[Wrf-users] time_step

[Sara Fenech]

Dear all

can someone indicate the exact method of finding the correct time_step if
the output data is required hourly and dx  = 48000 (parent),     9600
(nest) please?

I've set it to 240 however I'm still getting some constant data during the
end of the last month of a 3 month long simulation.

Thanks in advance
Kind Regards
Sara Fenech

Namelist.input

&time_control
run_days                 = 92,
run_hours                = 0,
run_minutes              = 0,
run_seconds              = 0,
start_year               = 2011,     2011,
start_month              = 6,        6,
start_day                = 1,        1,
start_hour               = 0,        0,
start_minute             = 00,       00,
start_second             = 00,       00,
end_year                 = 2011,     2011,
end_month                = 8,        8,
end_day                  = 31,       31,
end_hour                 = 0,        0,
end_minute               = 00,       00,
end_second               = 00,       00,
interval_seconds         = 21600,
input_from_file          = .true.,   .true.,
history_interval         = 60,       60,
frames_per_outfile       = 1000,     1000,
restart                  = .false.,
restart_interval         = 5000,
io_form_history          = 2,
io_form_restart          = 2,
io_form_input            = 2,
io_form_boundary         = 2,
debug_level              = 0,
/

&domains
time_step                = 240,
time_step_fract_num      = 0,
time_step_fract_den      = 1,
max_dom                  = 2,
e_we                     = 100,      381,
e_sn                     = 60,      171,
e_vert                   = 28,       28,
p_top_requested          = 5000,
num_metgrid_levels       = 27,
num_metgrid_soil_levels  = 4,
dx                       = 48000,     9600,
dy                       = 48000,     9600,
grid_id                  = 1,        2,
parent_id                = 1,        1,
i_parent_start           = 1,       16,
j_parent_start           = 1,       18,
parent_grid_ratio        = 1,        5,
parent_time_step_ratio   = 1,        5,
feedback                 = 0,
smooth_option            = 0,
/

&physics
mp_physics               = 3,        3,
ra_lw_physics            = 1,        1,
ra_sw_physics            = 1,        1,
radt                     = 30,       30,
sf_sfclay_physics        = 1,        1,
sf_surface_physics       = 2,        2,
bl_pbl_physics           = 1,        1,
bldt                     = 0,        0,
cu_physics               = 1,        1,
cudt                     = 5,        5,
isfflx                   = 1,
ifsnow                   = 0,
icloud                   = 1,
surface_input_source     = 1,
num_soil_layers          = 4,
sf_urban_physics         = 0,        0,
maxiens                  = 1,
maxens                   = 3,
maxens2                  = 3,
maxens3                  = 16,
ensdim                   = 144,
/

&fdda
/

&dynamics
w_damping                = 0,
diff_opt                 = 1,
km_opt                   = 4,
diff_6th_opt             = 0,        0,
diff_6th_factor          = 0.12,     0.12,
base_temp                = 290.,
damp_opt                 = 0,
zdamp                    = 5000.,    5000.,
dampcoef                 = 0.2,      0.2,
khdif                    = 0,        0,
kvdif                    = 0,        0,
non_hydrostatic          = .true.,   .true.,
moist_adv_opt            = 1,        1,
scalar_adv_opt           = 1,        1,
/

&bdy_control
spec_bdy_width           = 5,
spec_zone                = 1,
relax_zone               = 4,
specified                = .true.,  .false.,
nested                   = .false.,   .true.,
/

&grib2
/

&namelist_quilt
nio_tasks_per_group      = 0,
nio_groups               = 1,
/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/wrf-users/attachments/20140224/572ae4a7/attachment.html