Altitude /m

Slope direction/˚

Gradient/˚

Crown density

Freeze days/d

Thawing days/d

Freezing rate/cm・d−1

Freezing rate/cm・d−1

Altitude/m

1.000

Slope direction/˚

0.114

1.000

Gradient/˚

0.283

0.116

1.000

Crown density

0.122

−0.688*

0.218

1.000

Freeze days/d

−0.395

0.029

−0.455*

−0.264

1.000

Thawing days/d

0.643*

−0.447*

0.011

0.460*

−0.127

1.000

Freezing rate/cm・d−1

0.448*

−0.055

0.296

0.414

−0.779*

0.132

1.000

Freezing rate/cm・d−1

−0.424

0.711*

0.134

−0.613*

0.151

−0.859*

−0.223

1.000