7. Model input parameter values¶
Simulation datasets were produced using the following parameters for the WRF model:
PARAMETER |
VALUE |
DESCRIPTION |
|---|---|---|
SIMULATION START DATE |
2018-07-01_00:00:00 |
The date and time when the simulation commenced. |
WEST-EAST_GRID_DIMENSION |
52 |
Dimension of the grid in the West-East direction. |
SOUTH-NORTH_GRID_DIMENSION |
52 |
Dimension of the grid in the South-North direction. |
BOTTOM-TOP_GRID_DIMENSION |
51 |
Dimension of the grid in the vertical direction. |
DX |
9000.f |
Grid resolution in the X direction (m). |
DY |
9000.f |
Grid resolution in the Y direction (m). |
SKEBS_ON |
0 |
Stochastic kinetic energy backskatter scheme. |
SPEC_BDY_FINAL_MU |
1 |
Whether to call spec_bdy_final for mu. |
USE_Q_DIABATIC |
0 |
Whether to include QV and QC tendencies in advection (i.e. to consider moisture tendency from microphysics in small steps). |
GRIDTYPE |
C |
Type of grid used by the model. |
DIFF_OPT |
1 |
Turbulence and mixing option. |
KM_OPT |
4 |
Eddy coefficient option. |
DAMP_OPT |
0 |
Upper-level damping flag (0 = no damping). |
DAMP_COEFF |
0.2f |
Damping coefficient. |
KHDIF |
0.f |
Horizontal diffusion constant (m2/s). |
KVDIF |
0.f |
Vertical diffusion constant (m2/s). |
MP_PHYSICS |
10 |
Microphysics scheme. |
RA_LW_PHYSICS |
4 |
Longwave radiation scheme. |
RA_SW_PHYSICS |
4 |
Shortwave radiation scheme. |
SF_SFCLAY_PHYSICS |
2 |
Surface layer scheme. |
SF_SURFACE_PHYSICS |
2 |
Land surface scheme. |
BL_PBL_PHYSICS |
2 |
Planetary boundary for layer scheme. |
CU_PHYSICS |
3 |
Cumulus parameterization scheme. |
SF_LAKE_PHYSICS |
0 |
Lake physics scheme. |
SURFACE_INPUT_SOURCE |
3 |
Landuse and soil category. |
SST_UPDATE |
1 |
Option to use time-varying SST, seaice, vegetation fraction, and albedo during a model simulation. |
GRID_FDDA |
0 |
Grid nudging option (0 = none). |
GFDDA_INTERVAL_M |
0 |
Time interval (minutes) vetween analyses for the grid nudging. |
GFDDA_END_H |
0 |
Time (hours) to stop nudging after the start of the forecast. |
GRID_SFDDA |
0 |
Surface FDDA switch (0 = off). |
SGFDDA_INTERVAL_M |
0 |
Time interval (minutes) between surface analysis times. |
SGFDDA_END_H |
0 |
Time (hours) to stop surface nudging after the start of the forecast. |
HYPSOMETRIC_OPT |
2 |
Hypsometric option. |
USE_THETA_M |
0 |
Whether to use theta (1+1.61QV). |
GWD_OPT |
0 |
Gravity wave drag option (0 = off). |
SF_URBAN_PHYSICS |
1 |
Urban surface model option. |
SF_OCEAN_PHYSICS |
0 |
Ocean model option. |
SHCU_PHYSICS |
0 |
Shallow convection option. |
MFSHCONV |
0 |
Turns on day-time EDMF for QNSE (0 = off). |
FEEDBACK |
0 |
For nested domain: 0 = one-way nesting, 1 = two-way nesting. |
SMOOTH_OPTION |
2 |
Smoothing option for the parent domain in the area of the nest if feedback is on. |
SWRAD_SCAT |
1.f |
Scattering turning parameter for ra_sw_physics = 1. |
W_DAMPING |
1 |
Vertical velocity damping flag. |
DT |
36.f |
Time step (seconds). |
RADT |
1.f |
Minutes between radiation physics calls. |
BLDT |
0.f |
Minutes between boundary-layer physics calls (0 = call every time step). |
CUDT |
0.f |
Minutes between cumulus physics calls. |
AER_OPT |
0 |
Aerosol input option (RRTMG only). |
SWINT_OPT |
0 |
Interpolation of shortwave radiation based on the updated solar zenith angle between radiation calls (0 = no interpolation, 1 = use interpolation) |
AER_TYPE |
1 |
Aerosol type to be used |
AER_A0D550_OPT |
1 |
|
AER_ANGEXP_OPT |
1 |
|
AER_SSA_OPT |
1 |
|
AER_ASY_OPT |
1 |
|
AER_AOD550_VAL |
0.12f |
|
AER_ANGEXP_VAL |
1.3f |
|
AER_SSA_VAL |
0.85f |
|
AER_ASY_VAL |
0.9f |
|
MOIST_ADV_OPT |
1 |
Advection options for moisture. |
SCALAR_ADV_OPT |
1 |
Advection options for scalars. |
TKE_ADV_OPT |
1 |
Advection options for TKE. |
DIFF_6TH_OPT |
0 |
6th-order numerical diffusion (0 = none). |
DIFF_6TH_FACTOR |
0.12f |
6th-order numerical diffusion non-dimensional rate. |
OBS_NUDGE_OPT |
0 |
obs-nudging fdda (0 = off). |
BUCKET_MM |
-1.f |
Bucket reset values for water accumulation (-1 = inactive). |
BUCKET_J |
-1.f |
Bucket reset value for energy accumulations (-1 = inactive). |
PREC_ACC_DT |
0.f |
Bucket reset time interval between outputs for cumulus or grid-scale precipitation (in minutes). |
ISFTCFLX |
0 |
Alternative Ck (exchange coefficient for temp and moisture), Cd (drag coefficient for momentum) formulation for tropical storm application. |
ISHALLOW |
0 |
Turns on shallow convection (default is 0 = off). |
ISFFLX |
1 |
Heat and moisture fluxes from the surface for real-data cases and when a PBL is used. |
ICLOUD |
1 |
Cloud effect to the optical depth in radiation. |
ICLOUD_CU |
0 |
|
TRACER_PBLMIX |
1 |
Mix tracer fields consistent with PBL option. |
SCALAR_PBLMIX |
0 |
Mix scalar fields consistent with PBL option. |
YSU_TOPDOWN_PBLMIX |
0 |
Turns on top-down radiation-driven mixing (default is 0 = no). |
GRAV_SETTLING |
0 |
Gravitational settling of fog/cloud droplets (default 0 = no settling). |
DFI_OPT |
0 |
Digital filter initialization (default 0 = none). |
SIMULATION_INITIALIZATION_TYPE |
REAL DATA CASE |
|
WEST-EAST_PATCH_START_UNSTAG |
1 |
|
WEST-EAST_PATCH_END_UNSTAG |
51 |
|
WEST-EAST_PATCH_START_STAG |
1 |
|
WEST-EAST_PATCH_END_STAG |
52 |
|
SOUTH-NORTH_PATCH_START_UNSTAG |
1 |
|
SOUTH-NORTH_PATCH_END_UNSTAG |
51 |
|
SOUTH-NORTH_PATCH_START_STAG |
1 |
|
SOUTH-NORTH_PATCH_END_STAG |
52 |
|
BOTTOM-TOP_PATCH_START_UNSTAG |
1 |
|
BOTTOM-TOP_PATCH_END_UNSTAG |
50 |
|
BOTTOM-TOP_PATCH_START_STAG |
1 |
|
BOTTOM-TOP_PATCH_END_STAG |
51 |
|
GRID_ID |
1 |
Domain identifier (can be 1, 2 or 3). |
PARENT_ID |
0 |
ID of the parent domain. |
I_PARENT_START |
1 |
The starting lower-left corner i-indice from the parent domain. |
J_PARENT_START |
1 |
The starting lower-left corner j_indice from the parent domain. |
PARENT_GRID_RATIO |
1 |
Parent-to-nest domain grid size ratio. |
CEN_LAT |
12.99997f |
Latitude of the domain’s center. |
CEN_LON |
-4.950012f |
Longitude of the domain’s center. |
TRUELAT1 |
20.f |
Projection parameter - true latitude 1. |
TRUELAT2 |
0.f |
Projection parameter - true latitude 2. |
MOAD_CEN_LAT |
12.99997f |
Mother of all domains center latitude. |
STAND_LON |
5.f |
Projection parameter - standard longitude. |
POLE_LAT |
90.f |
The pole latitude. |
POLE_LON |
0.f |
The pole longitude. |
GMT |
0.f |
|
JULYR |
2018 |
|
JULDAY |
182 |
|
MAP_PROJ |
1 |
Map projection. |
MAP_PROJ_CHAR |
Lambert Conformal |
Map projection. |
MMINLU |
MODIFIED_IGBP_MODIS_NOAH |
Related to land use category. |
NUM_LAND_CAT |
21 |
Number of land categories in input data. |
ISWATER |
17 |
Related to land use category. |
ISLAKE |
21 |
Related to land use category. |
ISICE |
15 |
Related to land use category. |
ISURBAN |
13 |
Related to land use category. |
ISOILWATER |
14 |
Related to land use category. |
HYBRID_OPT |
-1 |
Option related to the hybrid vertical coordinates. |
ETAC |
0.f |
Option related to the hybrid vertical coordinates. |