Black carbon
Radiative forcing
Estimates of black carbon's globally averaged direct radiative forcing vary from the IPCC’s estimate of + 0.34 watts per square meter (W/m²) ± 0.25, to a more recent estimate by V.

Black carbon

Section Title: Radiative forcing
Table Section Text: Estimates of black carbon's globally averaged direct radiative forcing vary from the IPCC’s estimate of + 0.34 watts per square meter (W/m²) ± 0.25, to a more recent estimate by V.

Component	IPCC (2007)	Hansen, et al. (2005)

CO2	1.66	1.50

BC	0.05-0.55	0.8

CH4	0.48	0.55

Tropospheric Ozone	0.35	0.40

Halocarbons	0.34	0.30

N2O	0.16	0.15

Sentence(s)

Black carbon with the IPCC's climate forcing estimates of 1.66 W/m² for CO₂ and 0.48 W/m² for CH₄.

final_sentence: Black carbon with the IPCC's climate forcing estimates of 1.66 W/m² for CO₂ and 0.48 W/m² for CH₄.