wrf模拟分辨率27km和9km区别
时间: 2023-11-18 09:03:37 浏览: 270
WRF模拟分辨率27km和9km的区别主要体现在以下几个方面:
1. 空间分辨率:27km和9km分别表示了WRF模拟中的网格点之间的距离或边长。较高的空间分辨率可以更准确地模拟气象过程的演变,特别是对于那些受地形影响较强的区域,如山脉、海岸线等。因此,9km的空间分辨率相比27km更能够准确地模拟这些区域的气象过程。
2. 计算资源:随着分辨率的增加,WRF模拟需要更多的计算资源,包括计算机的内存和处理器速度。因此,9km分辨率的模拟需要更多的计算资源比27km分辨率的模拟。
3. 模拟时间步长:较高的空间分辨率需要更小的时间步长,以确保模拟结果的准确性。因此,9km分辨率的模拟需要更小的时间步长,使计算时间更长。
总的来说,9km分辨率的WRF模拟可以更准确地模拟气象过程的演变,特别是对于那些受地形影响较强的区域。但是,它需要更多的计算资源和更长的计算时间。27km分辨率的模拟可以更快地得到初步结果,但是它的模拟结果可能不够准确。选择合适的分辨率需要考虑到具体的研究目的和计算资源。
相关问题
全球等经纬度投影,分辨率为0.25度,WRF模拟中namelist.wps和namelist.input配置样例
好的,以下是你需要的样例配置:
namelist.wps:
```
&share
wrf_core = 'ARW',
max_dom = 1,
start_date = '2021-11-01_00:00:00',
end_date = '2021-11-02_00:00:00',
interval_seconds = 21600,
io_form_geogrid = 2,
/
&geogrid
parent_id = 1,
parent_grid_ratio = 1,
i_parent_start = 1,
j_parent_start = 1,
e_we = 144,
e_sn = 91,
geog_data_res = '15m',
dx = 0.25,
dy = 0.25,
map_proj = 'latlong',
ref_lat = 0.0,
ref_lon = 90.0,
truelat1 = 33.0,
truelat2 = 45.0,
stand_lon = 90.0,
geog_data_path = '/path/to/geog_data/',
/
```
namelist.input:
```
&time_control
run_days = 1,
run_hours = 0,
run_minutes = 0,
run_seconds = 0,
start_year = 2021,
start_month = 11,
start_day = 01,
start_hour = 00,
start_minute = 00,
start_second = 00,
end_year = 2021,
end_month = 11,
end_day = 02,
end_hour = 00,
end_minute = 00,
end_second = 00,
interval_seconds = 21600,
input_from_file = .true.,
history_interval = 60,
frames_per_outfile = 1,
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 = 180,
max_dom = 1,
s_we = 1,
e_we = 144,
s_sn = 1,
e_sn = 91,
s_vert = 1,
e_vert = 31,
dx = 0.25,
dy = 0.25,
grid_id = 1,
parent_id = 0,
i_parent_start = 1,
j_parent_start = 1,
parent_grid_ratio = 1,
parent_time_step_ratio = 1,
feedback = 1,
smooth_option = 0,
/
&physics
mp_physics = 8,
ra_lw_physics = 1,
ra_sw_physics = 1,
radt = 30,
sf_sfclay_physics = 5,
sf_surface_physics = 2,
bl_pbl_physics = 1,
bldt = 0,
cu_physics = 1,
cudt = 5,
isfflx = 1,
ifsnow = 1,
icloud = 1,
surface_input_source = 1,
num_soil_layers = 4,
mp_zero_out = 0,
h_mom_adv_order = 5,
v_mom_adv_order = 3,
use_surface = 1,
p_top_requested = 5000,
num_metgrid_levels = 32,
num_metgrid_soil_levels = 4,
dx = 0.25,
dy = 0.25,
/
&fdda
/
&dynamics
w_damping = 0,
diff_opt = 1,
km_opt = 4,
diff_6th_opt = 0,
diff_6th_factor = 0.12,
base_temp = 290.
damp_opt = 0,
zdamp = 5000.,
dampcoef = 0.2,
khdif = 0,
kvdif = 0,
non_hydrostatic = .true.,
moist_adv_opt = 1,
scalar_adv_opt = 1,
/
&bdy_control
spec_bdy_width = 5,
spec_zone = 1,
relax_zone = 4,
specified = .true.,
nested = .false.,
/
&grib2
/
&namelist_quilt
nio_tasks_per_group = 0,
nio_groups = 1,
/
```
注意:以上配置中的dx和dy都为0.25,这是因为你要使用全球等经纬度投影,分辨率为0.25度的数据。如果你使用其他数据,请根据数据分辨率修改dx和dy的值。另外,如果你没有安装过WRF所需的地理数据,你需要根据实际情况修改namelist.wps中的geog_data_path,指向你的地理数据所在的路径。
全球等经纬度投影,分辨率为0.25度,WRF模拟em_real中namelist.input配置样例
下面是一个WRF模拟em_real中namelist.input的样例,其中包含了全球等经纬度投影和0.25度的分辨率配置:
```
&time_control
run_days = 0,
run_hours = 12,
run_minutes = 0,
run_seconds = 0,
start_year = 2021, 2021, 2021,
start_month = 07, 07, 07,
start_day = 13, 14, 15,
start_hour = 12, 12, 12,
start_minute = 00, 00, 00,
start_second = 00, 00, 00,
end_year = 2021, 2021, 2021,
end_month = 07, 07, 07,
end_day = 14, 15, 16,
end_hour = 00, 00, 00,
end_minute = 00, 00, 00,
end_second = 00, 00, 00,
interval_seconds = 21600
input_from_file = .true.,.true.,.true.,
history_interval = 60, 60, 60,
frames_per_outfile = 1, 1, 1,
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 = 300,
time_step_fract_num = 0,
time_step_fract_den = 1,
max_dom = 1,
e_we = 1440,
e_sn = 721,
e_vert = 31,
p_top_requested = 5000,
num_metgrid_levels = 32,
num_metgrid_soil_levels = 4,
dx = 0.25,
dy = 0.25,
grid_id = 1,
parent_id = 0,
i_parent_start = 1,
j_parent_start = 1,
parent_grid_ratio = 1,
parent_time_step_ratio = 1,
feedback = 1,
smooth_option = 0
/
&physics
mp_physics = 3,
ra_lw_physics = 1,
ra_sw_physics = 1,
radt = 30,
sf_sfclay_physics = 1,
sf_surface_physics = 2,
bl_pbl_physics = 1,
bldt = 0,
cu_physics = 1,
cudt = 5,
isfflx = 1,
ifsnow = 0,
icloud = 1,
surface_input_source = 1,
num_soil_layers = 4,
sf_urban_physics = 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,
diff_6th_factor = 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.,
moist_adv_opt = 1,
scalar_adv_opt = 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,
/
```
注意,这只是一个样例,具体配置可能需要根据你的模拟需求进行调整。
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