Chemistry:Physical properties of greenhouse gases
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The Physical Properties of Greenhouse Gases
| Gas | Alternate Name | Formula | 1998 Level | Increase since 1750 | Radiative forcing
(Wm−2) |
Specific heat at STP
(J kg−1) |
|---|---|---|---|---|---|---|
| Carbon dioxide | (CO2) | 365ppm | 87 ppm | 1.46 | 819 | |
| Methane | (CH4) | 1,745ppb | 1,045ppb | 0.48 | 2191 | |
| Nitrous oxide | (N2O) | 314ppb | 44ppb | 0.15 | 880 | |
| Tetrafluoromethane | Carbon tetrafluoride | (CF4) | 80ppt | 40ppt | 0.003 | 1330 |
| 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 | |
| Water vapour | (H2O(G)) | 2000 |
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