Influence of snow depth distribution on surface roughness in alpine terrain: a multi-scale approach
In alpine terrain, the snow-covered winter surface deviates from its underlying summer terrain due to the progressive smoothing caused by snow accumulation. Terrain smoothing is believed to be an important factor in avalanche formation and avalanche dynamics, and it affects surface heat transfer, en...
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ftdoajarticles:oai:doaj.org/article:6c68d63a454e46a099a380a379e6649d 2023-05-15T18:32:31+02:00 Influence of snow depth distribution on surface roughness in alpine terrain: a multi-scale approach J. Veitinger B. Sovilla R. S. Purves 2014-04-01T00:00:00Z https://doi.org/10.5194/tc-8-547-2014 https://doaj.org/article/6c68d63a454e46a099a380a379e6649d EN eng Copernicus Publications http://www.the-cryosphere.net/8/547/2014/tc-8-547-2014.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-8-547-2014 https://doaj.org/article/6c68d63a454e46a099a380a379e6649d The Cryosphere, Vol 8, Iss 2, Pp 547-569 (2014) Environmental sciences GE1-350 Geology QE1-996.5 article 2014 ftdoajarticles https://doi.org/10.5194/tc-8-547-2014 2022-12-31T06:17:07Z In alpine terrain, the snow-covered winter surface deviates from its underlying summer terrain due to the progressive smoothing caused by snow accumulation. Terrain smoothing is believed to be an important factor in avalanche formation and avalanche dynamics, and it affects surface heat transfer, energy balance as well as snow depth distribution. To assess the effect of snow on terrain, we use an adequate roughness definition. We developed a method to quantify terrain smoothing by combining roughness calculations of snow surfaces and their corresponding underlying terrain with snow depth measurements. To this end, elevation models of winter and summer terrain in three selected alpine basins in the Swiss Alps characterized by low, medium and high terrain roughness were derived from high-resolution measurements performed by airborne and terrestrial lidar. The preliminary results in the selected basins reveal that, at basin scale, terrain smoothing depends not only on mean snow depth in the basin but also on its variability. The multi-temporal analysis over three winter seasons in one basin suggests that terrain smoothing can be modelled as a function of mean snow depth and its standard deviation using a power law. However, a relationship between terrain smoothing and snow depth was not found at pixel scale. Further, we show that snow surface roughness is to some extent persistent, even in-between winter seasons. Those persistent patterns might be very useful to improve the representation of a winter terrain without modelling of the snow cover distribution. This can for example improve avalanche release area definition and, in the long term, natural hazard management strategies. Article in Journal/Newspaper The Cryosphere Directory of Open Access Journals: DOAJ Articles The Cryosphere 8 2 547 569 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 J. Veitinger B. Sovilla R. S. Purves Influence of snow depth distribution on surface roughness in alpine terrain: a multi-scale approach |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
In alpine terrain, the snow-covered winter surface deviates from its underlying summer terrain due to the progressive smoothing caused by snow accumulation. Terrain smoothing is believed to be an important factor in avalanche formation and avalanche dynamics, and it affects surface heat transfer, energy balance as well as snow depth distribution. To assess the effect of snow on terrain, we use an adequate roughness definition. We developed a method to quantify terrain smoothing by combining roughness calculations of snow surfaces and their corresponding underlying terrain with snow depth measurements. To this end, elevation models of winter and summer terrain in three selected alpine basins in the Swiss Alps characterized by low, medium and high terrain roughness were derived from high-resolution measurements performed by airborne and terrestrial lidar. The preliminary results in the selected basins reveal that, at basin scale, terrain smoothing depends not only on mean snow depth in the basin but also on its variability. The multi-temporal analysis over three winter seasons in one basin suggests that terrain smoothing can be modelled as a function of mean snow depth and its standard deviation using a power law. However, a relationship between terrain smoothing and snow depth was not found at pixel scale. Further, we show that snow surface roughness is to some extent persistent, even in-between winter seasons. Those persistent patterns might be very useful to improve the representation of a winter terrain without modelling of the snow cover distribution. This can for example improve avalanche release area definition and, in the long term, natural hazard management strategies. |
format |
Article in Journal/Newspaper |
author |
J. Veitinger B. Sovilla R. S. Purves |
author_facet |
J. Veitinger B. Sovilla R. S. Purves |
author_sort |
J. Veitinger |
title |
Influence of snow depth distribution on surface roughness in alpine terrain: a multi-scale approach |
title_short |
Influence of snow depth distribution on surface roughness in alpine terrain: a multi-scale approach |
title_full |
Influence of snow depth distribution on surface roughness in alpine terrain: a multi-scale approach |
title_fullStr |
Influence of snow depth distribution on surface roughness in alpine terrain: a multi-scale approach |
title_full_unstemmed |
Influence of snow depth distribution on surface roughness in alpine terrain: a multi-scale approach |
title_sort |
influence of snow depth distribution on surface roughness in alpine terrain: a multi-scale approach |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/tc-8-547-2014 https://doaj.org/article/6c68d63a454e46a099a380a379e6649d |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 8, Iss 2, Pp 547-569 (2014) |
op_relation |
http://www.the-cryosphere.net/8/547/2014/tc-8-547-2014.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-8-547-2014 https://doaj.org/article/6c68d63a454e46a099a380a379e6649d |
op_doi |
https://doi.org/10.5194/tc-8-547-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
2 |
container_start_page |
547 |
op_container_end_page |
569 |
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