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EMAC: ECHAM5/MESSy Atmospheric Chemistry Model

General information

Model name and version

short nameEMAC
full nameECHAM5/MESSy Atmospheric Chemistry Model
revision1.9
date02.06.2010
last change

Responsible for this information

namePatrick Jöckel
instituteDeutsches Zentrum für Luft- und Raumfahrt (DLR)
addressMünchner Str. 20, Oberpfaffenhofen
zip82234
cityWessling
countryGermany
phone++49-8153-282565
fax++49-8153-281841
e-mailpatrick.joeckel(belongs-to)dlr.de

Additional information on the model

Contact person for model code

same as person above
namePatrick Jöckel
instituteDeutsches Zentrum für Luft- und Raumfahrt (DLR)
divisionsMünchner Str. 20, Oberpfaffenhofen
street
zip82234
cityWessling
countryGermany
phone++49-8153-282565
emailpatrick.joeckel(belongs-to)dlr.de
fax++49-8153-281841

Model developer and model user

developer and usersee http://www.messy-interface.org (People)

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 detailshttp://www.messy-interface.org (MESSy License)

Minimum computer resources required

type
time needed for run
storage

Further information

documentation
model referencesP. Jöckel, H. Tost, A. Pozzer, C. Brühl, J. Buchholz, L. Ganzeveld, P. Hoor, A. Kerkweg, M. G. Lawrence, R. Sander, B. Steil, G. Stiller, M. Tanarhte, D. Taraborrelli, J. van Aardenne, J. Lelieveld, The atmospheric chemistry general circulation model ECHAM5/MESSy1: consistent simulation of ozone from the surface to the mesosphere, Atmos. Chem. Phys., 6, 5067-5104, 2006. http://www.atmos-chem-phys.net/6/5067
webpagehttp://www.messy-interface.org/
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 idivergence
other variables iiln(surface pressure)
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 radioactivity
2nd radioactivity
3rd radioactivity
remarks

Approximations

Boussinesq
anelastic
hydrostatic
flat earth
remarks

Parametrizations

Meteorology

turbulence scheme
deep convectionsubmodel CONVECT; H. Tost, P. Jöckel, J. Lelieveld, Influence of different convection parameterisations in a GCM, Atmos. Chem. Phys., 6, 5475-5493, 2006. http://www.atmos-chem-phys.net/6/5475
surface exchangeof constituents: submodels ONLEM, OFFLEM, TNUDGE; A. Kerkweg, R. Sander, H. Tost, P. Jöckel, Technical note: Implementation of prescribed (OFFLEM), calculated (ONLEM), and pseudo-emissions (TNUDGE) of chemical species in the Modular Earth Submodel System (MESSy), Atmos. Chem. Phys., 6, 3603-3609, 2006. http://www.atmos-chem-phys.net/6/3603
surface temperature
surface humidity
radiation
unresolved orographic drag
radiation in vegetation
radiation between obstacles
treatment of obstacles
clouds / rain
remarks

Chemistry & transport

photolysis ratesubmodel JVAL; Landgraf, J., and P. J. Crutzen, An efficient method for online calculations of photolysis and heating rates, J. Atmos. Sci., 55, 863-878, 1998.
dry depositionsubmodel DRYDEP; A. Kerkweg, J. Buchholz, L. Ganzeveld, A. Pozzer, H. Tost, P. Jöckel Technical Note: An implementation of the dry removal processes DRY DEPosition and SEDImentation in the Modular Earth Submodel System (MESSy) Atmos. Chem. Phys., 6, 4617-4632, 2006. http://www.atmos-chem-phys.net/6/4617
wet depositionsubmodel SCAV; H. Tost, P. Jöckel, A. Kerkweg, R. Sander, J. Lelieveld, Technical note: A new comprehensive SCAVenging submodel for global atmospheric chemistry modelling, Atmos. Chem. Phys., 6, 565-574, 2006. http://www.atmos-chem-phys.net/6/565
remarks

Chemical reactions

Gas & wet phase chemistry

chemical transformations calculated
chemical transformations neglected
other
gas phase chemistry (give details)submodel MECCA; R. Sander, A. Kerkweg, P. Jöckel. and J. Lelieveld, Technical Note: The new comprehensive atmospheric chemistry module MECCA, Atmos. Chem. Phys., 5, 445-450, 2005. http://www.atmos-chem-phys.net/5/445
wet phase chemistry (give details)submodel SCAV; H. Tost, P. Jöckel, A. Kerkweg, R. Sander, J. Lelieveld, Technical note: A new comprehensive SCAVenging submodel for global atmospheric chemistry modelling, Atmos. Chem. Phys., 6, 565-574, 2006. http://www.atmos-chem-phys.net/6/565
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 detailssubmodel MECCA-AERO; A. Kerkweg, R. Sander, H. Tost, P. Jöckel, and J. Lelieveld, Technical Note: Simulation of detailed aerosol chemistry on the global scale using MECCA-AERO, Atmos. Chem. Phys., 7, 2973-2985, 2007. http://www.atmos-chem-phys.net/7/2973

Initialization & boundary treatment

Initialization

chemistry & transport
meteorology

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

orography
land use
obstacles
vegetation
meteorology
concentrations
emissions
remarks

Data assimilation

MeteorologyChemistry & transport
nudging technique
adjoint model
3D-VAR
4D-VAR
OI
detailsThe nudging scheme of ECHAM5 is applied to relax the model meteorology towards ECMWF (re-)analysis data. But it can also be applied without nudging.

Boundary conditions

MeteorologyChemistry & transport
surface
top
lateral inflow
lateral outflow

Nesting

MeteorologyChemistry & 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
remarksvertical: hybrid pressure grid horizontal: quadratic Gaussian grid corresponding to triangular spectral truncation

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
otherleap-frog with filter

Spatial discretisation

momentum equationsspectral
scalar quantities
additional informationphysics and chemistry in quadratic Gaussian grid corresponding to the spectral triangular truncation
other

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 solverkinetic pre-processor (kpp); A. Sandu and R. Sander. ``Technical Note: Simulating chemical systems in Fortran90 and Matlab with the kinetic preprocessor KPP-2.1'', Atmospheric Chemistry and Physics, Vol. 6, p. 187-195, (2006). V. Damian, A. Sandu, M. Damian, F. Potra, and G.R. Carmichael: ``The Kinetic PreProcessor KPP -- A Software Environment for Solving Chemical Kinetics'', Computers and Chemical Engineering, Vol. 26, No. 11, p. 1567-1579, 2002.

Model resolution

Meteorology

HorizontalVertical
maxT255L90MA
minT10L19

Chemistry & transport

HorizontalVertical
max
min

Domain size

Meteorology

HorizontalVertical
maxglobaltroposphere, stratosphere, middle atmosphere (lower mesosphere)
minglobaltroposphere

Chemistry & transport

HorizontalVertical
maxglobaltroposphere, stratosphere, middle atmosphere (lower mesosphere)
minglobaltroposphere

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 examplessee http://www.messy-interface.org (MESSy Publications)

Participation in specific model evaluation exercises

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