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Column amounts to raise grey opacity of a doubled terrestrial atmosphere to 3; lifetimes in present terrestrial atmosphere
| Gas | Suggested column per m2 | Lifetime against photolysis, yr |
|---|---|---|
| CF3CF2CF3 | 1.1 × 1022 | >1 × 108 |
| CF3SCF2CF3 | 1.4 × 1022 | 8950 |
| SF6 | 5.2 × 1021 | 3200* |
| SF5CF3 | 1.0 × 1022 | 4050 |
| SF4(CF3)2 | 8.0 × 1021 | 3070 |
Includes reaction with mesophere's free electrons.
