Identification of the Aerosol Types over Athens, Greece: The Influence of Air-Mass Transport

Table 1

Mean values of AOD₅₅₀ and FM fraction for all aerosol types over GAA. These values correspond to the whole dataset. The number and the relative frequency of the trajectories from each sector are also given for the three altitude levels: 500 m, 1000 m, and 4000 m.

Trajectory altitude		AOD550	FM	Year	Winter	Spring	Summer	Autumn
500 m	A	0.38±0.13	0.61±0.10	155 (16%)	16%	25%	25%	34%
	B	0.34±0.10	0.58±0.12	87 (9%)	33%	18%	20%	29%
	C	0.36±0.16	0.59±0.12	317 (33%)	16%	21%	39%	24%
	D	0.39±0.11	0.65±0.10	285 (30%)	8%	33%	35%	24%
	E	0.37±0.10	0.64±0.09	118 (12%)	8%	34%	26%	31%
1000 m	A	0.38±0.12	0.61±0.10	196 (20%)	15%	26%	24%	36%
	B	0.34±0.09	0.58±0.12	108 (11%)	28%	15%	25%	32%
	C	0.36±0.17	0.60±0.12	333 (35%)	15%	24%	39%	23%
	D	0.39±0.12	0.65±0.10	228 (24%)	8%	32%	36%	23%
	E	0.37±0.11	0.65±0.11	97 (10%)	10%	32%	26%	32%
4000 m	A	0.39±0.13	0.60±0.12	233 (24%)	16%	31%	25%	27%
	B	0.34±0.10	0.60±0.12	477 (50%)	16%	23%	32%	29%
	C	0.35±0.09	0.63±0.10	166 (17%)	10%	25%	40%	25%
	D	0.37±0.11	0.63±0.12	51 (5%)	8%	41%	31%	20%
	E	0.40±0.16	0.65±0.11	35 (4%)	0%	23%	49%	29%