Table 1.

The role of mitigation of carbonaceous aerosols from CC in achieving a 3.1 W m^-2 (500 ppm CO₂e) RF target in 2100.

	2100 CO2 targets		Change in timing of 50% CO2 target (years)
	RF(W m-2)	Conc. (ppm)
“Best” RF estimate (0.22 W m-2)
Full mitigation	2.21	420	—
Constant emission	2.00	404	8.4
A2	2.06	408	5.2
B1	2.11	413	3.1
“Low” RF estimate (0.02 W m-2)
Full mitigation	2.21	420	—
Constant emission	2.19	419	0.8
A2	2.19	419	0.8
B1	2.18	418	1.1
“High” RF estimate (0.37 W m-2)
Full mitigation	2.21	420	—
Constant emission	1.84	392	14.5
A2	1.94	399	10.9
B1	2.04	407	6.0

For each estimate of carbonaceous aerosol RF (best, low, high), we report the resulting targets for CO₂ RF and concentrations in 2100. In the constant emissions scenarios, carbonaceous aerosol emissions are maintained at 1996 levels. Change in timing of 50% CO₂ target records the number of years earlier than in the full mitigation scenario that CO₂ emissions must be cut to 50% of their 2005 levels to achieve the 3.1 W m^-2 (500 ppm CO₂e) RF target in 2100.