Seasons

Average plume rises during weekdays (m)

Sample size

Standard error (m)

Average plume rises during weekends (m)

Sample size

Standard error (m)

Fall 08

2.02

4

2.02

19.76

16

9.53

Winter 08

6.23

11

9.79

12.60

4

7.93

Spring 09

12.78

23

10.20

24.91

10

13.39

Summer 09

14.10

14

10.80

14.90

5

8.30