Internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the Holocene? A model study
International audience The climate of the Holocene, the current interglacial covering the past 11,700 years, has been relatively stable compared to previous periods. Nevertheless, repeating occurrence of rapid natural climate changes that challenged human society are seen in proxy reconstructions. O...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2016
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Online Access: | https://hal.archives-ouvertes.fr/hal-01587575 https://hal.archives-ouvertes.fr/hal-01587575/document https://hal.archives-ouvertes.fr/hal-01587575/file/fic6_1.pdf https://doi.org/10.1016/j.quascirev.2016.01.026 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
topic |
Climate modeling Icebergs Bond events Holocene Greenland ice sheet [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
Climate modeling Icebergs Bond events Holocene Greenland ice sheet [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Bügelmayer-Blaschek, Marianne Roche, Didier M. Renssen, Hans Andrews, John T. Internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the Holocene? A model study |
topic_facet |
Climate modeling Icebergs Bond events Holocene Greenland ice sheet [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience The climate of the Holocene, the current interglacial covering the past 11,700 years, has been relatively stable compared to previous periods. Nevertheless, repeating occurrence of rapid natural climate changes that challenged human society are seen in proxy reconstructions. Ocean sediment cores for example display prominent peaks of enhanced ice rafted debris (IRD) during the Holocene with a multi-decadal to millennial scale periodicity. Different mechanisms were proposed that caused these enhanced IRD events, for example variations in the incoming total solar irradiance (TSI), volcanic eruptions and the combination of internal climate variability and external forcings. We investigate the probable mechanisms causing the occurrence of IRD-events over the past 6000 years using a fully coupled climate - ice-sheet - iceberg model (iLOVECLIM). We performed 19 experiments that differ in the applied forcings (TSI, volcanic) and the initial atmospheric conditions. To explore internal ice sheet variability one further experiment was done with fixed climate conditions. All the model runs displayed prominent peaks of enhanced iceberg melt flux (IMF), independent of the chosen experimental set-up. The spectral analysis of the experiments with the ice-sheet - climate model coupled displays significant peaks at 2000, 1000 years in all the experiments and at 500 years in most runs. The experiment with fixed climate conditions displays one significant peak of about 1500 years related to internal ice sheet variability. This frequency is modulated to 2000 and 1000 years in all the experiments with a coupled climate - ice sheet due to interactions between the climate components. We further investigate the impact of minimum TSI events on the timing and occurrence of enhanced IMF. In the experimental set-up that was forced with idealized sinusoidal TSI variations (±4 Wm−2), we find a significant occurrence of an increased iceberg melt flux about 60 years after the minimum TSI value. Yet, we also see a ... |
author2 |
Vrije Universiteit Amsterdam Amsterdam (VU) Modélisation du climat (CLIM) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) University of Colorado Boulder |
format |
Article in Journal/Newspaper |
author |
Bügelmayer-Blaschek, Marianne Roche, Didier M. Renssen, Hans Andrews, John T. |
author_facet |
Bügelmayer-Blaschek, Marianne Roche, Didier M. Renssen, Hans Andrews, John T. |
author_sort |
Bügelmayer-Blaschek, Marianne |
title |
Internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the Holocene? A model study |
title_short |
Internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the Holocene? A model study |
title_full |
Internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the Holocene? A model study |
title_fullStr |
Internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the Holocene? A model study |
title_full_unstemmed |
Internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the Holocene? A model study |
title_sort |
internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the holocene? a model study |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-01587575 https://hal.archives-ouvertes.fr/hal-01587575/document https://hal.archives-ouvertes.fr/hal-01587575/file/fic6_1.pdf https://doi.org/10.1016/j.quascirev.2016.01.026 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://hal.archives-ouvertes.fr/hal-01587575 Quaternary Science Reviews, Elsevier, 2016, 138, pp.119 - 130. ⟨10.1016/j.quascirev.2016.01.026⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2016.01.026 hal-01587575 https://hal.archives-ouvertes.fr/hal-01587575 https://hal.archives-ouvertes.fr/hal-01587575/document https://hal.archives-ouvertes.fr/hal-01587575/file/fic6_1.pdf doi:10.1016/j.quascirev.2016.01.026 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2016.01.026 |
container_title |
Quaternary Science Reviews |
container_volume |
138 |
container_start_page |
119 |
op_container_end_page |
130 |
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1766020244185284608 |
spelling |
ftccsdartic:oai:HAL:hal-01587575v1 2023-05-15T16:30:31+02:00 Internal ice-sheet variability as source for the multi-century and millennial-scale iceberg events during the Holocene? A model study Bügelmayer-Blaschek, Marianne Roche, Didier M. Renssen, Hans Andrews, John T. Vrije Universiteit Amsterdam Amsterdam (VU) Modélisation du climat (CLIM) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) University of Colorado Boulder 2016 https://hal.archives-ouvertes.fr/hal-01587575 https://hal.archives-ouvertes.fr/hal-01587575/document https://hal.archives-ouvertes.fr/hal-01587575/file/fic6_1.pdf https://doi.org/10.1016/j.quascirev.2016.01.026 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2016.01.026 hal-01587575 https://hal.archives-ouvertes.fr/hal-01587575 https://hal.archives-ouvertes.fr/hal-01587575/document https://hal.archives-ouvertes.fr/hal-01587575/file/fic6_1.pdf doi:10.1016/j.quascirev.2016.01.026 info:eu-repo/semantics/OpenAccess ISSN: 0277-3791 Quaternary Science Reviews https://hal.archives-ouvertes.fr/hal-01587575 Quaternary Science Reviews, Elsevier, 2016, 138, pp.119 - 130. ⟨10.1016/j.quascirev.2016.01.026⟩ Climate modeling Icebergs Bond events Holocene Greenland ice sheet [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1016/j.quascirev.2016.01.026 2021-12-19T00:02:39Z International audience The climate of the Holocene, the current interglacial covering the past 11,700 years, has been relatively stable compared to previous periods. Nevertheless, repeating occurrence of rapid natural climate changes that challenged human society are seen in proxy reconstructions. Ocean sediment cores for example display prominent peaks of enhanced ice rafted debris (IRD) during the Holocene with a multi-decadal to millennial scale periodicity. Different mechanisms were proposed that caused these enhanced IRD events, for example variations in the incoming total solar irradiance (TSI), volcanic eruptions and the combination of internal climate variability and external forcings. We investigate the probable mechanisms causing the occurrence of IRD-events over the past 6000 years using a fully coupled climate - ice-sheet - iceberg model (iLOVECLIM). We performed 19 experiments that differ in the applied forcings (TSI, volcanic) and the initial atmospheric conditions. To explore internal ice sheet variability one further experiment was done with fixed climate conditions. All the model runs displayed prominent peaks of enhanced iceberg melt flux (IMF), independent of the chosen experimental set-up. The spectral analysis of the experiments with the ice-sheet - climate model coupled displays significant peaks at 2000, 1000 years in all the experiments and at 500 years in most runs. The experiment with fixed climate conditions displays one significant peak of about 1500 years related to internal ice sheet variability. This frequency is modulated to 2000 and 1000 years in all the experiments with a coupled climate - ice sheet due to interactions between the climate components. We further investigate the impact of minimum TSI events on the timing and occurrence of enhanced IMF. In the experimental set-up that was forced with idealized sinusoidal TSI variations (±4 Wm−2), we find a significant occurrence of an increased iceberg melt flux about 60 years after the minimum TSI value. Yet, we also see a ... Article in Journal/Newspaper Greenland Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Quaternary Science Reviews 138 119 130 |