An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes
Three decades after the early definition of the "paraglacial" concept, a general model of paraglaciation was established, integrating the typical sediment paraglacial cascading system and the responses of associated sediment storages. The residuals of this model should now be examined and...
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ftopenedition:oai:revues.org:quaternaire/6444 2023-05-15T16:52:10+02:00 An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry 2016-03-01 http://quaternaire.revues.org/6444 en eng Association française pour l’étude du quaternaire Quaternaire urn:doi:10.4000/quaternaire.6444 http://quaternaire.revues.org/6444 info:eu-repo/semantics/openAccess cascading system landsliding mountain slopes northern hemisphere paraglaciation sediment fluxes cascade sédimentaire hémisphère nord montagnes mouvement de terrain versants info:eu-repo/semantics/article article 2016 ftopenedition https://doi.org/10.4000/quaternaire.6444 2017-10-01T00:07:55Z Three decades after the early definition of the "paraglacial" concept, a general model of paraglaciation was established, integrating the typical sediment paraglacial cascading system and the responses of associated sediment storages. The residuals of this model should now be examined and explained through controlling factors that may act at both regional (e.g. tectonics) and local (topography, lithology, etc.) scales. We compare here the patterns identified in a few mountain ranges of the northern hemisphere, located in various seismotectonic settings (especially western Alps, northwestern Scotland, central Norway, Svalbard and Iceland). By combining our field observations with a literature review, the effectiveness of the paraglacial response on mountain-slope erosion and the contribution of paraglaciation to the sedimentary cascading system are discussed. In most cases, paraglaciation generates sediment storage and aggradation in headwaters and glacial trough, as the evacuation rate into sinks remains low. Finally, paraglaciation appears to be a period of hillslope denudation, preparing reservoirs of sediments, which can only be effectively evacuated during further glaciation periods. Trois décennies après la définition initiale du concept de "paraglaciaire", un modèle général de la paraglaciation a été formalisé, intégrant la cascade sédimentaire paraglaciaire et les types de réponses des réservoirs de sédiments associés. Les écarts à ce modèle doivent maintenant être examinés et expliqués par des facteurs de contrôle agissant aussi bien à l’échelle régionale (tectonique, notamment) que locale (topographie, lithologie, etc.). Nous comparons ici des schémas établis dans quelques massifs montagneux de l'hémisphère nord, localisés dans des contextes séismo-tectoniques variés (notamment Alpes occidentales, nord-ouest de l'Ecosse, Norvège centrale, Svalbard et l'Islande). En combinant nos observations de terrain avec une recension bibliographique, nous discutons de l'efficacité de la réponse paraglaciaire sur ... Article in Journal/Newspaper Iceland Svalbard OpenEdition Norway Svalbard Quaternaire vol. 24/1 13 24 |
institution |
Open Polar |
collection |
OpenEdition |
op_collection_id |
ftopenedition |
language |
English |
topic |
cascading system landsliding mountain slopes northern hemisphere paraglaciation sediment fluxes cascade sédimentaire hémisphère nord montagnes mouvement de terrain versants |
spellingShingle |
cascading system landsliding mountain slopes northern hemisphere paraglaciation sediment fluxes cascade sédimentaire hémisphère nord montagnes mouvement de terrain versants Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
topic_facet |
cascading system landsliding mountain slopes northern hemisphere paraglaciation sediment fluxes cascade sédimentaire hémisphère nord montagnes mouvement de terrain versants |
description |
Three decades after the early definition of the "paraglacial" concept, a general model of paraglaciation was established, integrating the typical sediment paraglacial cascading system and the responses of associated sediment storages. The residuals of this model should now be examined and explained through controlling factors that may act at both regional (e.g. tectonics) and local (topography, lithology, etc.) scales. We compare here the patterns identified in a few mountain ranges of the northern hemisphere, located in various seismotectonic settings (especially western Alps, northwestern Scotland, central Norway, Svalbard and Iceland). By combining our field observations with a literature review, the effectiveness of the paraglacial response on mountain-slope erosion and the contribution of paraglaciation to the sedimentary cascading system are discussed. In most cases, paraglaciation generates sediment storage and aggradation in headwaters and glacial trough, as the evacuation rate into sinks remains low. Finally, paraglaciation appears to be a period of hillslope denudation, preparing reservoirs of sediments, which can only be effectively evacuated during further glaciation periods. Trois décennies après la définition initiale du concept de "paraglaciaire", un modèle général de la paraglaciation a été formalisé, intégrant la cascade sédimentaire paraglaciaire et les types de réponses des réservoirs de sédiments associés. Les écarts à ce modèle doivent maintenant être examinés et expliqués par des facteurs de contrôle agissant aussi bien à l’échelle régionale (tectonique, notamment) que locale (topographie, lithologie, etc.). Nous comparons ici des schémas établis dans quelques massifs montagneux de l'hémisphère nord, localisés dans des contextes séismo-tectoniques variés (notamment Alpes occidentales, nord-ouest de l'Ecosse, Norvège centrale, Svalbard et l'Islande). En combinant nos observations de terrain avec une recension bibliographique, nous discutons de l'efficacité de la réponse paraglaciaire sur ... |
format |
Article in Journal/Newspaper |
author |
Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry |
author_facet |
Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry |
author_sort |
Cossart, Etienne |
title |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_short |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_full |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_fullStr |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_full_unstemmed |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_sort |
overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
publisher |
Association française pour l’étude du quaternaire |
publishDate |
2016 |
url |
http://quaternaire.revues.org/6444 |
geographic |
Norway Svalbard |
geographic_facet |
Norway Svalbard |
genre |
Iceland Svalbard |
genre_facet |
Iceland Svalbard |
op_relation |
urn:doi:10.4000/quaternaire.6444 http://quaternaire.revues.org/6444 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.4000/quaternaire.6444 |
container_title |
Quaternaire |
container_issue |
vol. 24/1 |
container_start_page |
13 |
op_container_end_page |
24 |
_version_ |
1766042314249076736 |