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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.

GFDL_AM2: GFDL Atmospheric Model with on-line aerosols

General information

Model name and version

short nameGFDL_AM2
full nameGFDL Atmospheric Model with on-line aerosols
revisionkhartoum
date
last change

Responsible for this information

namePaul Ginoux
instituteNOAA GFDL
addressForrestal Campus Route 1, PO BOX 308
zip08542
cityPrinceton
countryUSA
phone011-1-609 987 5071
fax011-1-609 987 5063
e-mailpaul.ginoux(belongs-to)noaa.gov

Additional information on the model

Contact person for model code

same as person above
namePaul Ginoux
instituteNOAA GFDL
divisionsForrestal Campus Route 1, PO BOX 308
street
zip08542
cityPrinceton
countryUSA
phone011-1-609 987 5071
emailpaul.ginoux(belongs-to)noaa.gov
fax011-1-609 987 5063

Model developer and model user

developer and userGFDL-AM2 GCM has been developed by GFDL scientific community. The implementation of on-line aerosols have been realized mainly by Paul Ginoux and Larry Horowitz.

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 detailshttps://fms.gfdl.noaa.gov

Minimum computer resources required

type
time needed for run
storage

Further information

documentation
model references
webpagehttps://fms.gfdl.noaa.gov
additional information

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 radioactivity
2nd radioactivity
3rd radioactivity
remarks

Approximations

Boussinesq
anelastic
hydrostatic
flat earth
remarks

Parametrizations

Chemistry & transport

photolysis rate
dry depositionaerodynamic resistance
wet depositionin and below clouds (large scale and convective)
remarks

Chemical reactions

Gas & wet phase chemistry

chemical transformations calculated
chemical transformations neglected
othersimple SO4 chemistry
gas phase chemistry (give details)simplified SO4 chemistry: constant monthly 3D distribution of O3, HO2, OH, NO3 are prescribed, with prognostics equation for SO2, DMS and H2O2 species.
wet phase chemistry (give details)SO4 production by H2O2 and O3 in aqueous phase
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 detailsSectional approach: dust and sea-salt, 5 bins from 0.1 to 10 um (radius) Modal approach: SO4, OC, BC Hygroscopic growth of SO4, OC phyllic and sea-salt for radiation

Initialization & boundary treatment

Initialization

chemistry & transportTransport: IC from multi-decadal integration Chemistry: 1 year spin-up
meteorology

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

orography
land useGFDL-LM2
obstacles
vegetation
meteorology
concentrations
emissions
remarks

Data assimilation

Chemistry & transport
nudging technique
adjoint model
3D-VAR
4D-VAR
OI
detailsThe horizontal winds (u and v) are nudged with NCEP re-analysis usin a 6-hour relaxation parameter.

Boundary conditions

Chemistry & transport
surfaceTransport: Observed sea-surface temperature Chemistry: aerosol emission
topChemistry: zero flux
lateral inflowNA
lateral outflowNA

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
remarks

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
othersemi-Lagrangian finite volume (SJ Lin, 2004)
chemistry solver

Model resolution

Chemistry & transport

HorizontalVertical
max
min

Domain size

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)