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Detailed Namelist Options
This page gives detailed descriptions on all possible namelist options for the WRFDA system.
Common runtime namelist options
| Name |
Type |
Size |
Default |
Detailed description |
| &wrfvar1 |
| var4d |
logical |
1 |
.false. |
Switch for 4DVAR assimilation. ".true." turns on 4DVAR. |
| var4d_bin |
integer |
1 |
3600 |
For 4DVAR, sets the observation sub-window bin length in seconds. |
var4d_bin_rain |
integer |
1 |
3600 |
For Precipitation 4DVAR, sets the observation sub-window bin length in seconds. |
var4d_lbc |
logical |
1 |
.true. |
Switch for lateral boundary control in 4DVAR. See "update_bc" section for more details. |
| &wrfvar2 |
| &wrfvar3 |
fg_format |
integer |
1 |
1 |
Indicates the format the first guess (background) file.
1 = WRF-ARW (by far the most likely option)
2 = WRF-NMM
3 = WRF-GLOBAL
4 = Korean Meteorological Association (KMA) Global Model |
ob_format |
integer |
1 |
2 |
Indicates the format the files containing conventional observations to be assimilated.
1 = BUFR (WMO binary format) WRFDA must be compiled with BUFR libraries to use this option.
2 = ASCII (WRFDA format, output from OBSPROC)
3 = MADIS (NOT SUPPORTED) |
| &wrfvar4 |
use_synopobs |
logical |
1 |
.true. |
Switch for |
use_shipsobs |
logical |
1 |
.true. |
Switch for |
use_metarobs |
logical |
1 |
.true. |
Switch for |
use_soundobs |
logical |
1 |
.true. |
Switch for |
use_mtgirsobs |
logical |
1 |
.true. |
Switch for |
use_tamdarobs |
logical |
1 |
.true. |
Switch for |
use_pilotobs |
logical |
1 |
.true. |
Switch for |
use_airepobs |
logical |
1 |
.true. |
Switch for |
use_geoamvobs |
logical |
1 |
.true. |
Switch for |
use_polaramvobs |
logical |
1 |
.true. |
Switch for |
use_bogusobs |
logical |
1 |
.true. |
Switch for |
use_buoyobs |
logical |
1 |
.true. |
Switch for |
use_profilerobs |
logical |
1 |
.true. |
Switch for |
use_satemobs |
logical |
1 |
.true. |
Switch for |
use_gpsztdobs |
logical |
1 |
.false. |
Switch for |
use_gpspwobs |
logical |
1 |
.true. |
Switch for |
use_gpsrefobs |
logical |
1 |
.true. |
Switch for |
| top_km_gpsro |
real |
1 |
30.0 |
|
| bot_km_gpsro |
real |
1 |
0.0 |
|
use_ssmiretrievalobs |
logical |
1 |
.false. |
Switch for |
use_ssmitbobs |
logical |
1 |
.false. |
Switch for |
use_ssmt1obs |
logical |
1 |
.false. |
Switch for |
use_ssmt2obs |
logical |
1 |
.false. |
Switch for |
use_qscatobs |
logical |
1 |
.true. |
Switch for |
use_radarobs |
logical |
1 |
.false. |
Switch for |
use_radar_rv |
logical |
1 |
.false. |
Switch for |
use_radar_rf |
logical |
1 |
.false. |
Switch for |
use_radar_rle |
logical |
1 |
.false. |
Switch for |
use_radar_rr |
logical |
1 |
.false. |
Switch for |
use_rainobs |
logical |
1 |
.false. |
Switch for |
use_hirs2obs |
logical |
1 |
.false. |
Switch for |
use_hirs3obs |
logical |
1 |
.false. |
Switch for |
use_hirs4obs |
logical |
1 |
.false. |
Switch for |
use_mhsobs |
logical |
1 |
.false. |
Switch for |
use_msuobs |
logical |
1 |
.false. |
Switch for |
use_amsuaobs |
logical |
1 |
.false. |
Switch for |
use_amsubobs |
logical |
1 |
.false. |
Switch for |
use_airsobs |
logical |
1 |
.false. |
Switch for |
use_airsretobs |
logical |
1 |
.false. |
Switch for |
use_eos_amsuaobs |
logical |
1 |
.false. |
Switch for |
use_hsbobs |
logical |
1 |
.false. |
Switch for |
use_ssmisobs |
logical |
1 |
.false. |
Switch for |
use_iasiobs |
logical |
1 |
.false. |
Switch for |
use_kma1dvar |
logical |
1 |
.false. |
Switch for |
use_filtered_rad |
logical |
1 |
.false. |
Switch for |
use_obs_errfac |
logical |
1 |
.false. |
Switch for |
use_atmsobs |
logical |
1 |
.false. |
Switch for |
use_mwtsobs |
logical |
1 |
.false. |
Switch for |
use_mwhsobs |
logical |
1 |
.false. |
Switch for |
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Advanced options
| Name |
Type |
Size |
Default |
Detailed description |
| &wrfvar1 |
| write_increments |
logical |
1 |
.false. |
".true." directs WRFDA to write out an "analysis_increment" file in native WRF format. This is a binary format, and will be unreadable for most users. |
| multi_inc |
integer |
1 |
0 |
Flag for multi-incremental 4DVAR.
0 = Normal 4DVAR
1 = Multi-incremental 4DVAR
2 = ??? |
| print_detail_radar |
logical |
1 |
.false. |
Extra output for radar |
The "print_detail" options print additional diagnostic output to the rsl.out.* files. These options can make the rsl.out.* files extremely large, and drown out the important output messages. For this reason, these options should be used sparingly. |
| print_detail_rain |
logical |
1 |
.false. |
Extra output for rainfall assimilation |
| print_detail_rad |
logical |
1 |
.false. |
Extra output for radiance assimilation |
| print_detail_xa |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_xb |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_obs |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_f_obs |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_map |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_grad |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_regression |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_spectral |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_testing |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_parallel |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_be |
logical |
1 |
.false. |
Extra output for ???? |
| print_detail_outerloop |
logical |
1 |
.false. |
Extra output for ???? |
| check_max_iv_print |
logical |
1 |
.true. |
Used only in radar assimilation. |
| &wrfvar2 |
| analysis_accu |
integer |
1 |
900 |
If the difference between the "analysis_date" set in the namelist and the date read from the first guess file are larger than this value in seconds, WRFDA will issue a warning message: "=======> Wrong xb time found???" |
| calc_w_increment |
logical |
1 |
.false. |
If set to .false., the increment of the vertical velocity w will be zero unless information on the vertical velocity is directly assimilated (for example, from radar radial velocity observations).
If set to .true., the increment of the vertical velocity w will be diagnosed based on the increments of other fields. |
| dt_cloud_model |
logical |
1 |
.false. |
?????????? |
| var_wind |
logical |
1 |
.false. |
Switch for wind speed/direction assimilation.
".true." enables direct assimilation of wind speed/direction observations
".false." WRFDA will convert speed/direction observations to u- and v-components prior to assimilation. |
| qc_rej_both |
logical |
1 |
.false. |
".true.": If quality control rejects one component of the wind speed (u, v, speed, or direction) for an observation, both components will be discarded.
".false.": Quality control for each component of a wind observation will be handled separately. |
| &wrfvar3 |
| num_fgat_time |
integer |
1 |
1 |
Number of time slots for FGAT assimilation. Only works with ob_format=2. |
| &wrfvar4 |
| thin_conv |
logical |
1 |
.true. |
Switch for thinning conventional observations (radiance observations are automatically thinned). Only works with NCEP PREPBUFR obs(ob_format=1). Thinning mesh for each observation type is determined by thin_mesh_conv. |
| thin_mesh_conv |
real |
max_
instruments |
20.0 |
Sets the thinning mesh scale for each individual observation, in kilometers. The observation numbers are defined as follows:
- SOUND: Sounding
- SYNOP: Non-metar synoptic observation
- PILOT: Pilot balloon
- SATEM: Satellite temperature retrieval
- GEOAMV: Atmospheric Motion Vector from Geostationary Satellite
- POLARAMV: Atmospheric Motion Vector from Polar-orbiting Satellite
- AIREP: Aircraft report
- GPSPW: Precipitable Water derived from Global Positioning System (GPS)
- GPSRF: GPS Refractivity
- METAR: METAR synoptic observation
- SHIPS: Ship observation
- SSMI_RV: Retrieved precipitable water or sea-surface wind observation from the Special Sensor Microwave/Imager (SSMI)
- SSMI_TB: SSMI Brightness Temperature
- SSMT1: SSMT/1 Water Vapor Profiler
- SSMT2: SSMT/2 Water Vapor Profiler
- QSCAT: QuikSCAT wind
- PROFILER: Wind profiler
- BUOY: Buoy observation
- BOGUS: Bogus observation, typically for tropical cyclone initialization
- PSEUDO: Pseudo-observations; user-specified artificial observations
- RADAR: Doppler radar
- RADIANCE: Satellite radiance
- AIRS RETRIEVAL: Atmospheric InfraRed Sounder retrieval
- SONDE_SFC: Surface observation taken in conjunction with radiosonde launch
- MTGIRS: Meteostat Third Generation InfraRed Sounding
- TAMDAR: Tropospheric Airborne Meteorological DAta Reporting
- TAMDAR_SFC: TAMDAR observation for plane on ground
- RAIN: Rainfall observation; works only with 4DVAR. As opposed to all other observations in this list, rainfall observation thinning is controlled by thin_rainobs. See User's Guide for more details.
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| thin_rainobs |
logical |
1 |
.true. |
Switch for thinning rainfall observations. |
Non-recommended or obsolete options
| Name |
Type |
Size |
Default |
Detailed description |
| &wrfvar1 |
| use_background_errors |
logical |
1 |
.true. |
Setting this value to ".false." disables the reading of background error, and no assimilation is performed. For debugging purposes only. |
| check_buddy_print |
logical |
1 |
.false. |
"buddy_check" is depreciated, and will likely be removed in a future version. |
| &wrfvar2 |
| write_mod_filtered_obs |
logical |
1 |
.false. |
Enables additional output to "filtered_obs*" files when "analysis_type" = "QC-OBS" |
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| &wrfvar3 |
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