This is a list of anthropogenic greenhouse gases as used by the IPCC TAR.
Gases relevant to radiative forcing only (per IPCC documentation)
The following table has its sources in the IPCC Fourth Assessment Report, 2007 [1], pg 141. The older data from 1998 has been left for reference.
| Concentrations and their changes | Radiative Forcing | |||
|---|---|---|---|---|
| Species | 2005 | Change since 1998 | 2005 (W m–2) | 1998 (%) |
| CO2 | 379 ± 0.65 ppm | +13 ppm | 1.66 | +13 |
| CH4 | 1,774 ± 1.8 ppb | +11 ppb | 0.48 | - |
| N2O | 319 ± 0.12 ppb | +5 ppb | 0.16 | +11 |
| CFC-11 | 251 ± 0.36 ppt | –13 | 0.063 | –5 |
| CFC-12 | 538 ± 0.18 ppt | +4 | 0.17 | +1 |
| CFC-113 | 79 ± 0.064 ppt | –4 | 0.024 | –5 |
| HCFC-22 | 169 ± 1.0 ppt | +38 | 0.033 | +29 |
| HCFC-141b | 18 ± 0.068 ppt | +9 | 0.0025 | +93 |
| HCFC-142b | 15 ± 0.13 ppt | +6 | 0.0031 | +57 |
| CH3CCl3 | 19 ± 0.47 ppt | –47 | 0.0011 | –72 |
| CCl4 | 93 ± 0.17 ppt | –7 | 0.012 | –7 |
| HFC-125 | 3.7 ± 0.10 ppt | +2.6 | 0.0009 | +234 |
| HFC-134a | 35 ± 0.73 ppt | +27 | 0.0055 | +349 |
| HFC-152a | 3.9 ± 0.11 ppt | +2.4 | 0.0004 | +151 |
| HFC-23 | 18 ± 0.12 ppt | +4 | 0.0033 | +29 |
| SF6 | 5.6 ± 0.038 ppt | +1.5 | 0.0029 | +36 |
| CF4 (PFC-14) | 74 ± 1.6 ppt | - | 0.0034 | - |
| C2F6 (PFC-116) | 2.9 ± 0.025 ppt | +0.5 | 0.0008 | +22 |
| Gas | Alternate Name | Formula | 1998 Level | Increase since 1750 | Radiative forcing (Wm-2) | Specific heat at STP
(J kg-1) |
|
|---|---|---|---|---|---|---|---|
| Carbon dioxide | Carbonic anhydride | (CO2) | 365ppm | 87ppm | 1.46 | 0.819 | |
| Carbon Monoxide | Carbonic Oxide | (CO) | 11.1ppm | 46ppb | 0.89 | 1.013 | |
| Methane | Marsh gas | (CH4) | 1,745ppb | 1,045ppb | 0.48 | 2.191 | |
| Nitrous oxide | Laughing gas | (N2O) | 314ppb | 44ppb | 0.15 | 0.88 | |
| Tetrafluoromethane | Carbon tetrafluoride | (CF4) | 80ppt | 40ppt | 0.003 | 1.33 | |
| Hexafluoroethane | Perfluoroethane | (C2F6) | 3 ppt | 3ppt | 0.001 | 0.067 | |
| Sulfur hexafluoride | Sulfur fluoride | (SF6) | 4.2ppt | 4.2ppt | 0.002 | 0.074 | |
| HFC-23* | Trifluoromethane | (CHF3) | 14ppt | 14ppt | 0.002 | 0.064 | |
| HFC-134a* | 1,1,1,2-tetrafluoroethane | 0.001(C2H2F4) | 7.5ppt | 7.5ppt | 0.001 | 0.007 | |
| HFC-152a* | 1,1-Difluoroethane | (C2H4F2) | 0.5ppt | 0.5ppt | 0.000 | 0.04 |
Gases relevant to radiative forcing and ozone depletion (per IPCC documentation)
| Gas | Alternate Name | Formula | 1998 Level | Increase since 1750 | Radiative forcing (Wm-2) |
|---|---|---|---|---|---|
| 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-Trichlorotrifluoromethane | (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 [2]. See also [3].
This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
