PM10and gaseous pollutants trends from air quality monitoring networks in Bari province: principal component analysis and absolute principal component scores on a two years and half data set

Table 1 Descriptive statistics for each parameter in each site

	Viale Archimede, Bari (urban site)			San Nicola sport stadium, Bari (suburban site)			Viale King, Bari (urban site)
	Data	Mean	STD. DEV.	Data	Mean	STD. DEV.	Data	Mean	STD. DEV.
*NOx*	7456	42.15	41.69	6648	24.65	32.82	7008	61.64	57.88
*Benzene*	7456	1.49	1.38	6648	1.08	1.48	7008	1.56	1.62
*Toluene*	7456	4.18	4.07	6648	2.40	4.02	7008	4.97	7.46
CO	7456	0.45	0.35	6648	0.44	0.18	7008	0.58	0.41
*PM10*	7456	29.71	14.36	6648	31.59	20.26	7008	25.66	16.08
	Altamura, prov. of Bari (urban site)			Andria, prov. of Bari (urban site)			Monopoli, prov. of Bari (urban site)
	Data	Mean	STD. DEV.	Data	Mean	STD. DEV.	Data	Mean	STD. DEV.
*NOx*	5136	46.12	40.08	5568	43.89	42.79	5244	50.65	47.60
*Benzene*	5136	1.83	1.62	5568	1.66	0.95	5244	1.98	1.06
*Toluene*	5136	6.74	9.27	5568	4.72	4.47	5244	4.98	4.18
CO	5136	0.43	0.32	5568	0.77	0.73	5244	0.46	0.34
*PM10*	5136	27.83	20.83	5568	22.00	14.63	5244	36.11	21.91

ISSN: 2661-801X