Trace Gases Measured by ACATS-IV and their Atmospheric Importance

Common Name	Formula	Sources	Atmospheric Importance
nitrous oxide	N2O	Natural, fertilizer application, animal waste	1,2
sulfur hexafluoride	SF6	Insulator in high voltage systems	2
CFC-12	CCl2F2	Refrigerant	1,2
halon-1211	CBrClF2	Fire extinguishing agent	1,2
CFC-11	CCl3F	Foam blowing agent	1,2
CFC-113	CCl2FCClF2	Solvent	1,2
chloroform	CHCl3	Natural, waste treatment, paper production	1
methyl chloroform	CH3CCl3	Solvent	1,2
carbon tetrachloride	CCl4	Solvent, feedstock for CFC production	1,2
hydrogen	H2	Hydrocarbon oxidation, combustion
methane	CH4	Natural, ruminant animals, combustion	2
carbon monoxide	CO	Combustion, hydrocarbon oxidation

1 - Breaks apart in the stratosphere and reacts with stratospheric ozone (Ozone Depletion)
2 - Absorbs longwave radiation and traps heat in the lower atmosphere (Greenhouse Gas)