namelist.input参数详解
时间: 2024-10-18 13:06:24 浏览: 22
`namelist.input`通常是一个在Fortran语言中用于读取文本文件的变量名或数组名。它用于指定从哪个文件读取数据,即输入文件的路径。在`namelist`结构中,`input`是常见的关键字,表示要读取的数据存储在输入文件中。
Namelist是Fortran提供的一种方便处理分块数据的机制,它允许将相关的数据项组织在一起,并通过特定的格式描述文件(`.def`或`.nam`)指定它们的布局。当程序运行时,你可以通过`open`命令打开这个文件,然后用`read`语句配合`namelist`来逐块读取和解析数据。
例如:
```fortran
character(len=80) :: filename ! 文件名
integer :: unit ! 文件单位
! 定义namelist格式
namelist /my_namelist/ var1, var2, var3
! 打开文件
unit = 10
open(unit, file=filename)
! 读取namelist数据
read(unit, nml=my_namelist) % 或者直接 read(unit) if filename in the namelist
close(unit)
```
这里的`filename`就是`namelist.input`,你需要提供具体的文件路径。
相关问题
namelist.input参数说明
在namelist.input中,有几个参数需要说明:
1. out_format:这个参数用于设置输出文件的格式,可以选择"WPS"、"SI"或"MM5"。如果设置为"WPS",ungrib将以WPS中间格式写入数据;如果设置为"SI",ungrib将以grib_prep.exe格式写入输出;如果设置为"MM5",ungrib将以MM5 pregrid程序的格式写入输出。默认值为"WPS"。
2. prefix:这个参数用于设置ungrib创建的中间格式文件的前缀。prefix是一个字符串,指定了中间文件的文件名前缀YYYY-MM-DD_HH中的字符串前缀。前缀可以包含相对或绝对路径信息,如果指定了路径信息,中间文件将写入指定的目录。这个参数可以在多个GRIB数据源上运行ungrib时避免重命名中间文件。默认值为"FILE"。
综上所述,namelist.input中的out_format参数用于设置输出文件的格式,可以选择"WPS"、"SI"或"MM5";prefix参数用于设置ungrib创建的中间格式文件的前缀。
#### 引用[.reference_title]
- *1* *2* *3* [WRF中namelist.wps与namelist.input参数详解](https://blog.csdn.net/qq_40505953/article/details/124768253)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]
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。
阅读全文