WRF ARW User's Guide - MMM - UCAR

'v' = Y-direction component of wind,
't' = Temperature,
'p' = Prerssure,
'q' = Specific humidity
"pw": total precipitable water
"ref": refractivity
"ztd": zenith total delay
&wrfvar20
documentation_url “http://www.m
mm.ucar.edu/p
eople/wrfhelp/wrf
var/code/trunk”
&wrfvar21
time_window_min "2002-08-
02_21:00:00.00
00"
WRF-VAR
start time of assimilation time window used for
ob_format=1 and radiances to select observations
inside the defined time_window. Note: new in
V3.1, this variable is also used for ob_format=2 to
double-check if the obs are within the specified
time window.
&wrfvar22
time_window_max "2002-08- end time of assimilation time window used for
03_03:00:00.00ob_format=1
and radiances to select observations
00" inside the defined time_window. Note: new in
V3.1, this variable is also used for ob_format=2 to
double-check if the obs are within the specified
time window.
&wrfvar23 (settings related to the 4D-Var penalty term option, which controls the highfrequency
gravity waves using a digital filter)
jcdfi_use false .true.: Include JcDF term in cost function.
.False.: Ignore JcDF term in cost function.
jcdfi_io false .true.: Read JcDF output from WRF+. Even
jcdfi_use= false. Used for diagnosis.
.False.: Ignore the JcDF output from WRF+
jcdfi_tauc 10800 seconds, filter time window second.
jcdfi_gama 1.0 Scaling number used to tune the weight of JcDF
term
jcdfi_error_wind 3.0 m/s, wind error used in JcDF
jcdfi_error_t 1.0 K, temperature error used in JcDF
jcdfi_error_q 0.001 kg/kg, specific humidity error used in JcDF
jcdfi_error_mu 1000. Pa, perturbation pressure (mu) error used in JcDF
WRF-ARW V3: User’s Guide 6-49