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我做了三重嵌套,结果出来副高特别强,观测资料19日h时,副高588线已经退到日本地区,但是wrf模拟出来副高588线在华北地区。我将模拟开始时间分别提前6h,12h,18h,24h结果都是一样,副高仍然在华北地区。随后,又改变了微物理方案和积云参数化方案,结果仍然没有改善。我用ARWpost将模拟的met_em_d01转化出来查看了我需要的19日20h的588线,发现此时的588线和实况比较接近。最后,我又将19日20h设为启动时间,但是wrf模拟出来结果还是和以前一样,588线居然还在华北地区。
求助各位,我的模拟结果到底出了什么问题?为什么起始时刻,物理方案都对强悍的副高一点都不起作用?而且初始场也没有问题啊,met的19日20h的588很正常啊,为什么模拟结果如此奇怪?即使将19日20h设为启动时间,但是wrf模拟出来结果还是和以前一样,588线居然还在华北地区。
求各位高手指点下,非常感激!!
以下是namelist.input的一部分:
interval_seconds = 21600
input_from_file = .true.,.false,.false.,
history_interval = 60, 60, 60,
frames_per_outfile = 1000, 1000, 1000,
restart = .false.,
restart_interval = 5000,
io_form_history = 2
&domains
time_step = 90,
time_step_fract_num = 0,
time_step_fract_den = 1,
max_dom = 3,
parent_grid_ratio = 1, 3, 3,
parent_time_step_ratio = 1, 3, 3,
feedback = 1,
smooth_option = 0
/
&physics
mp_physics = 0, 4, 4,
ra_lw_physics = 1, 1, 1,
ra_sw_physics = 1, 1, 1,
radt = 30, 30, 30,
sf_sfclay_physics = 1, 1, 1,
sf_surface_physics = 1, 1, 1,
bl_pbl_physics = 1, 1, 1,
bldt = 0, 0, 0,
cu_physics = 1, 1, 0,
cudt = 5, 5, 5,
isfflx = 1,
ifsnow = 1,
icloud = 1,
surface_input_source = 1,
num_soil_layers = 4,
sf_urban_physics = 0, 0, 0,
/
&fdda
/
&dynamics
w_damping = 0,
diff_opt = 1,
km_opt = 4,
diff_6th_opt = 0, 0, 0,
diff_6th_factor = 0.12, 0.12, 0.12,
base_temp = 290.
damp_opt = 0,
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,
/
&bdy_control
spec_bdy_width = 5,
spec_zone = 1,
relax_zone = 4,
specified = .true., .false.,.false.,
nested = .false., .true., .true.,
/
&grib2
/
&namelist_quilt
nio_tasks_per_group = 0,
nio_groups = 1,
/
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