Holocene climatic changes in Greenland: Different deuterium excess signals at Greenland Ice Core Project (GRIP) and NorthGRIP
International audience Water stable isotope measurements (δD and δ18O) have been conducted on the Holocene part of two deep Greenland ice cores (Greenland Ice Core Project (GRIP) and NorthGRIP), located ∼320 km apart. These combined measurements provide the first two continuous Greenland Holocene de...
Published in: | Journal of Geophysical Research: Atmospheres |
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Main Authors: | , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2005
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Subjects: | |
Online Access: | https://insu.hal.science/insu-00374873 https://insu.hal.science/insu-00374873/document https://insu.hal.science/insu-00374873/file/2004JD005575.pdf https://doi.org/10.1029/2004JD005575 |
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HAL Sorbonne Université |
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English |
topic |
paleoclimate polar ice sheet water cycle [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
paleoclimate polar ice sheet water cycle [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Masson-Delmotte, Valérie Landais, Amaelle Stievenard, M. Cattani, O. Falourd, S. Jouzel, Jean Johnsen, Sigfus J. Dahl-Jensen, Dorthe Sveinsbjornsdottir, A. White, J. W. C. Popp, T. Fischer, H. Holocene climatic changes in Greenland: Different deuterium excess signals at Greenland Ice Core Project (GRIP) and NorthGRIP |
topic_facet |
paleoclimate polar ice sheet water cycle [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Water stable isotope measurements (δD and δ18O) have been conducted on the Holocene part of two deep Greenland ice cores (Greenland Ice Core Project (GRIP) and NorthGRIP), located ∼320 km apart. These combined measurements provide the first two continuous Greenland Holocene deuterium excess profiles (d = δD − 8δ18O), a parameter strongly influenced by changes in moisture sources. We discuss here temporal and regional fluctuations of the deuterium excess within central to north Greenland, with a mean temporal resolution of ∼4 years. Although GRIP and NorthGRIP exhibit similar annual mean surface temperatures and δ18O levels, a significant offset of modern deuterium excess is observed between the two sites. We attribute this offset to a different mix of modern moisture sources, pointing to regional-scale differences in moisture advection toward Greenland. The common long-term deuterium excess Holocene increasing trend is probably related to the increased relative contribution of low-latitude moisture to Greenland snowfall, in response to the change in the Earth obliquity, as symmetrically observed in Antarctica. Three abrupt declines punctuate the GRIP excess record (8.2, 4.5, and 0.35 ka BP), suggesting associated reorganizations of the northern high latitudes hydrological cycle. The 8.2 ka BP event is characterized by (1) a rapid cooling followed by a progressive warming and (2) a deuterium excess cooling restricted to GRIP, therefore totally different from rapid events during glacial times. By contrast, the NorthGRIP deuterium excess record is more stable. We propose that a slightly larger proportion of moisture supplied by local storm tracks to GRIP induces an isotopic compensation mechanism between simultaneous site and source temperature coolings, resulting in a rather temperature-insensitive δ18O profile, together with well-marked deuterium excess amplitudes. NorthGRIP δ18O seems less biased by isotopic processes and should provide a more reliable past temperature record. |
author2 |
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)) Géochrononologie Traceurs Archéométrie (GEOTRAC) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) Science Institute University of Iceland Reykjavik Department of Geological Sciences Boulder University of Colorado Boulder Abteilung Klinische Sozialmedizin, Berufs- und Umweltdermatologie Universität Heidelberg Heidelberg = Heidelberg University Programme National d'Etude du Climat IMPAIRS |
format |
Article in Journal/Newspaper |
author |
Masson-Delmotte, Valérie Landais, Amaelle Stievenard, M. Cattani, O. Falourd, S. Jouzel, Jean Johnsen, Sigfus J. Dahl-Jensen, Dorthe Sveinsbjornsdottir, A. White, J. W. C. Popp, T. Fischer, H. |
author_facet |
Masson-Delmotte, Valérie Landais, Amaelle Stievenard, M. Cattani, O. Falourd, S. Jouzel, Jean Johnsen, Sigfus J. Dahl-Jensen, Dorthe Sveinsbjornsdottir, A. White, J. W. C. Popp, T. Fischer, H. |
author_sort |
Masson-Delmotte, Valérie |
title |
Holocene climatic changes in Greenland: Different deuterium excess signals at Greenland Ice Core Project (GRIP) and NorthGRIP |
title_short |
Holocene climatic changes in Greenland: Different deuterium excess signals at Greenland Ice Core Project (GRIP) and NorthGRIP |
title_full |
Holocene climatic changes in Greenland: Different deuterium excess signals at Greenland Ice Core Project (GRIP) and NorthGRIP |
title_fullStr |
Holocene climatic changes in Greenland: Different deuterium excess signals at Greenland Ice Core Project (GRIP) and NorthGRIP |
title_full_unstemmed |
Holocene climatic changes in Greenland: Different deuterium excess signals at Greenland Ice Core Project (GRIP) and NorthGRIP |
title_sort |
holocene climatic changes in greenland: different deuterium excess signals at greenland ice core project (grip) and northgrip |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://insu.hal.science/insu-00374873 https://insu.hal.science/insu-00374873/document https://insu.hal.science/insu-00374873/file/2004JD005575.pdf https://doi.org/10.1029/2004JD005575 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica Greenland Greenland ice core Greenland Ice core Project Greenland ice cores GRIP ice core Ice Sheet North Greenland |
genre_facet |
Antarc* Antarctica Greenland Greenland ice core Greenland Ice core Project Greenland ice cores GRIP ice core Ice Sheet North Greenland |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://insu.hal.science/insu-00374873 Journal of Geophysical Research: Atmospheres, 2005, 110 (D14102), 1 à 15 p. ⟨10.1029/2004JD005575⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2004JD005575 insu-00374873 https://insu.hal.science/insu-00374873 https://insu.hal.science/insu-00374873/document https://insu.hal.science/insu-00374873/file/2004JD005575.pdf doi:10.1029/2004JD005575 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2004JD005575 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
110 |
container_issue |
D14 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1801383784562556928 |
spelling |
ftsorbonneuniv:oai:HAL:insu-00374873v1 2024-06-09T07:40:22+00:00 Holocene climatic changes in Greenland: Different deuterium excess signals at Greenland Ice Core Project (GRIP) and NorthGRIP Masson-Delmotte, Valérie Landais, Amaelle Stievenard, M. Cattani, O. Falourd, S. Jouzel, Jean Johnsen, Sigfus J. Dahl-Jensen, Dorthe Sveinsbjornsdottir, A. White, J. W. C. Popp, T. Fischer, H. 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)) Géochrononologie Traceurs Archéométrie (GEOTRAC) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) Science Institute University of Iceland Reykjavik Department of Geological Sciences Boulder University of Colorado Boulder Abteilung Klinische Sozialmedizin, Berufs- und Umweltdermatologie Universität Heidelberg Heidelberg = Heidelberg University Programme National d'Etude du Climat IMPAIRS 2005 https://insu.hal.science/insu-00374873 https://insu.hal.science/insu-00374873/document https://insu.hal.science/insu-00374873/file/2004JD005575.pdf https://doi.org/10.1029/2004JD005575 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2004JD005575 insu-00374873 https://insu.hal.science/insu-00374873 https://insu.hal.science/insu-00374873/document https://insu.hal.science/insu-00374873/file/2004JD005575.pdf doi:10.1029/2004JD005575 info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://insu.hal.science/insu-00374873 Journal of Geophysical Research: Atmospheres, 2005, 110 (D14102), 1 à 15 p. ⟨10.1029/2004JD005575⟩ paleoclimate polar ice sheet water cycle [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2005 ftsorbonneuniv https://doi.org/10.1029/2004JD005575 2024-05-16T23:56:30Z International audience Water stable isotope measurements (δD and δ18O) have been conducted on the Holocene part of two deep Greenland ice cores (Greenland Ice Core Project (GRIP) and NorthGRIP), located ∼320 km apart. These combined measurements provide the first two continuous Greenland Holocene deuterium excess profiles (d = δD − 8δ18O), a parameter strongly influenced by changes in moisture sources. We discuss here temporal and regional fluctuations of the deuterium excess within central to north Greenland, with a mean temporal resolution of ∼4 years. Although GRIP and NorthGRIP exhibit similar annual mean surface temperatures and δ18O levels, a significant offset of modern deuterium excess is observed between the two sites. We attribute this offset to a different mix of modern moisture sources, pointing to regional-scale differences in moisture advection toward Greenland. The common long-term deuterium excess Holocene increasing trend is probably related to the increased relative contribution of low-latitude moisture to Greenland snowfall, in response to the change in the Earth obliquity, as symmetrically observed in Antarctica. Three abrupt declines punctuate the GRIP excess record (8.2, 4.5, and 0.35 ka BP), suggesting associated reorganizations of the northern high latitudes hydrological cycle. The 8.2 ka BP event is characterized by (1) a rapid cooling followed by a progressive warming and (2) a deuterium excess cooling restricted to GRIP, therefore totally different from rapid events during glacial times. By contrast, the NorthGRIP deuterium excess record is more stable. We propose that a slightly larger proportion of moisture supplied by local storm tracks to GRIP induces an isotopic compensation mechanism between simultaneous site and source temperature coolings, resulting in a rather temperature-insensitive δ18O profile, together with well-marked deuterium excess amplitudes. NorthGRIP δ18O seems less biased by isotopic processes and should provide a more reliable past temperature record. Article in Journal/Newspaper Antarc* Antarctica Greenland Greenland ice core Greenland Ice core Project Greenland ice cores GRIP ice core Ice Sheet North Greenland HAL Sorbonne Université Greenland Journal of Geophysical Research: Atmospheres 110 D14 n/a n/a |