WRF ARW User's Guide - MMM - UCAR

MODEL
If diff_opt=2, km_opt=2 or 3 then
0 = constant fluxes defind by
tke_drag_coefficient,
tke_heat_flux;
1 = use model computed u*, and heat and
moisture fluxes;
2 = use model computed u*, and specified
heat flux by tke_heat_flux
ifsnow 0 snow-cover effects (only works for
sf_surface_physics = 1)
1 = with snow-cover effect
0 = without snow-cover effect
icloud 1 cloud effect to the optical depth in
radiation (only works for ra_sw_physics =
1 and ra_lw_physics = 1)
1 = with cloud effect
0 = without cloud effect
swrad_scat 1. Scattering tuning parameter (default 1 is
1.e-5 m 2 /kg)
surface_input_source 1,2 where landuse and soil category data come
from:
1 = WPS/geogrid;
2 = GRIB data from another model (only
if arrays VEGCAT/SOILCAT exist)
num_soil_layers number of soil layers in land surface
model (set in real)
5 thermal diffusion scheme for temp only
4 Noah land-surface model
6 RUC land-surface model
pxlsm_smois_init
(max_dom)
2 Pleim-Xu land-surface model
1 PX LSM soil moisture initialization option
0: from analysis
1: from LANDUSE.TBL (SLMO)
num_land_cat 24 number of landuse categories in input data
num_soil_cat 16 number of soil categories in input data
usemonalb .false. whether to use monthly albedo map
instead of table values. Recommended for
sst_update = 1
rdmaxalb .true. use snow albedo from geogrid; false
means use snow albedo from table
rdlai2d .false. use LAI from input data; false means
using values from table
seaice_threshold 271. tsk < seaice_threshold, if water point and
WRF-ARW V3: User’s Guide 5-42