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Note:
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.

STOC_HadAM3: STOCHEM (HadAM3)

General information

Model name and version

short nameSTOC_HadAM3
full nameSTOCHEM (HadAM3)
revision
dateFebruary 1, 2007
last change

Responsible for this information

nameIan MacKenzie
instituteUniversity of Edinburgh
addressInstitute of Atmospheric and Environmental Science, Crew Building, King's Buildings
zipEH9 3JN
cityEdinburgh
countryUK
phone
fax
e-mailiamack(belongs-to)staffmail.ed.ac.uk

Additional information on the model

Contact person for model code

same as person above
nameIan MacKenzie
instituteUniversity of Edinburgh
divisionsInstitute of Atmospheric and Environmental Science, Crew Building, King's Buildings
street
zipEH9 3JN
cityEdinburgh
countryUK
phone
emailiamack(belongs-to)staffmail.ed.ac.uk
fax

Model developer and model user

developer and userOriginally developed at the Met Office (UK). This version maintained and run at the University of Edinburgh, UK.

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?
more detailsContact to discuss.

Minimum computer resources required

typesupercomputer
time needed for run
storage

Further information

documentation
model referencesStevenson et al, 2004, Radiative forcing from aircraft NOx emissions: mechanisms and seasonal dependence, J. geophys Res., 109, doi:10.1029/2004JD004759 Pope et al, (2000), The impact of new physical parametrizations in the Hadley Centre Climate model: HadAM3.
webpage
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

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 schemeSmith (1990), Q J R Meteorol Soc, 116: 435-460.
deep convectionGregory and Rowntree (1990), Mon Weather Rev, 118: 1483-1506. Gregory and Allen (1991), Am Meteorol Soc, 122-123.
surface exchange
surface temperature
surface humidity
radiationEdwards and Slingo (1996), Q J R Meteorol Soc, 122: 689-719. Cusack et al. (1999), J Geophys Res, 104: 2051-2057.
unresolved orographic dragPalmer et al. (1986), Q J R Meteorol Soc, 112: 1001-1039. Milton and Wilson (1996) Mon Weather Rev 124: 2023-2045.
radiation in vegetation
radiation between obstacles
treatment of obstacles
clouds / rainCloud: Smith (1990), Q J R Meteorol Soc, 116: 435-460. Precipitation: Senior and Mitchell (1993), J Clim, 6: 393-418.
remarks

Chemistry & transport

photolysis rateOne dimensional, two stream model (Hough 1988)
dry depositionVelocities calculated by resistance approach
wet depositionScavenging coefficients for convective and large-scale precipitation
remarks

Chemical reactions

Gas & wet phase chemistry

chemical transformations calculated
chemical transformations neglected
other
gas phase chemistry (give details)70 chemical species, 174 chemical reactions (thermal plus photolytic)
wet phase chemistry (give details)Aqueous phase chemistry of several species including SO2, NH3, HNO3, H2O2, and O3.
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 & transportChemical species initialised with climatological values.
meteorologyInitial conditions taken from output of a long steady-state run of same climate model.

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

orography
land use
obstacles
vegetation
meteorologyFrom coupled general circulation model (HadAM3)
concentrations
emissionsEDGAR 3.2 dataset
remarks

Data assimilation

MeteorologyChemistry & transport
nudging technique
adjoint model
3D-VAR
4D-VAR
OI
detailsNo assimilation. Free-running GCM.No assimilation, meterological variables taken from free-running GCM.

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
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
other

Spatial discretisation

momentum equations
scalar quantities
additional information
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 solverBackwards Euler

Model resolution

Meteorology

HorizontalVertical
max4204500
min50

Chemistry & transport

HorizontalVertical
max5504600
min360

Domain size

Meteorology

HorizontalVertical
max
min

Chemistry & transport

HorizontalVertical
max
min

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 examples

Participation in specific model evaluation exercises

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