1 WRFV3 (Weather Research and Forecast) model.
5 A) Directions for running a test case.
6 B) List of available test cases
8 ---------------------------------------
10 (A) Directions for running a test case
12 A suite of tests for the WRF model ARW (Advanced Research WRF) core
13 can be found in the directory "test". Each subdirectory in /test
14 contains the necessary data (except for the real data case) and
15 input files to run the test specific to that directory.
16 To run specific test, builld the WRF model
17 and the necessary initialization routine by typing
19 -> compile "test_name"
21 in the top directory (the directory containing this README file).
22 For example, to build the executables for the 2D (x,z) squall line
23 example for Eulerian mass coordinate model, you would type the command
24 "compile em_squall2d_x".
26 after a successful build, go the the specific test directory:
28 -> cd test/"test_name"
30 run the initialization code
34 and then run the simulation
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40 (B) Available Test Cases
42 The available test cases are
44 1) squall2d_x (test/em_squall2d_x)
46 2D squall line (x,z) using Kessler microphysics
47 and a fixed 300 m^2/s viscosity. periodicity
48 condition used in y so that 3D model produces
49 2D simulation. v velocity should be zero and there
50 should be no variation in y in the results.
52 2) squall2d_y (test/em_squall2d_y)
54 Same as squall2d_x, except with (x) rotated to (y).
55 u velocity should be zero and there
56 should be no variation in x in the results.
58 3) 3D quarter-circle shear supercell simulation
61 Left and right moving supercells are produced.
62 See the README.quarter_ss file in the test directory
65 4) 2D flow over a bell-shaped hill (x,z) (test/em_hill2d_x)
67 10 km half-width, 2 km grid-length, 100 m high hill,
68 10 m/s flow, N=0.01/s, 30 km high domain, 80 levels,
69 open radiative boundaries, absorbing upper boundary.
70 Case is in linear hydrostatic regime, so vertical tilted
71 waves with ~6km vertical wavelength.
73 5) 3D baroclinic waves (test/em_b_wave)
75 Baroclinically unstable jet u(y,z) on an
76 f-plane. Symmetric north and south, periodic east and west
77 boundaries. 100 km grid size 16 km top with 4 km damping layer.
78 41x81 points in (x,y), 64 layers.
80 6) 2D gravity current (test/em_grav2d_x)
82 Test case is described in Straka et al,
83 INT J NUMER METH FL 17 (1): 1-22 JUL 15 1993.
84 See the README.grav2d_x file in the test directory.
86 7) 3D large-eddy simulation (test/em_les)
88 A large-eddy simulation (LES) of a free convective boundary
89 layer (CBL) with 0 environmental wind at the initial time, and
90 the turbulence of the free CBL driven/maintained by the
91 specified surface heat flux.
93 8) 2D full physics seabreeze (test/em_seabreeze2d_x)
95 The case is more set up now to demonstrate how to set all land
96 variables so that full physics options may be used. Tuning is
97 needed to produce real sea-breeze simulation at this point.
99 9) 3D global case (test/em_heldsuarez)
101 A coarse-resolution global forecast case that is described in
102 "A proposal for the intercomparison of the dynamical cores of
103 atmospheric general circulation models" by Held and Suarez
104 (Bulletin of the American Meteorological Society; 1994, Vol
105 75, 1825-1830). This test of the global solver is dry, and
106 produces midlatitude jets, breaking midlatitude baroclinic
109 10) Single column model (test/em_scm_xy)
111 11) 3D tropical cyclone (test/em_tropical_cyclone)
113 Idealized tropical cyclone on an f-plane with constant SST in a
114 specified environment. Uses capped Newtonian relaxation to mimic
115 longwave radiation. The default setup uses the Jordan (1958) mean
116 hurricane sounding with 28 C SST and no background winds. The
117 analytic initial vortex is from Rotunno and Emanuel (1987). This
118 case is useful for testing the effects of new model code (e.g.,
119 new physics options) on tropical cyclones in an idealized framework.
121 12) Convective-radiative equilibrium test (test/em_convrad)
123 Idealized 3d convective-radiative equilibrium test with constant SST
124 and full physics at cloud-resolving 1 km grid size. Periodic b.c.s.
125 Tropical conditions, small f and weak wind.