Sampling Sites	Click to rotate molecule	Concentration Units (Click to see graph)	Ozone Depletion Potential*	Atmospheric lifetime (years)**
Ozone O3		Dobson
Trichlorofluoromethane CCl3F CFC-11		ppt	1.0	45
Dichlorodifluoromethane CF2Cl2 CFC-12		ppt	0.82	100
Trichlorotrifluoroethane CCl2FCClF2 CFC-113		ppt	0.90	85
Carbon tetrachloride CCl4		ppt	1.20	35
Chloroform CHCl3		ppt		0.51
Dichloromethane CH2Cl2		ppt		0.46
Methyl chloride CH3Cl		ppt		1.3
Tetrachloroethene Cl2C=CCl2		ppt
Methyl chloroform CH3CCl3		ppt	0.12	4.8
Chlorodifluoromethane CHClF2 HCFC-22		ppt	0.034	11.9
Chlorodifluoroethane CH3CClF2 HCFC-142b		ppt	0.043	19
Dichlorofluoroethane CH3CFCl2 HCFC-141b		ppt	0.086	9.3
Tetrafluoroethane CH2FCF3 HFC-134a		ppt		13.8
Perfluoroethane CF3CF3		ppt		11,900
Bromochlorodifluoromethane) CBrClF2 Halon-1211		ppt	5.1	11
Dibromotetrafluoroethane) CBrF2CBrF2 Halon-2402		ppt	6.0	20
Bromotrifluoromethane CBrF3 Halon-1301		ppt	12	65
Sulfur hexafluoride SF6		ppt		3,200
Trifluoromethyl sulfur pentafluoride CF3SF5		ppt		~1000

^* The Ozone Depletion Potentials (ODP) is typically used to contrast different gases and provides a simple measure of the expected impact on ozone per unit mass emission of a gas relative to CFC-11 defined as 1.0. Scientific Assessment of Ozone Depletion: 1998. World Meteorological Organization (WMO) Global Ozone Research and Monitoring Program -- Report No. 44 (1999).

^** Atmospheric lifetimes (general term used for the "adjustment time", the time-scale characterizing the decay of an instantaneous pulse input into the reservoir) taken from Table 6.7, Climate Change 2001: The Scientific Basis . J.T. Houghton, Y. Ding, D. J. Griggs, M. Noguer, P. J. van der Linden, X. Da, K. Maskell, and C. A. Johnson for the Intergovernmental Panel on Climate Change.

References