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Snow gliding on a south-facing slope covered with larch trees

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Abstract

Context

Snow gliding is a downhill motion of snow on the ground; observations have shown gliding to be possible not only on open slopes but also in forest stands. Larch stands, with their low canopy density and open forest structure with clearings and gaps, are particularly prone to high glide rates. Snow gliding may have negative effects on juvenescent trees which can be damaged by extraction from the ground.

Aim

The goal of this study was to determine whether snow gliding depends on forest cover (canopy) and size of clearings.

Methods

Snow gliding was measured during eight winter periods at six measuring positions (ranging from ‘dense forest’ to ‘open slope’) in and beside a larch stand in the Stubai Valley, Tyrol, Austria.

Results

The results showed that gliding is strongly influenced by forest cover. Snow gliding increases with decreasing canopy density. The difference between the six measuring positions was highly significant (p < 0.005).

Conclusion

The identified glide cracks on at least two measuring positions, indicating extreme glide rates and, therefore, strong negative effects on juvenescent trees. To prevent glide rates of a magnitude such as this requires a mature forest with at least 300 stems/ha.

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Acknowledgments

I am grateful to R. Hacker who supported the statistical analysis of the data.

Funding

This work was funded by the Austrian Research Centre for Forests.

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Correspondence to Peter Höller.

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Handling Editor: Barry Alan Gardiner

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Höller, P. Snow gliding on a south-facing slope covered with larch trees. Annals of Forest Science 71, 81–89 (2014). https://doi.org/10.1007/s13595-013-0333-5

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  • DOI: https://doi.org/10.1007/s13595-013-0333-5

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