I use wrf-nmm v4.3 for the nwp model. When I put parameter
euler_adv = .true.,
in &dynamics stanza of the namelist.input file, it causes the appearance of strange grids on the surface temperature distribution, while in the case of
euler_adv = .false.,
they disappear.
Can anyone help me to solve the problem!
---------------------------------my namelist.input file--------------------------------------------------------------------------------------
&domains
time_step = 20,
time_step_fract_num = 0,
time_step_fract_den = 10,
max_dom = 2,
e_we = 226, 178,
e_sn = 286, 204,
e_vert = 60, 60,
dx = 0.06119, 0.02040,
dy = 0.06049, 0.02016,
i_parent_start = 1, 92,
j_parent_start = 1, 105,
grid_id = 1, 2,
parent_id = 0, 1,
parent_grid_ratio = 1, 3,
parent_time_step_ratio = 1, 3,
num_metgrid_levels = 34,
p_top_requested = 5000.,
ptsgm = 42000.,
num_moves = 0
feedback = 0
smooth_option = 0
numtiles = 1
nproc_x = -1
nproc_y = -1
/
&physics
mp_physics = 5, 5,
ra_lw_physics = 99, 99,
ra_sw_physics = 99, 99,
nrads = 60, 180,
nradl = 60, 180,
co2tf = 1
sf_sfclay_physics = 2, 2,
sf_surface_physics = 2, 2,
bl_pbl_physics = 2, 2,
nphs = 6, 18,
cu_physics = 2, 2,
ncnvc = 6, 18,
tprec = 3, 3,
theat = 6, 6,
tclod = 6, 6,
trdsw = 6, 6,
trdlw = 6, 6,
tsrfc = 6, 6,
pcpflg = .false., .false.,
num_soil_layers = 4,
rdlai2d = .true.,
usemonalb = .true.,
mp_zero_out = 0
! gwd_opt = 0
/
&dynamics
coac = 1.6,
codamp = 6.4,
slophc = 0.006364,
euler_adv = .false., //or .true.,
idtadt = 1,
idtadc = 1,
/
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