Text table 4
Global warming potentials and atmospheric lifetimes
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| Greenhouse gas | Formula | 100-year global warming potential | Atmospheric lifetime (years) |
|---|---|---|---|
| Carbon dioxide | CO2 | 1 | variable |
| Methane | CH4 | 21 | 12 ± 3 |
| Nitrous oxide | N2O | 310 | 120 |
| Sulphur hexafluoride | SF6 | 23,900 | 3,200 |
| Hydrofluorocarbons (HFCs) | |||
| HFC-23 | CHF3 | 11,700 | 264 |
| HFC-32 | CH2F2 | 650 | 5.6 |
| HFC-41 | CH3F | 150 | 3.7 |
| HFC-43-10mee | C5H2F10 | 1,300 | 17.1 |
| HFC-125 | C2HF5 | 2,800 | 32.6 |
| HFC-134 | C2H2F4 (CHF2CHF2) | 1,000 | 10.6 |
| HFC-134a | C2H2F4 (CH2FCF3) | 1,300 | 14.6 |
| HFC-143 | C2H3F3 (CHF2CH2F) | 300 | 1.5 |
| HFC-143a | C2H3F3 (CF3CH3) | 3,800 | 3.8 |
| HFC-152a | C2H4F2 (CH3CHF2) | 140 | 48.3 |
| HFC-227ea | C3HF7 | 2,900 | 36.5 |
| HFC-236fa | C3H2F6 | 6,300 | 209 |
| HFC-245ca | C3H3F5 | 560 | 6.6 |
| Perfluorocarbons (PFCs) | |||
| Perfluoromethane | CF4 | 6,500 | 50,000 |
| Perfluoroethane | C2F6 | 9,200 | 10,000 |
| Perfluoropropane | C3F8 | 7,000 | 2,600 |
| Perfluorobutane | C4F10 | 7,000 | 2,600 |
| Perfluorocyclobutane | c-C4F8 | 8,700 | 3,200 |
| Perfluoropentane | C5F12 | 7,500 | 4,100 |
| Perfluorohexane | C6F14 | 7,400 | 3,200 |
| Source: Environment Canada, 2007 | |||
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