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Radiative efficiency (RE) values used in this paper
| Direct RE (W m-2 ppb-1) | Relative direct + indirect RE (per ppb or molar basis) | Relative direct + indirect RE (per kg basis)* | |
| CO2 | 1.4 × 10-5 | 1 | 1 |
| CH4 | 3.7 × 10-4 | 37 | 102 |
*Obtained by multiplying the molar radiative efficiency by the ratio of molecular weights of CH4 and CO2.
