IPCC list of greenhouse gases
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This is a list of anthropogenic greenhouse gases as used by the IPCC TAR. Even though it contributes the majority of the greenhouse effect, water vapor is not listed here as human activity doesn't contribute directly to increased atmospheric levels as with the compounds listed below.
[edit] Gases relevant to radiative forcing only (per IPCC documentation)
| Gas | Alternate Name | Formula | 1998 Level | Increase since 1750 | Radiative forcing (Wm2) |
|---|---|---|---|---|---|
| Carbon dioxide | (CO2) | 365ppm | 87 ppm | 1.46 | |
| Methane | (CH4) | 1,745ppb | 1,045ppb | 0.48 | |
| Nitrous oxide | (N2O) | 314ppb | 44ppb | 0.15 | |
| Tetrafluoromethane | Carbon tetrafluoride | (CF4) | 80ppt | 40ppt | 0.003 |
| Hexafluoroethane | (C2F6) | 3 ppt | 3ppt | 0.001 | |
| Sulfur hexafluoride | (SF6) | 4.2ppt | 4.2ppt | 0.002 | |
| HFC-23* | Trifluoromethane | (CHF3) | 14ppt | 14ppt | 0.002 |
| HFC-134a* | 1,1,1,2-tetrafluoroethane | (C2H2F4) | 7.5ppt | 7.5ppt | 0.001 |
| HFC-152a* | 1,1-Difluoroethane | (C2H4F2) | 0.5ppt | 0.5ppt | 0.000 |
[edit] Gases relevant to radiative forcing and ozone depletion (per IPCC documentation)
| Gas | Alternate Name | Formula | 1998 Level | Increase since 1750 | Radiative forcing (Wm2) |
|---|---|---|---|---|---|
| CFC-11 | Trichlorofluoromethane | (CFCl3) | 268ppt | 268ppt | 0.07 |
| CFC-12 | Dichlorodifluoromethane | (CF2Cl2) | 533ppt | 533ppt | 0.17 |
| CFC-13 | Chlorotrifluoromethane | (CClF3) | 4ppt | 4ppt | 0.001 |
| CFC-113 | 1,1,1-Trichlorotrifluoroethane | (C2F3Cl3) | 84ppt | 84ppt | 0.03 |
| CFC-114 | 1,2-Dichlorotetrafluoroethane | (C2F4Cl2) | 15ppt | 15ppt | 0.005 |
| CFC-115 | Chloropentafluoroethane | (C2F5Cl) | 7ppt | 7ppt | 0.001 |
| Carbon tetrachloride | Tetrachloromethane | (CCl4) | 102ppt | 102ppt | 0.01 |
| 1,1,1-Trichloroethane | Methyl chloroform | (CH3CCl3) | 69ppt | 69ppt | 0.004 |
| HCFC-141b | 1,1-Dichloro-1-Fluoroethane | (C2H3FCl2) | 10ppt | 10ppt | 0.001 |
| HCFC-142b | 1-Chloro-1,1-Difluoroethane | (C2H3F2Cl) | 11ppt | 11ppt | 0.002 |
| Halon-1211 | Bromochlorodifluoromethane | (CClF2Br) | 3.8ppt | 3.8ppt | 0.001 |
| Halon-1301 | Bromotrifluoromethane | (CF3Br) | 2.5ppt | 2.5ppt | 0.001 |
(Source: IPCC radiative forcing report 1994 updated (to 1998) by IPCC TAR table 6.1 [1]. See also [2].
