Table 3.

Correlation coefficients between PM_1.0 constituents and meteorological parameters in Tucson for different months between July 2012 and June 2013. Bold values are statistically significant at 95% confidence using a two-tailed Student's t-test.

		All (n = 68)	MJ (n = 19)	JAS (n = 28)	N (n = 5)	DJ (n = 16)
Meteorological	Temperature	0.51	0.32	0.21	−0.13	0.11
	RH	0.02	−0.05	−0.32	−0.15	−0.28
	WVMR	0.45	0.27	−0.37	−0.47	−0.08
PM1.0	Sulfate	0.92	0.83	0.96	0.95	0.72
	Ammonium	0.91	0.91	0.91	0.98	0.82
	Ni	0.55	0.49	0.28	0.61	−0.14
	Oxalate	0.54	0.40	0.34	0.67	0.08
	V	0.52	0.68	0.69	0.96	0.47
	Pb	0.48	−0.03	0.57	0.27	0.09
	Cu	0.48	0.22	0.14	0.46	−0.14
	MSA	0.42	0.69	0.60	0.29	0.12
	Fe	0.19	−0.03	0.51	0.38	−0.06
	Zn	0.19	0.08	−0.03	0.19	−0.08
	K	−0.19	0.38	0.15	−0.07	0.12
	Nitrate	−0.14	0.17	0.43	0.65	0.22
	Si	0.03	−0.17	0.35	0.93	−0.06