| 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 |
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Slope direction/˚ | 0.114 | 1.000 |
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Gradient/˚ | 0.283 | 0.116 | 1.000 |
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Crown density | 0.122 | −0.688* | 0.218 | 1.000 |
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Freeze days/d | −0.395 | 0.029 | −0.455* | −0.264 | 1.000 |
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Thawing days/d | 0.643* | −0.447* | 0.011 | 0.460* | −0.127 | 1.000 |
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Freezing rate/cm・d−1 | 0.448* | −0.055 | 0.296 | 0.414 | −0.779* | 0.132 | 1.000 |
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Freezing rate/cm・d−1 | −0.424 | 0.711* | 0.134 | −0.613* | 0.151 | −0.859* | −0.223 | 1.000 |