Table 2. Present-Day (Year 2000) and Year 2100 Annual Mean Global Burdens of Anthropogenic Aerosols, Tropospheric Ozone, and Greenhouse Gas Mixing Ratios Used in This Studya



	Year 2000	Year 2100
Ammonium Sulfate, Tg	2.83	2.70
Ammonium Nitrate, Tg	0.66	2.82
POA, Tg	1.25	2.90
SOA, Tg	0.28	0.39
BC, Tg	0.23	0.53
Tropospheric O3, Tg	327	520
CO2, ppmv	367	836
CH4, ppbv	1760	3731
N2O, ppbv	316	447
Chlorofluorocarbon (CFC)-11, pptv	267	45
CFC-12, pptv	535	222


aEmissions are based on SRES A2 scenario; see Liao et al. [2006] for details of
anthropogenic aerosol and tropospheric O3 concentrations.