Mean photons per second per cm2

SD photons per second per cm2

Covariate

Statistic

Between- subjects

Within- subjects

Between- subjects

Within- subjects

Temperature of hour

F- statistic

46.3**

0.84

80.7**

2.83

2

0.81

0.018

0.88

0.057

Temperature, daily average

F- statistic

0.20

0.00

0.12

1.33

2

0.018

0.0001

0.011

0.028

Humidity of hour

F- statistic

47.6**

1.87

83.7**

4.60*

2

0.81

0.038

0.88

0.089

Humidity, daily average

F- statistic

4.48

1.00

5.64*

0.02

2

0.29

0.021

0.34

0.0005

Ap index of hour

F- statistic

4.31

11.6*

4.11

10.8*

2

0.28

0.20

0.27

0.19

Ap index, daily average

F- statistic

79.7**

4.93*

168.4**

3.81

2

0.88

0.095

0.94

0.075

Hour of measurement

F- statistic

30.1**

3.23

35.2**

3.82

2

0.73

0.064

0.76

0.075

Day of year

F- statistic

0.66

Cannot compute

0.53

Cannot compute

2

0.057

0.046