Table 27.1 - Mean atmospheric lifetimes of greenhouse gases with their global warming potentials (GWPs) relative to carbon dioxide

Source: IPCC, 1992

Gas Lifetime (years) GWP
CO2 50­200 1
CH4 10.5 63
N2O 132.0 270
CFC-11 55.0 4500
CFC-12 116.0 7100
CFC-113 110.0 4500
CFC-114 220.0 6000
CFC-115 550.0 5500
HCFC-22 15.8 4100
HCFC-123 1.7 310
HCFC-124 6.9 1500
HCFC-141 10.8 1500
HCFC-142 22.4 3700
HFC-125 40.5 4700
HFC-134 15.6 3200
HFC-143 64.2 4500
HFC-152 1.8 510
CCl4 47.0 1900
CH3CCl3 6.1 350
CF3Br 77.0 5800

Note: An integration time horizon of 20 years is assumed here.