Species in GEOS-Chem

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)