Climate change and erosion: view from northern Scandinavia.
International audience The impact of Quaternary glaciations is evidenced worldwide in mountains and may have induced an increase of erosion rates (accelerated erosion). Low-temperature thermochronometry has been extensively used to unravel the complex links between climate and erosion. However, unti...
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Format: | Conference Object |
Language: | English |
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HAL CCSD
2018
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Online Access: | https://hal.archives-ouvertes.fr/hal-02930746 |
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ftccsdartic:oai:HAL:hal-02930746v1 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Lenard, S.J.P. Gautheron, Cécile Valla, Pierre Bingen, Bernard Van Der Beek, Peter Loget, Nicolas Schwartz, Stéphane Pinna Jamme, Rosella Lenard¹⁺², Sebastien, Gautheron¹, Cécile Valla³⁺⁴, Pierre, Bingen⁵, Bernard Van Der Beek⁴, Peter Loget⁶, Nicolas Schwartz⁴, Stéphane Pinna-Jamme¹, Rosella Climate change and erosion: view from northern Scandinavia. |
topic_facet |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience The impact of Quaternary glaciations is evidenced worldwide in mountains and may have induced an increase of erosion rates (accelerated erosion). Low-temperature thermochronometry has been extensively used to unravel the complex links between climate and erosion. However, until now, only a limited number of studies detected accelerated erosion that can be interpreted as independent of tectonics and associated with climate change. In these conditions, will low-temperature yield any further advance in our understanding of the interactions between climate change and erosion? Here we discuss about a recent new and high-resolution apatite (U-Th-Sm)/He (AHe) dataset from northern Scandinavia, along the Norwegian Sea continental margin spanning from the Lofoten archipelago to the Tromsø area (68 to 70°N). The region presents dramatic alpine relief. The long-term evolution of the Norwegian margin results from the Caledonian orogeny followed by the Mesozoic rifting and offshore volcanism associated with the North-Atlantic oceanic breakup at c. 50-56 Ma. Bedrock samples were collected at sea-level and additional high-elevation samples were also collected to form elevation-profiles. The results were associated with available apatite fission-track data into inverse thermal modelling using QTQt. The dataset gives an unexpected insight on the extent and character of late Cenozoic erosion in North Scandinavia and the polar regions. A consistent set of AHe ages are younger than any published AFT or AHe ages at surface in Scandinavia (i.e. < 72 Ma). After a long period of tectonic exhumation derived from the Mesozoic rifting, the region underwent a long period with little erosion. Then, the dataset recorded a previously undetected phase of accelerated erosion since the Middle Miocene onwards. The results are interpreted as a consequence of efficient glacial processes, in the context of a gradual cooling of the North Atlantic, and point to Pre-Quaternary ice caps in northern Scandinavia, with a gradual ... |
author2 |
Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Géosciences Paris Saclay (GEOPS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Institut für Geologie Bern Universität Bern Bern Geological Survey of Norway (NGU) Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) Institut des Sciences de la Terre de Paris (iSTeP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Lenard, S.J.P. Gautheron, Cécile Valla, Pierre Bingen, Bernard Van Der Beek, Peter Loget, Nicolas Schwartz, Stéphane Pinna Jamme, Rosella Lenard¹⁺², Sebastien, Gautheron¹, Cécile Valla³⁺⁴, Pierre, Bingen⁵, Bernard Van Der Beek⁴, Peter Loget⁶, Nicolas Schwartz⁴, Stéphane Pinna-Jamme¹, Rosella |
author_facet |
Lenard, S.J.P. Gautheron, Cécile Valla, Pierre Bingen, Bernard Van Der Beek, Peter Loget, Nicolas Schwartz, Stéphane Pinna Jamme, Rosella Lenard¹⁺², Sebastien, Gautheron¹, Cécile Valla³⁺⁴, Pierre, Bingen⁵, Bernard Van Der Beek⁴, Peter Loget⁶, Nicolas Schwartz⁴, Stéphane Pinna-Jamme¹, Rosella |
author_sort |
Lenard, S.J.P. |
title |
Climate change and erosion: view from northern Scandinavia. |
title_short |
Climate change and erosion: view from northern Scandinavia. |
title_full |
Climate change and erosion: view from northern Scandinavia. |
title_fullStr |
Climate change and erosion: view from northern Scandinavia. |
title_full_unstemmed |
Climate change and erosion: view from northern Scandinavia. |
title_sort |
climate change and erosion: view from northern scandinavia. |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.archives-ouvertes.fr/hal-02930746 |
op_coverage |
Quedlinburg, Germany |
geographic |
Lofoten Norwegian Sea Tromsø |
geographic_facet |
Lofoten Norwegian Sea Tromsø |
genre |
Lofoten North Atlantic Norwegian Sea Tromsø |
genre_facet |
Lofoten North Atlantic Norwegian Sea Tromsø |
op_source |
Thermo, International Conference on Thermochronology https://hal.archives-ouvertes.fr/hal-02930746 Thermo, International Conference on Thermochronology, Sep 2018, Quedlinburg, Germany |
op_relation |
hal-02930746 https://hal.archives-ouvertes.fr/hal-02930746 |
_version_ |
1766064063081611264 |
spelling |
ftccsdartic:oai:HAL:hal-02930746v1 2023-05-15T17:08:20+02:00 Climate change and erosion: view from northern Scandinavia. Lenard, S.J.P. Gautheron, Cécile Valla, Pierre Bingen, Bernard Van Der Beek, Peter Loget, Nicolas Schwartz, Stéphane Pinna Jamme, Rosella Lenard¹⁺², Sebastien, Gautheron¹, Cécile Valla³⁺⁴, Pierre, Bingen⁵, Bernard Van Der Beek⁴, Peter Loget⁶, Nicolas Schwartz⁴, Stéphane Pinna-Jamme¹, Rosella Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Géosciences Paris Saclay (GEOPS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Institut für Geologie Bern Universität Bern Bern Geological Survey of Norway (NGU) Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) Institut des Sciences de la Terre de Paris (iSTeP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Quedlinburg, Germany 2018-09 https://hal.archives-ouvertes.fr/hal-02930746 en eng HAL CCSD hal-02930746 https://hal.archives-ouvertes.fr/hal-02930746 Thermo, International Conference on Thermochronology https://hal.archives-ouvertes.fr/hal-02930746 Thermo, International Conference on Thermochronology, Sep 2018, Quedlinburg, Germany [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/conferenceObject Conference papers 2018 ftccsdartic 2021-12-19T00:57:15Z International audience The impact of Quaternary glaciations is evidenced worldwide in mountains and may have induced an increase of erosion rates (accelerated erosion). Low-temperature thermochronometry has been extensively used to unravel the complex links between climate and erosion. However, until now, only a limited number of studies detected accelerated erosion that can be interpreted as independent of tectonics and associated with climate change. In these conditions, will low-temperature yield any further advance in our understanding of the interactions between climate change and erosion? Here we discuss about a recent new and high-resolution apatite (U-Th-Sm)/He (AHe) dataset from northern Scandinavia, along the Norwegian Sea continental margin spanning from the Lofoten archipelago to the Tromsø area (68 to 70°N). The region presents dramatic alpine relief. The long-term evolution of the Norwegian margin results from the Caledonian orogeny followed by the Mesozoic rifting and offshore volcanism associated with the North-Atlantic oceanic breakup at c. 50-56 Ma. Bedrock samples were collected at sea-level and additional high-elevation samples were also collected to form elevation-profiles. The results were associated with available apatite fission-track data into inverse thermal modelling using QTQt. The dataset gives an unexpected insight on the extent and character of late Cenozoic erosion in North Scandinavia and the polar regions. A consistent set of AHe ages are younger than any published AFT or AHe ages at surface in Scandinavia (i.e. < 72 Ma). After a long period of tectonic exhumation derived from the Mesozoic rifting, the region underwent a long period with little erosion. Then, the dataset recorded a previously undetected phase of accelerated erosion since the Middle Miocene onwards. The results are interpreted as a consequence of efficient glacial processes, in the context of a gradual cooling of the North Atlantic, and point to Pre-Quaternary ice caps in northern Scandinavia, with a gradual ... Conference Object Lofoten North Atlantic Norwegian Sea Tromsø Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Lofoten Norwegian Sea Tromsø |