|
Variables
| |
Spring
|
Summer
|
Fall
|
Winter
|
|---|
|
O3 (μg/m3)
|
School 1
|
28.7 ± 2.7
|
28.1 ± 0.7
|
15.4 ± 0.1
|
20.2 ± 0.7
|
| |
School 2
|
17.6 ± 0.3
|
23.6 ± 1.6
|
39.8 ± 1.3
|
33.2 ± 1.9
|
| |
p*
|
0.001
|
0.001
|
0.001
|
0.001
|
|
SO2 (μg/m3)
|
School 1
|
31.2 ± 1.1
|
32.1 ± 0.7
|
27.2 ± 0.7
|
25.8 ± 0.4
|
| |
School 2
|
23.9 ± 1.1
|
23.0 ± 1.4
|
26.8 ± 1.6
|
35.6 ± 1.9
|
| |
p*
|
0.002
|
0.001
|
0.01
|
0.001
|
|
CO (ppm)
|
School 1
|
0.84 ± 0.09
|
0.37 ± 0.07
|
0.26 ± 0.01
|
0.81 ± 0.09
|
| |
School 2
|
1.4 ± 0.4
|
1.9 ± 0.9
|
2.4 ± 1.4
|
5.8 ± 0.9
|
| |
p*
|
0.001
|
0.001
|
0.001
|
0.001
|
|
NO (μg/m3)
|
School 1
|
18.4 ± 1.9
|
11.1 ± 0.4
|
4.7 ± 1.9
|
15.6 ± 1.3
|
| |
School 2
|
18.5 ± 1.7
|
6.6 ± 1.1
|
126.0 ± 7.7
|
65.4 ± 15.1
|
| |
p*
|
0.75
|
0.015
|
0.001
|
0.001
|
|
NO2 (μg/m3)
|
School 1
|
66.4 ± 4.2
|
12.4 ± 0.2
|
7.4 ± 0.2
|
14.9 ± 1.9
|
| |
School 2
|
6.3 ± 1.5
|
2.6 ± 0.6
|
51.6 ± 17.1
|
28.7 ± 3.0
|
| |
p*
|
0.001
|
0.024
|
0.001
|
0.002
|
|
NOx (μg/m3)
|
School 1
|
81.6 ± 6.9
|
19.6 ± 0.5
|
11.5 ± 0.2
|
27.8 ± 2.0
|
| |
School 2
|
24.6 ± 2.5
|
6.9 ± 1.3
|
156.1 ± 9.3
|
92.2 ± 21.4
|
| |
p*
|
0.001
|
0.018
|
0.001
|
0.001
|
|
PM10 (μg/m3)
|
School 1
|
77.9 ± 2.9
|
60.7 ± 1.4
|
41.7 ± 1.0
|
60.8 ± 3.3
|
| |
School 2
|
53.1 ± 24.4
|
11.3 ± 3.2
|
7.4 ± 0.7
|
77.9 ± 2.9
|
| |
p*
|
0.001
|
0.001
|
0.013
|
0.001
|
|
Temperature (°C)
|
School 1
|
19.3 ± 0.1
|
20.9 ± 0.1
|
20.2 ± 0.4
|
16.2 ± 0.7
|
| |
School 2
|
15.4 ± 0.5
|
16.8 ± 0.1
|
16.5 ± 0.1
|
12.1 ± 0.5
|
| |
p*
|
0.001
|
0.028
|
0.007
|
0.001
|
|
Relative humidity (%)
|
School 1
|
54.0 ± 0.9
|
52.9 ± 0.7
|
74.6 ± 0.1
|
65.7 ± 0.6
|
| |
School 2
|
50.9 ± 1.2
|
50.4 ± 2.3
|
74.0 ± 0.8
|
66.4 ± 2.5
|
| |
p*
|
0.02
|
0.078
|
0.129
|
0.001
|
- *p value for differences between schools
