Old Rocks
Diamond Member
Relevant to radiative forcing Gas Current (1998) Amount by volume Increase (ppm)
over pre-industrial (1750) Increase (%)
over pre-industrial (1750) Radiative forcing (W/m2)
Carbon dioxide 365 ppm
(383 ppm, 2007.01) 87 ppm
(105 ppm, 2007.01) 31%
(38%, 2007.01) 1.46
(~1.53, 2007.01)
Methane 1745 ppb 1045 ppb 67% 0.48
Nitrous oxide 314 ppb 44 ppb 16% 0.15
Relevant to both radiative forcing and ozone depletion; all of the following have no natural sources and hence zero amounts pre-industrial Gas Current (1998)
Amount by volume Radiative forcing
(W/m2)
CFC-11 268 ppt 0.07
CFC-12 533 ppt 0.17
CFC-113 84 ppt 0.03
Carbon tetrachloride 102 ppt 0.01
HCFC-22 69 ppt 0.03
(Source: IPCC radiative forcing report 1994 updated (to 1998) by IPCC TAR table 6.1[41][42] ).
over pre-industrial (1750) Increase (%)
over pre-industrial (1750) Radiative forcing (W/m2)
Carbon dioxide 365 ppm
(383 ppm, 2007.01) 87 ppm
(105 ppm, 2007.01) 31%
(38%, 2007.01) 1.46
(~1.53, 2007.01)
Methane 1745 ppb 1045 ppb 67% 0.48
Nitrous oxide 314 ppb 44 ppb 16% 0.15
Relevant to both radiative forcing and ozone depletion; all of the following have no natural sources and hence zero amounts pre-industrial Gas Current (1998)
Amount by volume Radiative forcing
(W/m2)
CFC-11 268 ppt 0.07
CFC-12 533 ppt 0.17
CFC-113 84 ppt 0.03
Carbon tetrachloride 102 ppt 0.01
HCFC-22 69 ppt 0.03
(Source: IPCC radiative forcing report 1994 updated (to 1998) by IPCC TAR table 6.1[41][42] ).