Number Size Distribution of Ambient Particles in a Typical Urban Site: The First Polish Assessment Based on Long-Term (9 Months) Measurements

Table 1

Descriptive statistics for sets of 1-hour (1 h) number concentrations of PM in Zabrze.

Impactor stage^a	Period	Number of 1 h concentration^c	Time coverage	Min.; (1/cm^3)	Max.; (1/cm^3)	Arithmetic mean; (1/cm^3)	Standard deviation; (1/cm^3)	25th percentile; (1/cm^3)	Median; (1/cm^3)	75th percentile; (1/cm^3)
0.028	MP^b	5310	79.02	0	28384.85	1371.99	1237.34	560.46	1033.41	1771.27
	S^b	3544	80.69	0	28384.85	1278.74	1203.52	523.62	949.54	1662.41
	W^b	1766	75.86	31.08	8327.33	1559.14	1282.26	665.17	1197.88	1971.05
0.056	MP^b	5310	79.02	0.88	16029.78	1393.02	1213.68	583.46	1038.97	1778.77
	S^b	3544	80.69	0.88	16029.78	1183.3	945.08	535.59	928.68	1532.3
	W^b	1766	75.86	52.86	11797.33	1813.88	1539.9	733.95	1353.75	2428.77
0.095	MP^b	5310	79.02	0.11	11696.4	1095.46	1068.7	435.62	788.77	1364.62
	S^b	3544	80.69	0.11	5890.98	839.54	645.6	385.89	656.22	1101.94
	W^b	1766	75.86	40.42	11696.4	1609.04	1484.08	638.22	1160.83	2047.33
0.157	MP^b	5310	79.02	0	10527.43	1048.02	1006.06	431.01	736.69	1294.71
	S^b	3544	80.69	0	5792.17	796.79	599.59	390.39	620.32	1022.84
	W^b	1766	75.86	36.22	10527.43	1552.18	1393.23	611.02	1141.64	1954.01
0.263	MP^b	5310	79.02	0	7630.67	703.28	751.47	266.3	444.91	844.75
	S^b	3544	80.69	0	4611.7	470.64	373.48	233.6	362.92	576.57
	W^b	1766	75.86	23.28	7630.67	1170.15	1044.74	454.13	860.67	1495.18
0.384	MP^b	5310	79.02	0	17493.35	437.58	561.78	147.61	260.37	519.61
	S^b	3544	80.69	0	17493.35	278.9	414.94	125.48	199	321.45
	W^b	1766	75.86	27.85	4991.05	756.01	671.94	308.15	551.11	931.84
0.617	MP^b	5310	79.02	0	1650.12	134.19	173.97	35.18	69.42	161.02
	S^b	3544	80.69	0	892.51	77.78	97.28	27.29	46.56	83.45
	W^b	1766	75.86	10.61	1650.12	247.39	229.8	101.96	172.83	296.2
0.954	MP^b	5310	79.02	0	539.66	35.09	53.9	5	13.4	44.19
	S^b	3544	80.69	0	258.86	16.77	27.92	3.36	7.17	16.03
	W^b	1766	75.86	0.33	539.66	71.85	71.75	25.75	50.53	88.06
1.61	MP^b	5310	79.02	0	114.04	6.42	10.12	1.25	2.61	7.54
	S^b	3544	80.69	0	47.36	3.07	4.48	0.94	1.64	3.02
	W^b	1766	75.86	0.38	114.04	13.15	14.14	4.41	8.68	15.64
2.41	MP^b	5310	79.02	0	40.25	2.15	3.42	0.52	0.99	2.34
	S^b	3544	80.69	0	14.24	1.09	1.36	0.4	0.68	1.17
	W^b	1766	75.86	0.14	40.25	4.27	4.96	1.46	2.59	4.96
4.02	MP^b	5310	79.02	0	5.71	0.3	0.5	0.07	0.15	0.32
	S^b	3544	80.69	0	2.79	0.17	0.23	0.04	0.1	0.19
	W^b	1766	75.86	0	5.71	0.57	0.74	0.18	0.3	0.63
6.63	MP^b	5310	79.02	0	13.47	0.16	0.31	0.04	0.09	0.17
	S^b	3544	80.69	0	13.47	0.11	0.3	0.03	0.06	0.12
	W^b	1766	75.86	0	2.28	0.25	0.31	0.09	0.13	0.28

aCut-off diameter of the impactor stage to which the line refers.
bMP: measurement period: January 1, 2010–October 7, 2010; S: summer, April 1, 2010–September 30, 2010; W: winter: January 1, 2010–March 31, 2010, and October 1, 2010–October 7, 2010.
cArithmetic means for hours with at least 45 1-minute measurements.