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FLEXPART/A: FLEXPART Particle Dispersion Model

General information

Model name and version

short nameFLEXPART/A
full nameFLEXPART Particle Dispersion Model
revision
date14-11-2005
last change

Responsible for this information

nameMatthias Langer
instituteCentral Institute for Meteorology and Geodynamics
addressHohe Warte 38
zipA-1191
cityVienna
countryAustria
phone+43-1-36026-2416
fax+43-1-36026-74
e-mailmatthias.langer(belongs-to)zamg.ac.at

Additional information on the model

Contact person for model code

same as person above
nameMatthias Langer
instituteCentral Institute for Meteorology and Geodynamics
divisionsHohe Warte 38
street
zipA-1191
cityVienna
countryAustria
phone+43-1-36026-2416
emailmatthias.langer(belongs-to)zamg.ac.at
fax+43-1-36026-74

Model developer and model user

developer and userFLEXPART model developer: Andreas Stohl Modification for ALADIN input: Marcus Hirtl; Matthias Langer

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?no
more details

Minimum computer resources required

typeSPARC Workstation/Blade1000-Blade2000
time needed for run48h simulation: ~8 min for ECMWF input / ~20 min for ALADIN input
storage48h simulation: ~2 MegaByte per nuclide

Further information

documentation
model referencesStohl, A., Hittenberger, M., Wotawa, G., 1998: Validation of the Lagrangian particle dispersion model FLEXPART against large scale tracer experiment data. Atmos.Env., 24, 4245-4264. Pechinger U., M.Langer, K.Baumann and E.Petz, 2001: The Austrian Emergency Response Modelling System TAMOS. Phys.Chem.Earth, 26,2,99-103. Galmarini S.,...,Pechinger,U., Polreich,E., et al, 2004: ENSEMBLE dispersion forecastiung, part II: Application and Evaluation. Atmos.Env.,38,4619-4632.
webpagehttp://ensemble.jrc.it
additional informationThe emergency response model TAMOS uses the FLEXPART particle diffusion model Version 5.0 of A.Stohl and P.Seibert (http://zardoz.nilu.no/~andreas/flextra+flexpart.html)

Model properties

Model type

2D
3D
meteorology
chemistry & transport

Model scale

microscale
mesoscale
macroscale
short term
long term

Meteorological variables

Input data
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

Chemical substances

PrognosticDiagnosticDry depositionWet depositionInput data
SO2
NO
NO2
NOX
NH3
HNO3
O3
CH4
DMS
H2O2
VOC
C6H6
HCHO
CO
CO2
POP
PM 10
PM 2.5
PPM10
PM 0.1
PM 1
NH4
SO4
dust
sea salt
BC
POM
SOA
NO3
Other gases
1st radioactivity
2nd radioactivity
3rd radioactivity
Cd
Pb
other heavymetals
pesticides
1st radioactivityCs-137, I-131, up to 28 nuclides
2nd radioactivity
3rd radioactivity
remarkstracers, chemically inert, radioactive decay

Approximations

Boussinesq
anelastic
hydrostatic
flat earth
remarkshybrid coordinates

Parametrizations

Chemistry & transport

photolysis rate
dry depositiongases: resistance method (Wesely and Hicks, 1977, J.Air Poll.Contr.Assoc.,27,1110-1116.) particulate matter: resistance method + impaction term (Slinn, 1982, Atmos.Environ.,16,1785-1794.)
wet depositionscavenging as function of precipitation rate (McMahon and Denison, 1979, Atmos.Environ.,13,571-585.)
remarks

Chemical reactions

Gas & wet phase chemistry

chemical transformations calculated
chemical transformations neglected
other
gas phase chemistry (give details)
wet phase chemistry (give details)
more information

Aerosol chemistry

passive aerosol
dry aerosol
wet aerosol
sectional approach
modal approach
other
nucleation
coagulation
condensation
aerosol mixing
aerosol ageing
primary aerosol formation
aerosol-gas phase interactions
optical properties
give details

Initialization & boundary treatment

Initialization

chemistry & transportsource term
meteorologyas in ECMWF and ALADIN

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

orographyas in ALADIN/A or ECMWF
land useas in ALADIN/A or ECMWF
obstacles
vegetation
meteorologyoutput fields from the operational NWP model ALADIN/A or ECMWF
concentrationsnone
emissionssource term
remarks

Data assimilation

Chemistry & transport
nudging technique
adjoint model
3D-VAR
4D-VAR
OI
details

Boundary conditions

Chemistry & transport
surfacereflection at surface and top of the PBL
topabsorption
lateral inflownone
lateral outflowabsorption

Nesting

Chemistry & transport
one way
two way
other
variables nested
nesting online
nesting offline
data exchange by array
data exchange by file
time step for data exchange
explain method
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
remarkshybrid eta coordinates

Numeric

Chemistry & transport

Grid

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

Time integration

explicit
split-explicit
semi-implicit
time step same as meteorology
other

Spatial discretisation

scalar quantities
additional information
other
chemistry solver

Model resolution

Chemistry & transport

HorizontalVertical
max1 degree (ECMWF)
min0.2 degree (ALADIN)

Domain size

Chemistry & transport

HorizontalVertical
max
minEuropetroposphere

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 examplesStohl, A., Hittenberger, M., Wotawa, G., 1998: Atmos.Env., 24, 4245-4264. Galmarini et al, 2004: Atmos.Env.,38,4607-4617. Galmarini et al, 2004: Atmos.Env.,38,4619-4632. Galmarini et al, 2004: Rad.Protection Dosimetry, 109, 1-2, 19-24. Pechinger, U., Langer, M., Baumann, K., Petz, E., 2001: Phys.Chem.Earth (B), 26,2, 99-103.

Participation in specific model evaluation exercises

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