: Rename the executables as "arps". You probably have to issue this command from the Terminal, before it will run: chmod u+x arps. This presumes you have renamed the executable to "arps".

Files for 3D roll test run

arps.input
C1_quarter_circle_RUN06.snd
roll.gs
roll_movie.gs

Files and scripts for various other ARPS simulations

ARPS for 2D multicell storm simulations

If you've downloaded ARPS, all you need do is edit include/dims.inc, changing the dimensions to, say, nx=203, ny=4, nz=45, and execute makearps arps again. If you are using my pre-built binaries, you need to download one of the 2D versions linked above. In either case, here are some files for use with 2D multicell storm simulations.

arps.input.2D   [pre-configured for a 2D storm with ice microphysics]
may22.d5p0.snd   [sounding file from D=5 case of Fovell and Dailey (1995) and Fovell and Tan (1998)]

Some important lines in the arps.input.2D file:

Some GrADS scripts for 2D storm simulations:

2d.gs   [execute in GrADS to set display to 2D x-z mode]
ptprt2D.gs   [color shaded perturbation potential temperature]
w2D.gs & nbsp [color shaded vertical velocity]
cond2D.gs & nbsp [color shaded total condensate for ice simulations]
rgbset.gs & nbsp [color table file, same as from DTDM/DTDM2]
cbarn.gs & nbsp [color bar file, same as from DTDM/DTDM2]

Sample 2D output from a squall line with ice showing perturbation potential temperature, vertical motion, and total condensation with storm-relative horizontal velocity, made using the scripts above

ARPS for 3D supercell storm simulations

These files were used to make the 3D splitting storm simulation illustrated below, derived from the famous Del City storm of Wilhelmson and Klemp (1978). The wind profile has been modified to help keep the storm from propagating out of the domain. This is tantamount to making the domain translate east-northeastward. Thus, the right mover "appears" to move only slowly.

arps.input.delcity   [pre-configured for a 3D storm with no ice microphysics]
may20.snd   [sounding file for Del City case]
w3D.gs   [script used to make vertical velocity plots below]

Sample 3D output from the Del City storm, showing vertical velocity at 5 km level (set lev 5000) for various times. The first time is right after the initial split. Notice the left mover subsequently splits again. What happens if the moisture and the wind profiles are altered?