Species in GEOS-Chem

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On this page, we provide a list of species included in GEOS-Chem v11-01 and later versions.

Full-chemistry

The following table lists the species in the full-chemistry simulations.

Species Formula Full name Molec wt
(g/mol)
Chem Advect Drydep Wetdep Photol Mechanisms
A3O2 CH3CH2CH2OO Primary RO2 from C3H8 X Standard, Trop, SOA, UCX
ACET CH3C(O)CH3 Acetone 12, 3C X X X X Standard, Trop, SOA, UCX
ACTA CH3C(O)OH Acetic acid X Standard, Trop, SOA, UCX
ALD2 CH3CHO Acetaldehyde 12, 2C X X X X Standard, Trop, SOA, UCX
ALK4 ≥C4 alkanes 12, 4C X X Standard, Trop, SOA, UCX
ATO2 CH3C(O)CH2O2 RO2 from acetone X Standard, Trop, SOA, UCX
ATOOH CH3C(O)CH2OOH ATO2 peroxide X X Standard, Trop, SOA, UCX
B3O2 CH3CH(OO)CH3 Secondary RO2 from C3H8 X Standard, Trop, SOA, UCX
BENZ C6H6 Benzene 12, 6C X X Standard, SOA
C2H6 C2H6 Ethane 12, 2C X X Standard, Trop, SOA, UCX
C3H8 C3H8 Propane 12, 3C X Standard, Trop, SOA, UCX
CH2O CH2O Formaldehyde 30 X Standard, Trop, SOA, UCX
CH4 CH4 Methane 16 X X Standard, UCX
CO CO Carbon monoxide 28 X X Standard, Trop, SOA, UCX
CO2 CO2 Carbon dioxide 44 X X Standard, Trop, SOA, UCX
DHMOB HOCH2C(CH3)(OH)C(=O)CHO See Paulot et al., ACP (2009) X Standard, Trop, SOA, UCX
DIBOO Dibble peroxy radical X Standard, Trop, SOA, UCX
DMS (CH3)2S Dimethylsulfide 62 X X Standard, Trop, SOA, UCX
EOH C2H5OH Ethanol X
(fixed)
Standard, Trop, SOA, UCX
ETHLN CHOCH2ONO2 Ethanal nitrate X Standard, Trop, SOA, UCX
ETO2 CH3CH2OO Ethylperoxy radical X Standard, Trop, SOA, UCX
ETP CH3CH2OOH Ethylhydroperoxide X X Standard, Trop, SOA, UCX
GLYC HOCH2CHO Glycoaldehyde (hydroxyacetaldehyde) 60 X X X X X Standard, Trop, SOA, UCX
GLYX CHOCHO Glyoxal X X Standard, Trop, SOA, UCX
H H Hydrogen atom X Standard, UCX
H2 H2 Hydrogen gas X
(fixed)
Standard, Trop, SOA, UCX
H2O H2O Water vapor 18 X X Standard, UCX
H2O2 H2O2 Hydrogen peroxide 34 X X X X X Standard, Trop, SOA, UCX
HAC HOCH2C(O)CH3 Hydroxyacetone 74 X X X X Standard, Trop, SOA, UCX
HCOOH HCOOH Formic acid X Standard, Trop, SOA, UCX
HC5 HOCH2CH=C(CH3)CHO Hydroxycarbonyl with 5C X Standard, Trop, SOA, UCX
HC5OO Peroxy radical from HC5 X Standard, Trop, SOA, UCX
HNO2 HONO Nitrous acid 47 X X X Standard, Trop, SOA, UCX
HNO3 HNO3 Nitric acid 63 X X X X X Standard, Trop, SOA, UCX
HNO4 HNO4 Pernitric acid 79 X X X Standard, Trop, SOA, UCX
HO2 HO2 Hydroperoxyl radical X Standard, Trop, SOA, UCX
IAP HOCH2C(CH3)(OOH)CH(OH)CHO Peroxide from IAO2 X X Standard, Trop, SOA, UCX
IEPOX Isoprene epoxide 118 X X X X Standard, Trop, SOA, UCX
IEPOXOO RO2 from IEPOX X Standard, Trop, SOA, UCX
INO2 O2NOCH2C(OO)(CH3)CH=CH2 RO2 from ISOP+NO3 X Standard, Trop, SOA, UCX
INPN O2NOCH2C(OOH)(CH3)CH=CH2 Peroxide from INO2 X Standard, Trop, SOA, UCX
ISN1 Nighttime isoprene nitrate X Standard, Trop, SOA, UCX
ISNOOA Peroxy radical from ISN1 X Standard, Trop, SOA, UCX
ISNOOB Peroxy radical from ISN1 X Standard, Trop, SOA, UCX
ISNOHOO Peroxy radical from ISN1 X Standard, Trop, SOA, UCX
ISNP HOCH2C(OOH)(CH3)CH(ONO2)CH2OH Peroxide from ISOPNBO2 and ISOPNDO2 X Standard, Trop, SOA, UCX
ISOP CH2=C(CH3)CH=CH2 Isoprene 12, 5C X X Standard, Trop, SOA, UCX
ISOPNB C5H9NO4 Isoprene nitrate Beta 147 X X X X X Standard, Trop, SOA, UCX
ISOPND C5H9NO4 Isoprene nitrate Delta 147 X X X X X Standard, Trop, SOA, UCX
KO2 RO2 from >3 ketones X Standard, Trop, SOA, UCX
MACR CH2=C(CH3)CHO Methacrolein 70 X X X X Standard, Trop, SOA, UCX
MACRN HOCH2C(ONO2)(CH3)CHO Nitrate from MVK 149 X X X X X Standard, Trop, SOA, UCX
MAN2 HOCH2C(ONO2)(CH3)CHO RO2 from MACR+NO3 X Standard, Trop, SOA, UCX
MAO3 CH2=C(CH3)C(O)OO Peroxyacyl from MVK and MACR X Standard, Trop, SOA, UCX
MAOP CH2=C(CH3)C(O)OOH Peroxide from MAO3 X X Standard, Trop, SOA, UCX
MAOPO2 CH2OH-CHOO*CH3C(O)OOH Peroxy radical from MAOP (addition on the double bond) X Standard, Trop, SOA, UCX
MAP CH3C(O)OOH Peroxyacetic acid 76 X X X X X Standard, Trop, SOA, UCX
MCO3 CH3C(O)O Peroxyacetyl radical X Standard, Trop, SOA, UCX
MEK RC(O)R Methyl Ethyl Ketone 12, 4C X X X Standard, Trop, SOA, UCX
MGLY CH3COCHO Methylglyoxyal X X Standard, Trop, SOA, UCX
MNO3 CH3ONO2 Methylnitrate X
(fixed)
Standard, Trop, SOA, UCX
MOBA HOC(=O)C(CH3)=CHCHO 5C acid from isoprene 114 X X X Standard, Trop, SOA, UCX
MOBAOO RO2 from MOBA X Standard, Trop, SOA, UCX
MO2 CH3O2 Methylperoxy radical X Standard, Trop, SOA, UCX
MOH CH3OH Methanol X Standard, Trop, SOA, UCX
MP CH3OOH Methylhydroperoxide 48 X X X X Standard, Trop, SOA, UCX
MRO2 HOCH2C(OO)(CH3)CHO RO2 from MACR+OH X Standard, Trop, SOA, UCX
MRP HOCH2C(OOH)(CH3)CHO Peroxide from MRO2 X X Standard, Trop, SOA, UCX
MSA CH4SO3 Methanesulfonic acid 96 X X X X Standard, Trop, SOA, UCX
MVK CH2=CHC(=O)CH3 Methylvinylketone 70 X X X X Standard, Trop, SOA, UCX
MVKN HOCH2CH(ONO2)C(=O)CH3 Nitrate from MACR 149 X X X X X Standard, Trop, SOA, UCX
N2 N2 Nitrogen X
(fixed)
Standard, Trop, SOA, UCX
N2O N2O Nitrous oxide 44 X X X Standard, Trop, SOA, UCX
N2O5 N2O5 Dinitrogen pentoxide 105 X X X X Standard, Trop, SOA, UCX
NH2 NH2 Ammonia radical X
(fixed)
Standard, Trop, SOA, UCX
NH3 NH3 Ammonia 17 X X X X Standard, Trop, SOA, UCX
NO NO Nitric oxide 30 X X X Standard, Trop, SOA, UCX
NO2 NO2 Nitrogen dioxide 46 X X X X Standard, Trop, SOA, UCX
NO3 NO3 Nitrate radical 62 X X X Standard, Trop, SOA, UCX
O2 O2 Molecular oxygen X
(fixed)
Standard, Trop, SOA, UCX
O3 O3 Ozone 48 X X X X Standard, Trop, SOA, UCX
OH OH Hydroxyl radical X Standard, Trop, SOA, UCX
PAN CH3C(O)OONO2 Peroxyacetylnitrate 121 X X X X Standard, Trop, SOA, UCX
PMN CH2=C(CH3)C(O)OONO2 Peroxymethacryloyl nitrate (MPAN) 147 X X X Standard, Trop, SOA, UCX
PO2 HOCH2CH(OO)CH3 RO2 from isoprene X Standard, Trop, SOA, UCX
PP HOCH2CH(OOH)CH3 Peroxide from PO2 X Standard, Trop, SOA, UCX
PPN CH3CH2C(O)OONO2 Peroxypropionylnitrate 135 X X X Standard, Trop, SOA, UCX
PRN1 O2NOCH2CH(OO)CH3 RO2 from propene + NO3 X Standard, Trop, SOA, UCX
PRPE C3H6 ≥C3 alkenes 12, 3C X X Standard, Trop, SOA, UCX
PRPN O2NOCH2CH(OOH)CH3 Peroxide from PRN1 X X Standard, Trop, SOA, UCX
PROPNN CH3C(=O)CH2ONO2 Propanone nitrate 119 X X X X X Standard, Trop, SOA, UCX
PYAC CH3COCOOH Pyruvic acid X Standard, Trop, SOA, UCX
R4N1 RO2 from R4N2 X Standard, Trop, SOA, UCX
R4N2 RO2NO ≥C4 alkylnitrates 119 X X X X Standard, Trop, SOA, UCX
R4O2 RO2 from ALK4 X Standard, Trop, SOA, UCX
R4P CH3CH2CH2CH2OOH Peroxide from R4O2 X Standard, Trop, SOA, UCX
RA3P CH3CH2CH2OOH Peroxide from A3O2 X X Standard, Trop, SOA, UCX
RB3P CH3CH(OOH)CH3 Peroxide from B3O2 X X Standard, Trop, SOA, UCX
RCHO CH3CH2CHO >C3 aldehydes 58 X X X Standard, Trop, SOA, UCX
RCO3 CH3CH2C(O)OO Peroxypropionyl radical X Standard, Trop, SOA, UCX
RCOOH C2H5C(O)OH >C2 organic acids X
(fixed)
Standard, Trop, SOA, UCX
RIO2 HOCH2C(OO)(CH3)CH=CH2 RO2 from isoprene (named as ISOPO2 in the literature) X Standard, Trop, SOA, UCX
RIP HOCH2C(OOH)(CH3)CH=CH2 Peroxide from RIO2 (named as ISOPOOH in the literature) 118 X X X X X Standard, Trop, SOA, UCX
ROH C3H7OH >C2 alcohols X Standard, Trop, SOA, UCX
RP CH3CH2C(O)OOH Peroxide from RCO3 X X Standard, Trop, SOA, UCX
SO2 SO2 Sulfur dioxide 64 X X X X Standard, Trop, SOA, UCX
SO4 SO4 Sulfate 96 X X X X Standard, Trop, SOA, UCX
VRO2 HOCH2CH(OO)C(O)CH3 RO2 from MVK+OH X Standard, Trop, SOA, UCX
VRP HOCH2CH(OOH)C(O)CH3 Peroxide from VRO2 X X Standard, Trop, SOA, UCX

--Melissa Sulprizio (talk) 22:17, 9 November 2016 (UTC)