Table 1.

Descriptive statistics of particle number in different size bins.

Location	Size	Mean (cm−3)	Median (cm−3)	Max (cm−3)	Min (cm−3)	SD (cm−3)
Summer
Azadi terminal	0.3	231	154	517	148	91
	0.4	66	43	141	41	42
	0.5	20	14	45	13	13
	0.65	9	6	21	5	6
	0.8	6	4	14	2	4
	1	3	2	8	1	3
University of Tehran	0.3	125	78	363	66	117
	0.4	35	22	99	18	31
	0.5	9	6	25	4	8
	0.65	3	2	10	2	3
	0.8	2	1	6	1	2
	1	1	1	4	0	1
Four Ways Navab	0.3	195	139	450	116	130
	0.4	56	40	128	33	37
	0.5	15	11	35	9	10
	0.65	6	4	16	4	5
	0.8	4	3	11	2	3
	1	3	2	7	1	2
Winter
Azadi terminal	0.3	317	308	563	67	168
	0.4	105	103	201	18	60
	0.5	29	29	57	6	18
	0.65	9	7	17	3	5
	0.8	5	3	11	2	4
	1	2	2	7	1	2
University of Tehran	0.3	263	218	573	47	187
	0.4	138	76	402	13	147
	0.5	34	18	97	3	36
	0.65	9	7	22	1	8
	0.8	4	3	9	1	3
	1	2	1	4	1	1
Four Ways Navab	0.3	280	297	478	47	151
	0.4	91	98	176	13	55
	0.5	24	25	49	4	15
	0.65	7	6	13	2	5
	0.8	4	3	9	1	3
	1	2	2	4	1	1