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本人之前做的是热带气旋的传统的分析。目前新接触WRF。对模式的了解不够,在强度模拟上出现问题。
以WRF-ARW online tutorial的Matthew台风为例,设置了两层嵌套,dx/dy=18000/6000,发现路径模拟尚可,但强度明显偏低。
求助各位前辈高人,是否再加一层更精密的嵌套能解决问题?还是我在设置上出了什么问题?不胜感激。
namelist及附图如下:
&time_control
run_days = 0,
run_hours = 48,
run_minutes = 0,
run_seconds = 0,
start_year = 2016, 2016, 2016,
start_month = 10, 10, 10,
start_day = 06,06, 06,
start_hour = 00, 00, 00,
end_year = 2016, 2016, 2016,
end_month = 10, 10, 10,
end_day = 08, 08, 08,
end_hour = 00, 00, 00,
interval_seconds = 21600
input_from_file = .true., .false., .false.,
history_interval = 180, 60, 60,
frames_per_outfile = 1000, 1000, 1000,
restart = .false.,
restart_interval = 1440,
io_form_history = 2
io_form_restart = 2
io_form_input = 2
io_form_boundary = 2
/
&domains
time_step = 100,
time_step_fract_num = 0,
time_step_fract_den = 1,
max_dom = 2,
e_we = 185, 268, 604,
e_sn = 154, 316, 667,
s_vert = 1, 1, 1,
e_vert = 40, 40, 40,
p_top_requested = 5000,
num_metgrid_levels = 32,
num_metgrid_soil_levels = 4,
dx = 18000, 6000, 3000,
dy = 18000, 6000, 3000,
grid_id = 1, 2, 3,
parent_id = 0, 1, 2,
i_parent_start = 1, 32,36
j_parent_start = 1, 21,57
parent_grid_ratio = 1, 3, 3,
parent_time_step_ratio = 1, 3, 2,
feedback = 1,
smooth_option = 0
sfcp_to_sfcp = .true.
/
&physics
sst_update = 0,
physics_suite = 'CONUS'
mp_physics = 8, 8,
cu_physics = 0, 0,
ra_lw_physics = 4, 4,
ra_sw_physics = 4, 4,
bl_pbl_physics = 2, 2,
sf_sfclay_physics = 2, 2,
sf_surface_physics = 2, 2,
radt = 10, 10,
bldt = 0, 0,
cudt = 0, 0,
icloud = 1,
num_land_cat = 21,
sf_urban_physics = 0, 0,
surface_input_source = 1
/
&fdda
!grid_fdda = 1,
!gfdda_inname = "wrffdda_d<domain>",
!gfdda_interval_m = 360,
!gfdda_end_h = 24,
!io_form_gfdda = 2,
/
&dynamics
hybrid_opt = 2,
w_damping = 0,
diff_opt = 1, 1, 1,
km_opt = 4, 4, 4,
diff_6th_opt = 0, 0, 0,
diff_6th_factor = 0.12, 0.12, 0.12,
base_temp = 290.
damp_opt = 3,
zdamp = 5000., 5000., 5000.,
dampcoef = 0.2, 0.2, 0.2
khdif = 0, 0, 0,
kvdif = 0, 0, 0,
non_hydrostatic = .true., .true., .true.,
moist_adv_opt = 1, 1, 1,
scalar_adv_opt = 1, 1, 1,
gwd_opt = 1,
/
&bdy_control
spec_bdy_width = 5,
specified = .true.
/
&grib2
/
&namelist_quilt
nio_tasks_per_group = 0,
nio_groups = 1,
/
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