Sub-millennial climate variability from high resolution water isotopes in the EDC ice core
The EPICA Dome C (EDC) ice core provides the longest continuous climatic record, covering the last 800 000 years (800 kyr). A unique opportunity to investigate decadal to millennial variability during past glacial and interglacial periods is provided by the high-resolution water isotopic record ( δ...
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ftcopernicus:oai:publications.copernicus.org:egusphere102457 2023-05-15T16:06:18+02:00 Sub-millennial climate variability from high resolution water isotopes in the EDC ice core Grisart, Antoine Casado, Mathieu Gkinis, Vasileios Vinther, Bo Naveau, Philippe Vrac, Mathieu Laepple, Thomas Minster, Bénédicte Prié, Fréderic Stenni, Barbara Fourré, Elise Steen Larsen, Hans-Christian Jouzel, Jean Werner, Martin Pol, Katy Masson-Delmotte, Valérie Hoerhold, Maria Popp, Trevor Landais, Amaelle 2022-10-17 application/pdf https://doi.org/10.5194/egusphere-2022-168 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-168/ eng eng doi:10.5194/egusphere-2022-168 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-168/ eISSN: Text 2022 ftcopernicus https://doi.org/10.5194/egusphere-2022-168 2022-10-24T16:22:42Z The EPICA Dome C (EDC) ice core provides the longest continuous climatic record, covering the last 800 000 years (800 kyr). A unique opportunity to investigate decadal to millennial variability during past glacial and interglacial periods is provided by the high-resolution water isotopic record ( δ 18 O and δ D) available for the EDC ice core. We present here a continuous compilation of the EDC water isotopic record at a sample resolution of 11 cm, which consists of 27 000 δ 18 O measurements and 7920 δ D measurements (covering, respectively, 94 % and 27 % of the whole EDC record), including published and new measurements (2900 for both δ 18 O and δ D) for the last 800 kyr. Here, we demonstrate that repeated water isotope measurements of the same EDC samples from different depth intervals obtained using different analytical methods are comparable within analytical uncertainty. We thus combine all available EDC water isotope measurements to generate a high-resolution (11 cm) dataset for the past 800 kyr. A frequency decomposition of the most complete δ 18 O record and a simple assessment of the possible influence of diffusion on the measured profile shows that the variability at the multi-decadal to multi-centennial timescale is higher during glacial than during interglacial periods and higher during early interglacial isotopic maxima than during the Holocene. This analysis shows as well that during interglacial periods characterized by a temperature optimum at the beginning, the multi-centennial variability is strongest over this temperature optimum. Text EPICA ice core Copernicus Publications: E-Journals |
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English |
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The EPICA Dome C (EDC) ice core provides the longest continuous climatic record, covering the last 800 000 years (800 kyr). A unique opportunity to investigate decadal to millennial variability during past glacial and interglacial periods is provided by the high-resolution water isotopic record ( δ 18 O and δ D) available for the EDC ice core. We present here a continuous compilation of the EDC water isotopic record at a sample resolution of 11 cm, which consists of 27 000 δ 18 O measurements and 7920 δ D measurements (covering, respectively, 94 % and 27 % of the whole EDC record), including published and new measurements (2900 for both δ 18 O and δ D) for the last 800 kyr. Here, we demonstrate that repeated water isotope measurements of the same EDC samples from different depth intervals obtained using different analytical methods are comparable within analytical uncertainty. We thus combine all available EDC water isotope measurements to generate a high-resolution (11 cm) dataset for the past 800 kyr. A frequency decomposition of the most complete δ 18 O record and a simple assessment of the possible influence of diffusion on the measured profile shows that the variability at the multi-decadal to multi-centennial timescale is higher during glacial than during interglacial periods and higher during early interglacial isotopic maxima than during the Holocene. This analysis shows as well that during interglacial periods characterized by a temperature optimum at the beginning, the multi-centennial variability is strongest over this temperature optimum. |
format |
Text |
author |
Grisart, Antoine Casado, Mathieu Gkinis, Vasileios Vinther, Bo Naveau, Philippe Vrac, Mathieu Laepple, Thomas Minster, Bénédicte Prié, Fréderic Stenni, Barbara Fourré, Elise Steen Larsen, Hans-Christian Jouzel, Jean Werner, Martin Pol, Katy Masson-Delmotte, Valérie Hoerhold, Maria Popp, Trevor Landais, Amaelle |
spellingShingle |
Grisart, Antoine Casado, Mathieu Gkinis, Vasileios Vinther, Bo Naveau, Philippe Vrac, Mathieu Laepple, Thomas Minster, Bénédicte Prié, Fréderic Stenni, Barbara Fourré, Elise Steen Larsen, Hans-Christian Jouzel, Jean Werner, Martin Pol, Katy Masson-Delmotte, Valérie Hoerhold, Maria Popp, Trevor Landais, Amaelle Sub-millennial climate variability from high resolution water isotopes in the EDC ice core |
author_facet |
Grisart, Antoine Casado, Mathieu Gkinis, Vasileios Vinther, Bo Naveau, Philippe Vrac, Mathieu Laepple, Thomas Minster, Bénédicte Prié, Fréderic Stenni, Barbara Fourré, Elise Steen Larsen, Hans-Christian Jouzel, Jean Werner, Martin Pol, Katy Masson-Delmotte, Valérie Hoerhold, Maria Popp, Trevor Landais, Amaelle |
author_sort |
Grisart, Antoine |
title |
Sub-millennial climate variability from high resolution water isotopes in the EDC ice core |
title_short |
Sub-millennial climate variability from high resolution water isotopes in the EDC ice core |
title_full |
Sub-millennial climate variability from high resolution water isotopes in the EDC ice core |
title_fullStr |
Sub-millennial climate variability from high resolution water isotopes in the EDC ice core |
title_full_unstemmed |
Sub-millennial climate variability from high resolution water isotopes in the EDC ice core |
title_sort |
sub-millennial climate variability from high resolution water isotopes in the edc ice core |
publishDate |
2022 |
url |
https://doi.org/10.5194/egusphere-2022-168 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-168/ |
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EPICA ice core |
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EPICA ice core |
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eISSN: |
op_relation |
doi:10.5194/egusphere-2022-168 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-168/ |
op_doi |
https://doi.org/10.5194/egusphere-2022-168 |
_version_ |
1766402191823732736 |