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/10037/22099 https://doi.org/10.1029/2021JF006175 |
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ftunivtroemsoe:oai:munin.uit.no:10037/22099 2023-05-15T14:25:11+02:00 Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape Rouyet, L. Karjalainen, Olli Niittynen, P. Aalto, Juha Luoto, Miska Lauknes, T.R. Larsen, Y. Hjort, J. 2021-07-10 https://hdl.handle.net/10037/22099 https://doi.org/10.1029/2021JF006175 eng eng Wiley Journal of Geophysical Research (JGR): Earth Surface Norges forskningsråd: 263005 info:eu-repo/grantAgreement/RCN/ROMFORSK/263005/Norway/FrostInSAR: Upscaling the investigation of periglacial landforms in the Norwegian Arctic using Synthetic Aperture Radar Interferometry// info:eu-repo/grantAgreement/RCN/ROMFORSK/212022/Norway/PermaSAR: SAR detection of permafrost landscape changes in northern Norway and on Svalbard// Rouyet, Karjalainen, Niittynen, Aalto, Luoto, Lauknes, Larsen, Hjort. Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape. Journal of Geophysical Research (JGR): Earth Surface. 2021;126(7) FRIDAID 1925282 doi:10.1029/2021JF006175 2169-9003 2169-9011 https://hdl.handle.net/10037/22099 openAccess Copyright 2021 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.1029/2021JF006175 2021-08-18T22:53:41Z 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 Article in Journal/Newspaper Arctic Arctic Climate change Northern Norway University of Tromsø: Munin Open Research Archive Arctic Norway Journal of Geophysical Research: Earth Surface 126 7 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Rouyet, L. Karjalainen, Olli Niittynen, P. Aalto, Juha Luoto, Miska Lauknes, T.R. Larsen, Y. Hjort, J. Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
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 |
format |
Article in Journal/Newspaper |
author |
Rouyet, L. Karjalainen, Olli Niittynen, P. Aalto, Juha Luoto, Miska Lauknes, T.R. Larsen, Y. Hjort, J. |
author_facet |
Rouyet, L. Karjalainen, Olli Niittynen, P. Aalto, Juha Luoto, Miska Lauknes, T.R. Larsen, Y. Hjort, J. |
author_sort |
Rouyet, L. |
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 |
publisher |
Wiley |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/22099 https://doi.org/10.1029/2021JF006175 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Arctic Climate change Northern Norway |
genre_facet |
Arctic Arctic Climate change Northern Norway |
op_relation |
Journal of Geophysical Research (JGR): Earth Surface Norges forskningsråd: 263005 info:eu-repo/grantAgreement/RCN/ROMFORSK/263005/Norway/FrostInSAR: Upscaling the investigation of periglacial landforms in the Norwegian Arctic using Synthetic Aperture Radar Interferometry// info:eu-repo/grantAgreement/RCN/ROMFORSK/212022/Norway/PermaSAR: SAR detection of permafrost landscape changes in northern Norway and on Svalbard// Rouyet, Karjalainen, Niittynen, Aalto, Luoto, Lauknes, Larsen, Hjort. Environmental Controls of InSAR-Based Periglacial Ground Dynamics in a Sub-Arctic Landscape. Journal of Geophysical Research (JGR): Earth Surface. 2021;126(7) FRIDAID 1925282 doi:10.1029/2021JF006175 2169-9003 2169-9011 https://hdl.handle.net/10037/22099 |
op_rights |
openAccess Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1029/2021JF006175 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
126 |
container_issue |
7 |
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1766297602347761664 |