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Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Sites, latitude, longitude, and climate factors form April 2004 to March 2009, and PC1 score at the eight sites

From: Effectiveness of principal component analysis for analyzing particleboard subjected to outdoor exposure

Site no.

Site

North latitude (°)

East longitude (°)

Climate factor

PC1 score

T

S

P

Mean (°C)

SD (°C)

COV (%)

Mean (h)

SD (h)

COV (%)

Mean (mm)

SD (mm)

COV (%)

1

Asahikawa

43

142

7.2

0.31

4.2

1598

76.2

4.77

946

91.2

9.65

−2.37

2

Noshiro

40

140

11.5

0.23

2.0

1444

126.0

8.72

1470

193.4

13.2

−1.47

3

Morioka

39

141

10.5

0.25

2.4

1691

62.3

3.68

1315

153.1

11.6

−1.15

4

Tsukuba

36

140

14.3

0.34

2.3

1963

175.4

8.94

1399

252.2

18.0

0.38

5

Maniwa (Tsuyama)a

35

133

14.2

0.21

1.5

1781

50.8

2.85

1274

252.7

19.8

−0.25

6

Okayama

34

133

16.7

0.19

1.2

2026

62.3

3.08

1057

299.1

28.3

0.68

7

Shizuoka

34

138

16.9

0.36

2.1

2104

123.2

5.86

2302

660.2

28.7

2.11

8

Miyakonojo

31

131

17.0

0.19

1.1

1989

118.0

5.93

2566

433.8

16.9

2.06

  1. The PC1 score was calculated using the standardized T, S, and P
  2. SD standard deviation, COV coefficient of variance, T annual mean temperature, S annual sunshine duration, P annual precipitation, PC1 first principal component
  3. aTsuyama is located near Maniwa. Owing to a lack of climate factors for Maniwa, climate factors for Tsuyama were used instead
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