Volcanoes and climate: the triggering of preboreal Jökulhlaups in Iceland
International audience The Early Holocene (12-8.2 cal ka) deglaciation and pulsed warming was associated in Iceland with two major generations of jökulhlaups around the Vatna ice-cap (Vatnajökull), at ca 11.4-11.2 cal ka and ca 10.4-9.9 cal ka, and major tephra emissions from the Grímsvötn and Bárða...
Published in: | International Journal of Earth Sciences |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.science/hal-02938576 https://hal.science/hal-02938576/document https://hal.science/hal-02938576/file/74845.pdf https://doi.org/10.1007/s00531-020-01833-9 |
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ftinsu:oai:HAL:hal-02938576v1 |
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openpolar |
institution |
Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Holocene Deglaciation Iceland Geomorphology Glacial Flood Sedimentology Tephra Glacio-isostatic rebound Permafrost Saksunarvatn event Askja S [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
Holocene Deglaciation Iceland Geomorphology Glacial Flood Sedimentology Tephra Glacio-isostatic rebound Permafrost Saksunarvatn event Askja S [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment van Vliet-Lanoë, Brigitte Knudsen, Oskar Guðmundsson, Agust Guillou, Hervé Chazot, Gilles Langlade, Jessica Liorzou, Céline Nonnotte, Philippe Volcanoes and climate: the triggering of preboreal Jökulhlaups in Iceland |
topic_facet |
Holocene Deglaciation Iceland Geomorphology Glacial Flood Sedimentology Tephra Glacio-isostatic rebound Permafrost Saksunarvatn event Askja S [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The Early Holocene (12-8.2 cal ka) deglaciation and pulsed warming was associated in Iceland with two major generations of jökulhlaups around the Vatna ice-cap (Vatnajökull), at ca 11.4-11.2 cal ka and ca 10.4-9.9 cal ka, and major tephra emissions from the Grímsvötn and Bárðarbunga subglacial volcanoes. The earliest flood events were recorded inland during the Middle Younger Dryas and their deposits were overlain by the Early Preboreal Vedde Ash (11.8 cal ka). The first Holocene flood events (ca 11.4-11.2 cal ka) are issued from a glacial advance. The second, and major, set of floods was partly driven by the Erdalen cold events and advances (10.1-9.7 10Be ka) initially issued from the Bárðarbunga (10.4, 10.1-9.9 ka) and Grímsvötn volcanoes (Saksunarvatn tephra complex, ca. 10.2-9.9 cal ka). These floods were also fed by the residual glacio-isostatic depressions below the Vatnajökull that enabled the storage of meltwaters in large subglacial lakes or aquifers until ca. 9.3 cal ka. This storage was enhanced by icedamming and permafrost, especially during the twinned Erdalen events. Due to the glacio-isostatic rebound, the general slope was nearly flat, and the valley was partly filled with sediments until ca 10.8 cal ka. Temporary lacustrine deposits in this valley resulted from the very broad splay of waters as for the ca 11.2 cal ka and ca 10.1-9.9 cal ka flood, due to regional permafrost. These floods had a potential duration of several months as they were mostly fed by climate-driven meltwater. The maximal volume evacuated by these events did not greatly exceed 1 × 106 m3 s−1 from the flood-affected transverse profile of the valleys that remain partly filled with sediments. |
author2 |
Laboratoire Géosciences Océan (LGO) Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Reykjavík University Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
format |
Article in Journal/Newspaper |
author |
van Vliet-Lanoë, Brigitte Knudsen, Oskar Guðmundsson, Agust Guillou, Hervé Chazot, Gilles Langlade, Jessica Liorzou, Céline Nonnotte, Philippe |
author_facet |
van Vliet-Lanoë, Brigitte Knudsen, Oskar Guðmundsson, Agust Guillou, Hervé Chazot, Gilles Langlade, Jessica Liorzou, Céline Nonnotte, Philippe |
author_sort |
van Vliet-Lanoë, Brigitte |
title |
Volcanoes and climate: the triggering of preboreal Jökulhlaups in Iceland |
title_short |
Volcanoes and climate: the triggering of preboreal Jökulhlaups in Iceland |
title_full |
Volcanoes and climate: the triggering of preboreal Jökulhlaups in Iceland |
title_fullStr |
Volcanoes and climate: the triggering of preboreal Jökulhlaups in Iceland |
title_full_unstemmed |
Volcanoes and climate: the triggering of preboreal Jökulhlaups in Iceland |
title_sort |
volcanoes and climate: the triggering of preboreal jökulhlaups in iceland |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02938576 https://hal.science/hal-02938576/document https://hal.science/hal-02938576/file/74845.pdf https://doi.org/10.1007/s00531-020-01833-9 |
genre |
Ice Ice cap Iceland permafrost Vatnajökull |
genre_facet |
Ice Ice cap Iceland permafrost Vatnajökull |
op_source |
ISSN: 1437-3254 EISSN: 1437-3262 International Journal of Earth Sciences https://hal.science/hal-02938576 International Journal of Earth Sciences, 2020, 109 (3), pp.847-876. ⟨10.1007/s00531-020-01833-9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00531-020-01833-9 hal-02938576 https://hal.science/hal-02938576 https://hal.science/hal-02938576/document https://hal.science/hal-02938576/file/74845.pdf doi:10.1007/s00531-020-01833-9 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s00531-020-01833-9 |
container_title |
International Journal of Earth Sciences |
container_volume |
109 |
container_issue |
3 |
container_start_page |
847 |
op_container_end_page |
876 |
_version_ |
1797584487944552448 |
spelling |
ftinsu:oai:HAL:hal-02938576v1 2024-04-28T08:23:48+00:00 Volcanoes and climate: the triggering of preboreal Jökulhlaups in Iceland van Vliet-Lanoë, Brigitte Knudsen, Oskar Guðmundsson, Agust Guillou, Hervé Chazot, Gilles Langlade, Jessica Liorzou, Céline Nonnotte, Philippe Laboratoire Géosciences Océan (LGO) Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Reykjavík University Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) 2020-04 https://hal.science/hal-02938576 https://hal.science/hal-02938576/document https://hal.science/hal-02938576/file/74845.pdf https://doi.org/10.1007/s00531-020-01833-9 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00531-020-01833-9 hal-02938576 https://hal.science/hal-02938576 https://hal.science/hal-02938576/document https://hal.science/hal-02938576/file/74845.pdf doi:10.1007/s00531-020-01833-9 info:eu-repo/semantics/OpenAccess ISSN: 1437-3254 EISSN: 1437-3262 International Journal of Earth Sciences https://hal.science/hal-02938576 International Journal of Earth Sciences, 2020, 109 (3), pp.847-876. ⟨10.1007/s00531-020-01833-9⟩ Holocene Deglaciation Iceland Geomorphology Glacial Flood Sedimentology Tephra Glacio-isostatic rebound Permafrost Saksunarvatn event Askja S [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2020 ftinsu https://doi.org/10.1007/s00531-020-01833-9 2024-04-05T00:37:31Z International audience The Early Holocene (12-8.2 cal ka) deglaciation and pulsed warming was associated in Iceland with two major generations of jökulhlaups around the Vatna ice-cap (Vatnajökull), at ca 11.4-11.2 cal ka and ca 10.4-9.9 cal ka, and major tephra emissions from the Grímsvötn and Bárðarbunga subglacial volcanoes. The earliest flood events were recorded inland during the Middle Younger Dryas and their deposits were overlain by the Early Preboreal Vedde Ash (11.8 cal ka). The first Holocene flood events (ca 11.4-11.2 cal ka) are issued from a glacial advance. The second, and major, set of floods was partly driven by the Erdalen cold events and advances (10.1-9.7 10Be ka) initially issued from the Bárðarbunga (10.4, 10.1-9.9 ka) and Grímsvötn volcanoes (Saksunarvatn tephra complex, ca. 10.2-9.9 cal ka). These floods were also fed by the residual glacio-isostatic depressions below the Vatnajökull that enabled the storage of meltwaters in large subglacial lakes or aquifers until ca. 9.3 cal ka. This storage was enhanced by icedamming and permafrost, especially during the twinned Erdalen events. Due to the glacio-isostatic rebound, the general slope was nearly flat, and the valley was partly filled with sediments until ca 10.8 cal ka. Temporary lacustrine deposits in this valley resulted from the very broad splay of waters as for the ca 11.2 cal ka and ca 10.1-9.9 cal ka flood, due to regional permafrost. These floods had a potential duration of several months as they were mostly fed by climate-driven meltwater. The maximal volume evacuated by these events did not greatly exceed 1 × 106 m3 s−1 from the flood-affected transverse profile of the valleys that remain partly filled with sediments. Article in Journal/Newspaper Ice Ice cap Iceland permafrost Vatnajökull Institut national des sciences de l'Univers: HAL-INSU International Journal of Earth Sciences 109 3 847 876 |