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README_test_cases
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WRFV3 (Weather Research and Forecast) model.
Contents:
A) Directions for running a test case.
B) List of available test cases
---------------------------------------
(A) Directions for running a test case
A suite of tests for the WRF model ARW (Advanced Research WRF) core
can be found in the directory "test". Each subdirectory in /test
contains the necessary data (except for the real data case) and
input files to run the test specific to that directory.
To run specific test, builld the WRF model
and the necessary initialization routine by typing
-> compile "test_name"
in the top directory (the directory containing this README file).
For example, to build the executables for the 2D (x,z) squall line
example for Eulerian mass coordinate model, you would type the command
"compile em_squall2d_x".
after a successful build, go the the specific test directory:
-> cd test/"test_name"
run the initialization code
-> ideal.exe
and then run the simulation
-> wrf.exe
---------------------------------------
(B) Available Test Cases
The available test cases are
1) squall2d_x (test/em_squall2d_x)
2D squall line (x,z) using Kessler microphysics
and a fixed 300 m^2/s viscosity. periodicity
condition used in y so that 3D model produces
2D simulation. v velocity should be zero and there
should be no variation in y in the results.
2) squall2d_y (test/em_squall2d_y)
Same as squall2d_x, except with (x) rotated to (y).
u velocity should be zero and there
should be no variation in x in the results.
3) 3D quarter-circle shear supercell simulation
(test/em_quarter_ss).
Left and right moving supercells are produced.
See the README.quarter_ss file in the test directory
for more information.
4) 2D flow over a bell-shaped hill (x,z) (test/em_hill2d_x)
10 km half-width, 2 km grid-length, 100 m high hill,
10 m/s flow, N=0.01/s, 30 km high domain, 80 levels,
open radiative boundaries, absorbing upper boundary.
Case is in linear hydrostatic regime, so vertical tilted
waves with ~6km vertical wavelength.
5) 3D baroclinic waves (test/em_b_wave)
Baroclinically unstable jet u(y,z) on an
f-plane. Symmetric north and south, periodic east and west
boundaries. 100 km grid size 16 km top with 4 km damping layer.
41x81 points in (x,y), 64 layers.
6) 2D gravity current (test/em_grav2d_x)
Test case is described in Straka et al,
INT J NUMER METH FL 17 (1): 1-22 JUL 15 1993.
See the README.grav2d_x file in the test directory.
7) 3D large-eddy simulation (test/em_les)
A large-eddy simulation (LES) of a free convective boundary
layer (CBL) with 0 environmental wind at the initial time, and
the turbulence of the free CBL driven/maintained by the
specified surface heat flux.
8) 2D full physics seabreeze (test/em_seabreeze2d_x)
The case is more set up now to demonstrate how to set all land
variables so that full physics options may be used. Tuning is
needed to produce real sea-breeze simulation at this point.
9) 3D global case (test/em_heldsuarez)
A coarse-resolution global forecast case that is described in
"A proposal for the intercomparison of the dynamical cores of
atmospheric general circulation models" by Held and Suarez
(Bulletin of the American Meteorological Society; 1994, Vol
75, 1825-1830). This test of the global solver is dry, and
produces midlatitude jets, breaking midlatitude baroclinic
waves, etc.
10) Single column model (test/em_scm_xy)
11) 3D tropical cyclone (test/em_tropical_cyclone)
Idealized tropical cyclone on an f-plane with constant SST in a
specified environment. Uses capped Newtonian relaxation to mimic
longwave radiation. The default setup uses the Jordan (1958) mean
hurricane sounding with 28 C SST and no background winds. The
analytic initial vortex is from Rotunno and Emanuel (1987). This
case is useful for testing the effects of new model code (e.g.,
new physics options) on tropical cyclones in an idealized framework.