Table 1. Trimodal Lognormal Aerosol Size Distributions Used in This Studya

Aerosol Type	Nuclei Mode	Accumulation Mode	Coarse Mode
	Dg	sigma	Nap	chiSO4	Dg	sigma	Nap	chiSO4	Dg	sigma	Nap	chiSO4
Marine	0.020	1.47	230	0.33	0.092	1.60	177	0.33	0.580	2.49	3.10	0.95
Continental	0.016	1.60	1000	0.50	0.067	2.10	800	0.50	0.930	2.20	0.72	0.50

aDg is the modal geometric mean diameter (mum), Nap is the mode concentration (cm-3), sigma is the geometric standard deviation, and chiSO4 is the sulfate mass fraction. Distributions obtained from Whitby [1978].