Impacts of post-glacial rebound on landslide spatial distribution at a regional scale in northern Iceland (Skagafjörður)
International audience In de-glaciated areas, para-glaciation (i.e. the conditioning of landscapes by prior glaciation) has often been considered a major predisposing factor in landslide occurrence; its consequences have been particularly well identified at a fine scale (especially on bedrock jointi...
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ftnormandieuniv:oai:HAL:hal-00859798v1 2024-05-19T07:42:37+00:00 Impacts of post-glacial rebound on landslide spatial distribution at a regional scale in northern Iceland (Skagafjörður) Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry Jónsson, Helgi Páll Sæmundsson, Þorsteinn Pôle de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG) Université Paris 1 Panthéon-Sorbonne (UP1)-Institut de Recherche pour le Développement (IRD)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris-Sorbonne (UP4)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) Littoral, Environnement, Télédétection, Géomatique (LETG - Nantes) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN) Université de Nantes (UN)-Université de Nantes (UN) Náttúrustofa Norðurlands vestra (NNv) Ríkisins, Sveitafélag Skagafjarðar 2013-07-25 https://hal.science/hal-00859798 https://doi.org/10.1002/esp.3450 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1002/esp.3450 hal-00859798 https://hal.science/hal-00859798 doi:10.1002/esp.3450 ISSN: 0197-9337 EISSN: 1096-9837 Earth Surface Processes and Landforms https://hal.science/hal-00859798 Earth Surface Processes and Landforms, 2013, 39 (3), p. 336-350. ⟨10.1002/esp.3450⟩ Iceland spatial analysis para-glacial hillslope processes post-glacial rebound mass movements [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SHS.GEO]Humanities and Social Sciences/Geography info:eu-repo/semantics/article Journal articles 2013 ftnormandieuniv https://doi.org/10.1002/esp.3450 2024-04-24T23:54:45Z International audience In de-glaciated areas, para-glaciation (i.e. the conditioning of landscapes by prior glaciation) has often been considered a major predisposing factor in landslide occurrence; its consequences have been particularly well identified at a fine scale (especially on bedrock jointing). Hitherto, the relative impacts of para-glaciation on hillslope dynamics at a regional scale had nevertheless not been quantified statistically. We examine Skagafjörður area (northern Iceland) where landslides are widespread (at least 108 were mapped in an area of c. 3000km2).We compare the role of para-glaciation (debuttressing, influence of post-glacial rebound) with that of classic factors (topography, lithology, etc.) in landslide occurrence and location, using a spatial analysis based on a chi-square test. On the one hand, the results highlight that landslides are over-represented in areas where post-glacial rebound was at its maximum, with a stronger concentration of landslides in the northern part of the fjord. On the other hand, the distribution of landslides did not show any clear relationship with the pattern of glacial debuttressing. Tschuprow coefficient highlights that the influence of post-glacial rebound on landslide location is higher than the combined influence of slope gradient, curvature or geological structure. This result is supported by our initial evidence for the timing of landslides in the area: most landslides occurred during the first half of the Holocene, and a period of hillslope instability was initiated when the post-glacial uplift was at its maximum. Finally, the mechanisms that link post-glacial rebound and landsliding as well as the geomorphic impacts of landslides, are discussed. Article in Journal/Newspaper Iceland Normandie Université: HAL Earth Surface Processes and Landforms 39 3 336 350 |
institution |
Open Polar |
collection |
Normandie Université: HAL |
op_collection_id |
ftnormandieuniv |
language |
English |
topic |
Iceland spatial analysis para-glacial hillslope processes post-glacial rebound mass movements [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SHS.GEO]Humanities and Social Sciences/Geography |
spellingShingle |
Iceland spatial analysis para-glacial hillslope processes post-glacial rebound mass movements [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SHS.GEO]Humanities and Social Sciences/Geography Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry Jónsson, Helgi Páll Sæmundsson, Þorsteinn Impacts of post-glacial rebound on landslide spatial distribution at a regional scale in northern Iceland (Skagafjörður) |
topic_facet |
Iceland spatial analysis para-glacial hillslope processes post-glacial rebound mass movements [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SHS.GEO]Humanities and Social Sciences/Geography |
description |
International audience In de-glaciated areas, para-glaciation (i.e. the conditioning of landscapes by prior glaciation) has often been considered a major predisposing factor in landslide occurrence; its consequences have been particularly well identified at a fine scale (especially on bedrock jointing). Hitherto, the relative impacts of para-glaciation on hillslope dynamics at a regional scale had nevertheless not been quantified statistically. We examine Skagafjörður area (northern Iceland) where landslides are widespread (at least 108 were mapped in an area of c. 3000km2).We compare the role of para-glaciation (debuttressing, influence of post-glacial rebound) with that of classic factors (topography, lithology, etc.) in landslide occurrence and location, using a spatial analysis based on a chi-square test. On the one hand, the results highlight that landslides are over-represented in areas where post-glacial rebound was at its maximum, with a stronger concentration of landslides in the northern part of the fjord. On the other hand, the distribution of landslides did not show any clear relationship with the pattern of glacial debuttressing. Tschuprow coefficient highlights that the influence of post-glacial rebound on landslide location is higher than the combined influence of slope gradient, curvature or geological structure. This result is supported by our initial evidence for the timing of landslides in the area: most landslides occurred during the first half of the Holocene, and a period of hillslope instability was initiated when the post-glacial uplift was at its maximum. Finally, the mechanisms that link post-glacial rebound and landsliding as well as the geomorphic impacts of landslides, are discussed. |
author2 |
Pôle de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG) Université Paris 1 Panthéon-Sorbonne (UP1)-Institut de Recherche pour le Développement (IRD)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris-Sorbonne (UP4)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) Littoral, Environnement, Télédétection, Géomatique (LETG - Nantes) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN) Université de Nantes (UN)-Université de Nantes (UN) Náttúrustofa Norðurlands vestra (NNv) Ríkisins, Sveitafélag Skagafjarðar |
format |
Article in Journal/Newspaper |
author |
Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry Jónsson, Helgi Páll Sæmundsson, Þorsteinn |
author_facet |
Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry Jónsson, Helgi Páll Sæmundsson, Þorsteinn |
author_sort |
Cossart, Etienne |
title |
Impacts of post-glacial rebound on landslide spatial distribution at a regional scale in northern Iceland (Skagafjörður) |
title_short |
Impacts of post-glacial rebound on landslide spatial distribution at a regional scale in northern Iceland (Skagafjörður) |
title_full |
Impacts of post-glacial rebound on landslide spatial distribution at a regional scale in northern Iceland (Skagafjörður) |
title_fullStr |
Impacts of post-glacial rebound on landslide spatial distribution at a regional scale in northern Iceland (Skagafjörður) |
title_full_unstemmed |
Impacts of post-glacial rebound on landslide spatial distribution at a regional scale in northern Iceland (Skagafjörður) |
title_sort |
impacts of post-glacial rebound on landslide spatial distribution at a regional scale in northern iceland (skagafjörður) |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-00859798 https://doi.org/10.1002/esp.3450 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 0197-9337 EISSN: 1096-9837 Earth Surface Processes and Landforms https://hal.science/hal-00859798 Earth Surface Processes and Landforms, 2013, 39 (3), p. 336-350. ⟨10.1002/esp.3450⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/esp.3450 hal-00859798 https://hal.science/hal-00859798 doi:10.1002/esp.3450 |
op_doi |
https://doi.org/10.1002/esp.3450 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
39 |
container_issue |
3 |
container_start_page |
336 |
op_container_end_page |
350 |
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1799482320618520576 |