Glacier and ocean variability in Ata Sund, west Greenland, since 1400 CE
International audience To improve knowledge of marine-terminating glaciers in western Greenland, marine sediment cores from the Ata Sund fjord system, hosting two outlet glaciers, Eqip Sermia and Kangilerngata Sermia, were investigated. The main objective was to reconstruct glacial activity and pale...
Published in: | The Holocene |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://doi.org/10.1177/0959683620950431 https://hal.archives-ouvertes.fr/hal-02917820/file/0959683620950431.pdf https://hal.archives-ouvertes.fr/hal-02917820 |
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fttriple:oai:gotriple.eu:10670/1.fpnzb6 2023-05-15T16:01:04+02:00 Glacier and ocean variability in Ata Sund, west Greenland, since 1400 CE Ekblom Johansson, Fanny Wangner, David Andresen, Camilla, Bakke, Jostein Støren, Eivind Nagel Schmidt, Sabine VIELI, ANDREAS Geological Survey of Denmark and Greenland (GEUS) UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) 2020-01-01 https://doi.org/10.1177/0959683620950431 https://hal.archives-ouvertes.fr/hal-02917820/file/0959683620950431.pdf https://hal.archives-ouvertes.fr/hal-02917820 en eng HAL CCSD London: Sage hal-02917820 doi:10.1177/0959683620950431 10670/1.fpnzb6 https://hal.archives-ouvertes.fr/hal-02917820/file/0959683620950431.pdf https://hal.archives-ouvertes.fr/hal-02917820 lic_creative-commons other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0959-6836 EISSN: 1477-0911 The Holocene The Holocene, London: Sage, 2020, pp.095968362095043. ⟨10.1177/0959683620950431⟩ CT scanning Eqip Sermia foraminiferal analysis Greenland ice-rafted debris Kangilerngata Sermia Late Holocene Little Ice Age geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.1177/0959683620950431 2023-01-22T17:56:19Z International audience To improve knowledge of marine-terminating glaciers in western Greenland, marine sediment cores from the Ata Sund fjord system, hosting two outlet glaciers, Eqip Sermia and Kangilerngata Sermia, were investigated. The main objective was to reconstruct glacial activity and paleoceanographic conditions during the past 600 years. Ice-rafted debris (IRD) was quantified by wet-sieving sediment samples and by using a computed tomography scan. Variability in relative bottom water temperatures in the fjord was reconstructed using foraminiferal analysis. On the basis of this, three periods of distinct glacial regimes were identified: Period 1 (1380–1810 CE), which covers the culmination of the Little Ice Age (LIA) and is interpreted as having advanced glaciers with high IRD content. Period 2 (1810–1920 CE), the end of the LIA, which was characterised by a lowering of the glaciers’ calving flux in response to climate cooling. During Period 3 (1920–2014 CE), both glaciers retreated substantially to their present-day extent. The bottom water temperature started to decrease just before Period 2 and remained relatively low until just before the end of Period 3. This is interpreted as a local response to increased glacial meltwater input. Our study was compared with a study in Disko Bay, nearby Jakobshavn Glacier and the result shows that both of these Greenlandic marine-terminating glaciers are responding to large-scale climate change. However, the specific imprint on the glaciers and the different fjord waters in front of them result in contrasting glacial responses and sediment archives in their respective fjords. Article in Journal/Newspaper Disko Bay glacier Greenland greenlandic Jakobshavn Unknown Eqip Sermia ENVELOPE(-50.067,-50.067,69.817,69.817) Greenland Kangilerngata Sermia ENVELOPE(-50.133,-50.133,69.933,69.933) Sund ENVELOPE(13.644,13.644,66.207,66.207) The Holocene 30 12 1681 1693 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
CT scanning Eqip Sermia foraminiferal analysis Greenland ice-rafted debris Kangilerngata Sermia Late Holocene Little Ice Age geo envir |
spellingShingle |
CT scanning Eqip Sermia foraminiferal analysis Greenland ice-rafted debris Kangilerngata Sermia Late Holocene Little Ice Age geo envir Ekblom Johansson, Fanny Wangner, David Andresen, Camilla, Bakke, Jostein Støren, Eivind Nagel Schmidt, Sabine VIELI, ANDREAS Glacier and ocean variability in Ata Sund, west Greenland, since 1400 CE |
topic_facet |
CT scanning Eqip Sermia foraminiferal analysis Greenland ice-rafted debris Kangilerngata Sermia Late Holocene Little Ice Age geo envir |
description |
International audience To improve knowledge of marine-terminating glaciers in western Greenland, marine sediment cores from the Ata Sund fjord system, hosting two outlet glaciers, Eqip Sermia and Kangilerngata Sermia, were investigated. The main objective was to reconstruct glacial activity and paleoceanographic conditions during the past 600 years. Ice-rafted debris (IRD) was quantified by wet-sieving sediment samples and by using a computed tomography scan. Variability in relative bottom water temperatures in the fjord was reconstructed using foraminiferal analysis. On the basis of this, three periods of distinct glacial regimes were identified: Period 1 (1380–1810 CE), which covers the culmination of the Little Ice Age (LIA) and is interpreted as having advanced glaciers with high IRD content. Period 2 (1810–1920 CE), the end of the LIA, which was characterised by a lowering of the glaciers’ calving flux in response to climate cooling. During Period 3 (1920–2014 CE), both glaciers retreated substantially to their present-day extent. The bottom water temperature started to decrease just before Period 2 and remained relatively low until just before the end of Period 3. This is interpreted as a local response to increased glacial meltwater input. Our study was compared with a study in Disko Bay, nearby Jakobshavn Glacier and the result shows that both of these Greenlandic marine-terminating glaciers are responding to large-scale climate change. However, the specific imprint on the glaciers and the different fjord waters in front of them result in contrasting glacial responses and sediment archives in their respective fjords. |
author2 |
Geological Survey of Denmark and Greenland (GEUS) UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Ekblom Johansson, Fanny Wangner, David Andresen, Camilla, Bakke, Jostein Støren, Eivind Nagel Schmidt, Sabine VIELI, ANDREAS |
author_facet |
Ekblom Johansson, Fanny Wangner, David Andresen, Camilla, Bakke, Jostein Støren, Eivind Nagel Schmidt, Sabine VIELI, ANDREAS |
author_sort |
Ekblom Johansson, Fanny |
title |
Glacier and ocean variability in Ata Sund, west Greenland, since 1400 CE |
title_short |
Glacier and ocean variability in Ata Sund, west Greenland, since 1400 CE |
title_full |
Glacier and ocean variability in Ata Sund, west Greenland, since 1400 CE |
title_fullStr |
Glacier and ocean variability in Ata Sund, west Greenland, since 1400 CE |
title_full_unstemmed |
Glacier and ocean variability in Ata Sund, west Greenland, since 1400 CE |
title_sort |
glacier and ocean variability in ata sund, west greenland, since 1400 ce |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://doi.org/10.1177/0959683620950431 https://hal.archives-ouvertes.fr/hal-02917820/file/0959683620950431.pdf https://hal.archives-ouvertes.fr/hal-02917820 |
long_lat |
ENVELOPE(-50.067,-50.067,69.817,69.817) ENVELOPE(-50.133,-50.133,69.933,69.933) ENVELOPE(13.644,13.644,66.207,66.207) |
geographic |
Eqip Sermia Greenland Kangilerngata Sermia Sund |
geographic_facet |
Eqip Sermia Greenland Kangilerngata Sermia Sund |
genre |
Disko Bay glacier Greenland greenlandic Jakobshavn |
genre_facet |
Disko Bay glacier Greenland greenlandic Jakobshavn |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0959-6836 EISSN: 1477-0911 The Holocene The Holocene, London: Sage, 2020, pp.095968362095043. ⟨10.1177/0959683620950431⟩ |
op_relation |
hal-02917820 doi:10.1177/0959683620950431 10670/1.fpnzb6 https://hal.archives-ouvertes.fr/hal-02917820/file/0959683620950431.pdf https://hal.archives-ouvertes.fr/hal-02917820 |
op_rights |
lic_creative-commons other |
op_doi |
https://doi.org/10.1177/0959683620950431 |
container_title |
The Holocene |
container_volume |
30 |
container_issue |
12 |
container_start_page |
1681 |
op_container_end_page |
1693 |
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1766397068958498816 |