Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape
Periglacial environments are characterized by highly dynamic landscapes. Freezing and thawing lead to ground movement, associated with cryoturbation and solifluction. These processes are sensitive to climate change and variably distributed depending on multiple environmental factors. In this study,...
Published in: | Journal of Geophysical Research: Earth Surface |
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Online Access: | https://hdl.handle.net/11250/2771096 https://doi.org/10.1029/2021JF006175 |
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ftnorce:oai:norceresearch.brage.unit.no:11250/2771096 2023-05-15T15:09:23+02:00 Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape Rouyet, Line Karjalainen, Olli Niittynen, P. Aalto, Juha Luoto, Miska Lauknes, Tom Rune Larsen, Yngvar Hjort, J. 2021 application/pdf https://hdl.handle.net/11250/2771096 https://doi.org/10.1029/2021JF006175 eng eng Norges forskningsråd: 263005 Journal of Geophysical Research (JGR): Earth Surface. 2021, 126 (7), . urn:issn:2169-9003 https://hdl.handle.net/11250/2771096 https://doi.org/10.1029/2021JF006175 cristin:1925282 CC BY-NC-ND 4.0 https://creativecommons.org/licenses/by-nc-nd/4.0/ © 2021, Author(s) CC-BY-NC-ND Journal of Geophysical Research (JGR): Earth Surface 126 7 24 Peer reviewed Journal article 2021 ftnorce https://doi.org/10.1029/2021JF006175 2022-10-13T05:50:34Z Periglacial environments are characterized by highly dynamic landscapes. Freezing and thawing lead to ground movement, associated with cryoturbation and solifluction. These processes are sensitive to climate change and variably distributed depending on multiple environmental factors. In this study, we used multi-geometry Sentinel-1 Synthetic Aperture Radar Interferometry (InSAR) to investigate the spatial distribution of the mean annual ground velocity in a mountainous landscape in Northern Norway. Statistical modeling was employed to examine how periglacial ground velocity is related to environmental variables characterizing the diverse climatic, geomorphic, hydrological and biological conditions within a 148 km2 study area. Two-dimensional (2D) InSAR results document mean annual ground velocity up to 15 mm/yr. Vertical and horizontal velocity components in the East–West plane show variable spatial distribution, which can be explained by the characteristics of cryoturbation and solifluction operating differently over flat and sloping terrain. Statistical modeling shows that slope angle and mean annual air temperature variables are the most important environmental factors explaining the distribution of the horizontal and vertical components, respectively. Vegetation and snow cover also have a local influence, interpreted as indicators of the ground material and moisture conditions. The results show contrasted model performance depending on the velocity component used as a response variable. In general, our study highlights the potential of integrating radar remote sensing and statistical modeling to investigate mountainous regions and better understand the relations between environmental factors, periglacial processes and ground dynamics publishedVersion Article in Journal/Newspaper Arctic Climate change Northern Norway NORCE vitenarkiv (Norwegian Research Centre) Arctic Norway Journal of Geophysical Research: Earth Surface 126 7 |
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Open Polar |
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NORCE vitenarkiv (Norwegian Research Centre) |
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ftnorce |
language |
English |
description |
Periglacial environments are characterized by highly dynamic landscapes. Freezing and thawing lead to ground movement, associated with cryoturbation and solifluction. These processes are sensitive to climate change and variably distributed depending on multiple environmental factors. In this study, we used multi-geometry Sentinel-1 Synthetic Aperture Radar Interferometry (InSAR) to investigate the spatial distribution of the mean annual ground velocity in a mountainous landscape in Northern Norway. Statistical modeling was employed to examine how periglacial ground velocity is related to environmental variables characterizing the diverse climatic, geomorphic, hydrological and biological conditions within a 148 km2 study area. Two-dimensional (2D) InSAR results document mean annual ground velocity up to 15 mm/yr. Vertical and horizontal velocity components in the East–West plane show variable spatial distribution, which can be explained by the characteristics of cryoturbation and solifluction operating differently over flat and sloping terrain. Statistical modeling shows that slope angle and mean annual air temperature variables are the most important environmental factors explaining the distribution of the horizontal and vertical components, respectively. Vegetation and snow cover also have a local influence, interpreted as indicators of the ground material and moisture conditions. The results show contrasted model performance depending on the velocity component used as a response variable. In general, our study highlights the potential of integrating radar remote sensing and statistical modeling to investigate mountainous regions and better understand the relations between environmental factors, periglacial processes and ground dynamics publishedVersion |
format |
Article in Journal/Newspaper |
author |
Rouyet, Line Karjalainen, Olli Niittynen, P. Aalto, Juha Luoto, Miska Lauknes, Tom Rune Larsen, Yngvar Hjort, J. |
spellingShingle |
Rouyet, Line Karjalainen, Olli Niittynen, P. Aalto, Juha Luoto, Miska Lauknes, Tom Rune Larsen, Yngvar Hjort, J. Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape |
author_facet |
Rouyet, Line Karjalainen, Olli Niittynen, P. Aalto, Juha Luoto, Miska Lauknes, Tom Rune Larsen, Yngvar Hjort, J. |
author_sort |
Rouyet, Line |
title |
Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape |
title_short |
Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape |
title_full |
Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape |
title_fullStr |
Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape |
title_full_unstemmed |
Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape |
title_sort |
environmental controls of insar-based periglacial ground dynamics in a sub-arctic landscape |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2771096 https://doi.org/10.1029/2021JF006175 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Climate change Northern Norway |
genre_facet |
Arctic Climate change Northern Norway |
op_source |
Journal of Geophysical Research (JGR): Earth Surface 126 7 24 |
op_relation |
Norges forskningsråd: 263005 Journal of Geophysical Research (JGR): Earth Surface. 2021, 126 (7), . urn:issn:2169-9003 https://hdl.handle.net/11250/2771096 https://doi.org/10.1029/2021JF006175 cristin:1925282 |
op_rights |
CC BY-NC-ND 4.0 https://creativecommons.org/licenses/by-nc-nd/4.0/ © 2021, Author(s) |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1029/2021JF006175 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
126 |
container_issue |
7 |
_version_ |
1766340596468809728 |