Table 2.

Global radiative forcing (with respect to pre-industrial) and atmospheric concentrations of greenhouse gases with the baseline and scenarios for methane change described in this paper.

				CLE				MFR
Year		1750	2011	2100
Scenario				I	II	III	IV	I	II	III	IV
CH4	RF W/m2	—	0.61	1.00	1.07	1.15	1.21	0.42	0.52	0.61	0.70
	ppb	722	1803	2842	3060	3284	3511	1423	1616	1816	2021
CO2	RF W/m2	—	1.83	4.87	4.87	4.87	4.87	2.24	2.24	2.24	2.24
	ppm	278	391	670	670	670	670	421	421	421	421
Changed CH4 forcing with respect to CLE/scenario I	%				7	14	21	−58	−48	−39	−30

All RF values (also the ones for 2011) were calculated with the equations of Etminan et al.²⁹.