Unstable ice stream in Greenland during the Younger Dryas cold event
International audience Past, present, and future ice sheet stability is closely linked to the dynamic behavior of major draining ice streams and surrounding ice shelves. While short observational records document the recent variability and acceleration of ice streams, the long-term dynamics of ice s...
Published in: | Geology |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2014
|
Subjects: | |
Online Access: | https://hal.science/hal-02905271 https://doi.org/10.1130/G35929.1 |
id |
ftceafr:oai:HAL:hal-02905271v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes [SDU]Sciences of the Universe [physics] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes [SDU]Sciences of the Universe [physics] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Rinterknecht, Vincent Jomelli, Vincent Brunstein, Daniel Favier, Vincent Masson-Delmotte, Valérie Bourlès, Didier Léanni, Laettitia Schläppy, Romain Unstable ice stream in Greenland during the Younger Dryas cold event |
topic_facet |
[SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes [SDU]Sciences of the Universe [physics] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Past, present, and future ice sheet stability is closely linked to the dynamic behavior of major draining ice streams and surrounding ice shelves. While short observational records document the recent variability and acceleration of ice streams, the long-term dynamics of ice streams remain poorly documented. Here, we date the Pjetursson’s Moraine on Disko Island, Greenland, to 12.2 ± 0.6 ka and demonstrate that the Jakobshavn Isbræ (JI) ice stream collapsed during the middle of the Younger Dryas (YD) cold interval. We suggest that this collapse was due to the incursion of warm subsurface water under the ice shelf fronting the JI ice stream, as well as increased surface-air temperature and sea-surface temperature seasonality starting at the beginning of the YD cold interval. The triggered acceleration of the land-based JI and the delivery of icebergs into Disko Bugt potentially contributed to Heinrich Event 0 at the end of the YD. The collapse of the JI ice stream 12.2 ± 0.6 ka ago demonstrates that calving marine-based ice margins can respond rapidly to environmental changes. It provides a new benchmark for marine-terminating ice stream models. |
author2 |
DEES University of St Andrews Scotland Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 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) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) 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)) |
format |
Article in Journal/Newspaper |
author |
Rinterknecht, Vincent Jomelli, Vincent Brunstein, Daniel Favier, Vincent Masson-Delmotte, Valérie Bourlès, Didier Léanni, Laettitia Schläppy, Romain |
author_facet |
Rinterknecht, Vincent Jomelli, Vincent Brunstein, Daniel Favier, Vincent Masson-Delmotte, Valérie Bourlès, Didier Léanni, Laettitia Schläppy, Romain |
author_sort |
Rinterknecht, Vincent |
title |
Unstable ice stream in Greenland during the Younger Dryas cold event |
title_short |
Unstable ice stream in Greenland during the Younger Dryas cold event |
title_full |
Unstable ice stream in Greenland during the Younger Dryas cold event |
title_fullStr |
Unstable ice stream in Greenland during the Younger Dryas cold event |
title_full_unstemmed |
Unstable ice stream in Greenland during the Younger Dryas cold event |
title_sort |
unstable ice stream in greenland during the younger dryas cold event |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-02905271 https://doi.org/10.1130/G35929.1 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Greenland Jakobshavn Isbræ |
geographic_facet |
Greenland Jakobshavn Isbræ |
genre |
Disko bugt Greenland Ice Sheet Ice Shelf Ice Shelves Jakobshavn Jakobshavn isbræ |
genre_facet |
Disko bugt Greenland Ice Sheet Ice Shelf Ice Shelves Jakobshavn Jakobshavn isbræ |
op_source |
ISSN: 0091-7613 EISSN: 1943-2682 Geology https://hal.science/hal-02905271 Geology, 2014, 42 (9), pp.759-762. ⟨10.1130/G35929.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1130/G35929.1 hal-02905271 https://hal.science/hal-02905271 doi:10.1130/G35929.1 |
op_doi |
https://doi.org/10.1130/G35929.1 |
container_title |
Geology |
container_volume |
42 |
container_issue |
9 |
container_start_page |
759 |
op_container_end_page |
762 |
_version_ |
1801375027563593728 |
spelling |
ftceafr:oai:HAL:hal-02905271v1 2024-06-09T07:45:35+00:00 Unstable ice stream in Greenland during the Younger Dryas cold event Rinterknecht, Vincent Jomelli, Vincent Brunstein, Daniel Favier, Vincent Masson-Delmotte, Valérie Bourlès, Didier Léanni, Laettitia Schläppy, Romain DEES University of St Andrews Scotland Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 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) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) 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)) 2014 https://hal.science/hal-02905271 https://doi.org/10.1130/G35929.1 en eng HAL CCSD Geological Society of America info:eu-repo/semantics/altIdentifier/doi/10.1130/G35929.1 hal-02905271 https://hal.science/hal-02905271 doi:10.1130/G35929.1 ISSN: 0091-7613 EISSN: 1943-2682 Geology https://hal.science/hal-02905271 Geology, 2014, 42 (9), pp.759-762. ⟨10.1130/G35929.1⟩ [SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes [SDU]Sciences of the Universe [physics] [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 2014 ftceafr https://doi.org/10.1130/G35929.1 2024-05-16T14:55:00Z International audience Past, present, and future ice sheet stability is closely linked to the dynamic behavior of major draining ice streams and surrounding ice shelves. While short observational records document the recent variability and acceleration of ice streams, the long-term dynamics of ice streams remain poorly documented. Here, we date the Pjetursson’s Moraine on Disko Island, Greenland, to 12.2 ± 0.6 ka and demonstrate that the Jakobshavn Isbræ (JI) ice stream collapsed during the middle of the Younger Dryas (YD) cold interval. We suggest that this collapse was due to the incursion of warm subsurface water under the ice shelf fronting the JI ice stream, as well as increased surface-air temperature and sea-surface temperature seasonality starting at the beginning of the YD cold interval. The triggered acceleration of the land-based JI and the delivery of icebergs into Disko Bugt potentially contributed to Heinrich Event 0 at the end of the YD. The collapse of the JI ice stream 12.2 ± 0.6 ka ago demonstrates that calving marine-based ice margins can respond rapidly to environmental changes. It provides a new benchmark for marine-terminating ice stream models. Article in Journal/Newspaper Disko bugt Greenland Ice Sheet Ice Shelf Ice Shelves Jakobshavn Jakobshavn isbræ HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) Geology 42 9 759 762 |