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More information on some input arrays can be found when moving the cursor above the corresponding field in the questionnaire. Those fields are also explained in the glossary.

COSMO-7: Consortium for Small Scale Modelling, Swiss 7 km mesh configuration

General information

Model name and version

short nameCOSMO-7
full nameConsortium for Small Scale Modelling, Swiss 7 km mesh configuration
revisionCOSMO 3.20.4
dateJune 2007
last change

Responsible for this information

namePirmin Kaufmann
instituteMeteoSwiss
addressKrähbühlstr. 58
zip8044
cityZürich
countrySwitzerland
phone+41 44 256 95 46
fax+41 44 256 92 78
e-mailpirmin.kaufmann(belongs-to)meteoswiss.ch

Additional information on the model

Contact person for model code

same as person above
namePhilippe Steiner
instituteMeteoSwiss
divisions
streetKrähbühlstr. 58
zip8044
cityZürich
countrySwitzerland
phone+41 44 256 96 44
emailphilippe.steiner@meteoswiss.ch
fax+41 44 256 92 78

Model developer and model user

developer and userConsortium for Small Scale Modelling (COSMO) Weather services of Germany, Greece, Italy, Poland, Romania, Switzerland

Level of Knowledge needed to operate model

basic
intermediate
advanced
remarks

Model use at your institution

operational
for research
other use

Model code available?

is available?yes
more detailsOnly for research

Minimum computer resources required

typelarge supercomputer
time needed for runca. 30min for 24h forecast
storageca 10 GB / run

Further information

documentationAvailable on web page
model referencesSteppeler, J., Doms, G., Schättler, U., Bitzer, H.W., Gassmann, A., Damrath, U., Gregoric, G.: Meso-gamma scale forecasts using the nonhydrostatic model LM. Meteorology and Atmospheric Physics, 82 (1 - 4), 75 - 96, 2003.
webpagehttp://www.cosmo-model.org, mirror: http://cosmo-model.cscs.ch
additional information

Model properties

Model type

2D
3D
meteorology
chemistry & transport

Model scale

microscale
mesoscale
macroscale
short term
long term

Meteorological variables

PrognosticDiagnostic
u
v
w
ζ
pv
T
θ
θl
p
Gph
ρ
qv
qt
qlc
qf
qsc
qlr
qsh
qsg
qss
N
E
ε
K
zi
other variables i
other variables ii
other variables iii

Approximations

Boussinesq
anelastic
hydrostatic
flat earth
remarksnon-hydrostatic, compressible

Parametrizations

Meteorology

turbulence schemeprognostic level 2.5 after Mellor and Yamada (1974)
deep convectionmass flux scheme based on Tiedtke (1989)
surface exchangerefined surface layer scheme incl. laminar BL (roughness layer) based on TKE equation
surface temperaturefrom 7-layer prognostic soil model, heat conduction equation (Schrodin and Heise, 2001, in COSMO Tech. Rep. 2)
surface humidityfrom 6-layer prognostic soil model, incl. freeze and thaw of soil moisture.
radiationdelta-two-stream method after Ritter and Geleyn (1992)
unresolved orographic dragorographic drag considered in TKE scheme
radiation in vegetation
radiation between obstacles
treatment of obstacles
clouds / rainelaborate Kessler-type scheme incl. cloud water and ice, rain water and snow.
remarks

Initialization & boundary treatment

Initialization

chemistry & transport
meteorologyModel analysis, if unavailable: interpolated IFS analysis with digital filter after Lynch (1997)

Input data (name sources for data, e.g. website)

orographyGLOBE data set of NOAA/NGDC (1km)
land useCORINE data set (1km) , EOS-sat. system (NASA, 250m)
obstacles
vegetation
meteorologyWMO operational European land (Synop,climat..), ship, airplane and satellite measurements, radiosoundings etc., via global telekommunication network (GTS)
concentrations
emissions
remarks

Data assimilation

Meteorology
nudging technique
adjoint model
3D-VAR
4D-VAR
OI
detailsContinuous 4D nudging assim. after Schraff (1996), for horizontal wind, Tpot, rel. hum. on all model levels and surface pressure. External snow height analysis.

Boundary conditions

Meteorology
surfaceFriction boundary conditions boundary conditions for horiz. vel., temp. and water substances, non-penetrative for grid-scale mass fluxes, free slip for u and v, extrapolated boundary cond. for pressure disturbance.
topRayleigh damping layer,non-penetrative boundary conditions = rigid lid with free-slip condition for horiz. vel., temp. and water substances.
lateral inflowInterpolation from ECMWF global model IFS, with relaxation boundary condition after Davies(1976) for all prognostic variables except vert. velocity.
lateral outflow

Nesting

Meteorology
one way
two way
other
variables nested
nesting online
nesting offline
data exchange by array
data exchange by file
time step for data exchange3 hours
explain methodInterpolation
variables nested
other

Solution technique

Coordinate system and projection

Horizontal

cartesian
Lambert conformal
latitude / longitude
rotated lat. / long.

Vertical

z coordinate
surface fitted grid
pressurecoordinate
sigma coordinate
remarks

Numeric

Meteorology

Grid

Arakawa A
Arakawa B
Arakawa C
Arakawa D
Arakawa E
uniform grid
nonuniform grid
Euler

Time integration

explicit
split-explicit
semi-implicit
othersplit-explicit for 2 and 3 time levels

Spatial discretisation

momentum equationsgrid point method with finite difference approximation
scalar quantitiesgrid point method with finite difference approximation
additional information
other

Model resolution

Meteorology

HorizontalVertical
max72500 (top)
min710 (lowest layer)

Domain size

Meteorology

HorizontalVertical
max270023000
min100023000

Model Validation and Application

Validation & evaluation

Used validation & evaluation methods

analytic solutions
evaluated reference dataset
model intercomparison
additional validation & evaluation efforts
remarks

Application examples

application examplesTwice daily operational mesoscale weather forecasts

Participation in specific model evaluation exercises

AQMEII
List experiments (AQMEII)
Cost728
List experiments (COST728)
HTAP
List experiments (HTAP)
MEGAPOLI
List experiments (MEGAPOLI)