WRF ARW User's Guide - MMM - UCAR

MODEL
eta_levels: model eta levels from 1 to 0, if you choose to do so. If not, real will
compute a nice set of eta levels. The computed eta levels have 7 half levels in the lowest
1 km or so, and stretches to constant δz.
Other options for use to assist vertical interpolation are:
use_surface: whether to use surface input data
extrap_type: vertical extrapolation of non-temperature fields
t_extrap_type: vertical extrapolation for potential temperature
use_levels_below_ground: use levels below input surface level
force_sfc_in_vinterp: force vertical interpolation to use surface data
lowest_lev_from_sfc: place surface data in the lowest model level
p_top_requested: pressure top used in the model, default is 5000 Pa
interp_type: vertical interpolation method: linear in p(default) or log(p)
lagrange_order: vertical interpolation order, linear (default) or quadratic
zap_close_levels: allow surface data to be used if it is close to a constant pressure
level.
Other minimum set of namelist variables to edit are:
start_*, end_*: start and end times for data processing and model integration
interval_seconds: input data interval for boundary conditions
time_step: model time step, and can be set as large as 6*DX (in km)
e_ws, e_sn, e_vert: domain dimensions in west-east, south-north and vertical
dx, dy: model grid distance in meters
To run real-data initialization program compiled using serial or OpenMP (smpar) options,
type
./real.exe >& real.out
Successful completion of the job should have ‘real_em: SUCCESS EM_REAL INIT’
printed at the end of real.out file. It should also produce wrfinput_d01 and wrfbdy_d01
files. In real data case, both files are required.
Run WRF model by typing
./wrf.exe
A successful run should produce one or several output files with names like
wrfout_d_ (where represents domain ID, and
represents a date string with the format yyyy-mm-dd_hh:mm:ss. For
example, if you start the model at 1200 UTC, January 24 2000, then your first output file
should have the name:
WRF-ARW V3: User’s Guide 5-9