Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway
Mountain slopes in periglacial environments are affected by frost- and gravity-driven processes that shape the landscape. Both rock glaciers and rockslides have been intensively inventoried worldwide. Although most inventories are traditionally based on morphologic criteria, kinematic approaches bas...
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ftdoajarticles:oai:doaj.org/article:1cca36e945a949b3b8e77e4092b938fe 2023-05-15T16:21:59+02:00 Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway Line Rouyet Karianne Staalesen Lilleøren Martina Böhme Louise Mary Vick Reynald Delaloye Bernd Etzelmüller Tom Rune Lauknes Yngvar Larsen Lars Harald Blikra 2021-11-01T00:00:00Z https://doi.org/10.3389/feart.2021.681088 https://doaj.org/article/1cca36e945a949b3b8e77e4092b938fe EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2021.681088/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.681088 https://doaj.org/article/1cca36e945a949b3b8e77e4092b938fe Frontiers in Earth Science, Vol 9 (2021) slope movements InSAR periglacial permafrost subarctic Norway Science Q article 2021 ftdoajarticles https://doi.org/10.3389/feart.2021.681088 2022-12-31T05:21:34Z Mountain slopes in periglacial environments are affected by frost- and gravity-driven processes that shape the landscape. Both rock glaciers and rockslides have been intensively inventoried worldwide. Although most inventories are traditionally based on morphologic criteria, kinematic approaches based on satellite remote sensing have more recently been used to identify moving landforms at the regional scale. In this study, we developed simplified Interferometric Synthetic Aperture Radar (InSAR) products to inventory ground velocity in a region in Northern Norway covering approximately 7,500 km2. We used a multiple temporal baseline InSAR stacking procedure based on 2015–2019 ascending and descending Sentinel-1 images to take advantage of a large set of interferograms and exploit different detection capabilities. First, moving areas are classified according to six velocity brackets, and morphologically associated to six landform types (rock glaciers, rockslides, glaciers/moraines, talus/scree deposits, solifluction/cryoturbation and composite landforms). The kinematic inventory shows that the velocity ranges and spatial distribution of the different types of slope processes vary greatly within the study area. Second, we exploit InSAR to update pre-existing inventories of rock glaciers and rockslides in the region. Landform delineations and divisions are refined, and newly detected landforms (54 rock glaciers and 20 rockslides) are incorporated into the databases. The updated inventories consist of 414 rock glacier units within 340 single- or multi-unit(s) systems and 117 rockslides. A kinematic attribute assigned to each inventoried landform documents the order of magnitude of the creep rate. Finally, we show that topo-climatic variables influence the spatial distribution of the rock glaciers. Their mean elevation increases toward the continental interior with a dominance of relict landforms close to the land-sea margin and an increased occurrence of active landforms further inland. Both rock glaciers and ... Article in Journal/Newspaper glacier Northern Norway permafrost Subarctic Directory of Open Access Journals: DOAJ Articles Norway Frontiers in Earth Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
slope movements InSAR periglacial permafrost subarctic Norway Science Q |
spellingShingle |
slope movements InSAR periglacial permafrost subarctic Norway Science Q Line Rouyet Karianne Staalesen Lilleøren Martina Böhme Louise Mary Vick Reynald Delaloye Bernd Etzelmüller Tom Rune Lauknes Yngvar Larsen Lars Harald Blikra Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway |
topic_facet |
slope movements InSAR periglacial permafrost subarctic Norway Science Q |
description |
Mountain slopes in periglacial environments are affected by frost- and gravity-driven processes that shape the landscape. Both rock glaciers and rockslides have been intensively inventoried worldwide. Although most inventories are traditionally based on morphologic criteria, kinematic approaches based on satellite remote sensing have more recently been used to identify moving landforms at the regional scale. In this study, we developed simplified Interferometric Synthetic Aperture Radar (InSAR) products to inventory ground velocity in a region in Northern Norway covering approximately 7,500 km2. We used a multiple temporal baseline InSAR stacking procedure based on 2015–2019 ascending and descending Sentinel-1 images to take advantage of a large set of interferograms and exploit different detection capabilities. First, moving areas are classified according to six velocity brackets, and morphologically associated to six landform types (rock glaciers, rockslides, glaciers/moraines, talus/scree deposits, solifluction/cryoturbation and composite landforms). The kinematic inventory shows that the velocity ranges and spatial distribution of the different types of slope processes vary greatly within the study area. Second, we exploit InSAR to update pre-existing inventories of rock glaciers and rockslides in the region. Landform delineations and divisions are refined, and newly detected landforms (54 rock glaciers and 20 rockslides) are incorporated into the databases. The updated inventories consist of 414 rock glacier units within 340 single- or multi-unit(s) systems and 117 rockslides. A kinematic attribute assigned to each inventoried landform documents the order of magnitude of the creep rate. Finally, we show that topo-climatic variables influence the spatial distribution of the rock glaciers. Their mean elevation increases toward the continental interior with a dominance of relict landforms close to the land-sea margin and an increased occurrence of active landforms further inland. Both rock glaciers and ... |
format |
Article in Journal/Newspaper |
author |
Line Rouyet Karianne Staalesen Lilleøren Martina Böhme Louise Mary Vick Reynald Delaloye Bernd Etzelmüller Tom Rune Lauknes Yngvar Larsen Lars Harald Blikra |
author_facet |
Line Rouyet Karianne Staalesen Lilleøren Martina Böhme Louise Mary Vick Reynald Delaloye Bernd Etzelmüller Tom Rune Lauknes Yngvar Larsen Lars Harald Blikra |
author_sort |
Line Rouyet |
title |
Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway |
title_short |
Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway |
title_full |
Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway |
title_fullStr |
Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway |
title_full_unstemmed |
Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway |
title_sort |
regional morpho-kinematic inventory of slope movements in northern norway |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.681088 https://doaj.org/article/1cca36e945a949b3b8e77e4092b938fe |
geographic |
Norway |
geographic_facet |
Norway |
genre |
glacier Northern Norway permafrost Subarctic |
genre_facet |
glacier Northern Norway permafrost Subarctic |
op_source |
Frontiers in Earth Science, Vol 9 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2021.681088/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.681088 https://doaj.org/article/1cca36e945a949b3b8e77e4092b938fe |
op_doi |
https://doi.org/10.3389/feart.2021.681088 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
_version_ |
1766009948489121792 |