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145
7.14 GRIBOUT — Controlling the Grib Output
Additional parameters for controlling the output:
Name
Type
Definition / Purpose / Comments
ysystem
CHAR
This switch has been eliminated in Version 4.28
File, database or ecfs.
ydbtype
CHAR
This switch has been eliminated in Version 4.28
Type of the database.
yform write
CHAR
Specifies the format of output files
Default
’grb1’
’grb1’ (default) write GRIB1 data with DWD’s GRIB
library.
’api1’ write GRIB 1 data with ECMWF’s grib api.
’api2’ write GRIB 2 data with ECMWF’s grib api.
’ncdf’ write NetCDF data.
nprocess ini
INT
Generating process identification for initial data.
-999999
nprocess bd
INT
Generating process identification for boundary data.
-999999
n num
INT
This switch has been eliminated in Version 4.28
Counter for nests.
nrbit
INT
Number of bits per value for grib packing. Usually, 16 bits
give sufficient accuracy.
16
nunit of time
INT
Indicates the Unit of Time for Grib Code
1
lcheck
LOG
Checking the output data for min/max values.
.TRUE.
lanalysis
LOG
If .TRUE., analysis output files are written when the model
runs in nudging mode.
.FALSE.
lwrite const
LOG
If .TRUE., constant fields are written as grib output at
initial time.
.TRUE.
luvmasspoint
LOG
Enables interpolation of horizontal winds to mass grid
points for output.
.FALSE.
l p filter
LOG
Logical switch, if .TRUE., the fields on pressure levels are
digitaly filtered to remove small-scale noise
.FALSE.
l z filter
LOG
Logical switch, if .TRUE., the fields on height levels are
digitaly filtered to remove small-scale noise.
.FALSE.
itype vertint
INT
To specify the type of the vertical interpolation used to
interpolate values to p- and / or z-level.
1
1: Cubic tension splines (previous method)
2: Linear interpolation (new in Version 4.17)
l fi ps smooth
LOG
This switch has been renamed (see below), because what
really is smoothed here is the mean sea level pressure!
---
l fi pmsl smooth
LOG
Logical switch, if .TRUE., additional smoothing is done for
mean sea-level pressure and geopotential in mountainous
areas.
.FALSE.
l fi filter
LOG
Logical switch to filter the geopotential FI independent of
the settings of l p filter.
.FALSE.
Part VII – User’s Guide 4.28
Section 7: Namelist Input for COSMO-Modell