Carbonaceous Aerosols in Fine Particulate Matter of Santiago Metropolitan Area, Chile

Table 3

One-way ANOVA of seasonal and annual variability in PM_2.5, OC, and EC concentrations at the sites studied.

Station	Comparison criteria	PM2.5		OC		EC
		𝐹-test	𝑃 value	𝐹-test	𝑃 value	𝐹-test	𝑃 value
Las Condes^a	Between years^b	0.92	0.54	2.85	0.17	1.95	0.27
	Between seasons^c	91.5	2×10^−4	43.3	0.003	13.0	0.02
P. O’Higgins^a	Between years	0.73	0.63	0.91	0.54	0.99	0.51
	Between seasons	74.4	3×10^−4	137	8×10^−5	50.9	8×10^−4
Pudahuel^a	Between years	0.69	0.65	1.28	0.40	1.24	0.41
	Between seasons	253	2×10^−5	79.1	2×10^−4	25.7	3×10^−3
Average all stations	Between sites	9.56	0.001	4.18	0.029	6.10	0.008

aLabel of the stations in Figure 1. Las Condes: C Label, P. O’Higgins: O Label, and Pudahuel: P Label.
bFrom 2002 to 2007.
cBetween cool and warm seasons.