Stratigraphic templates for ice core records of the past 1.5 Myr
The international ice core community has a target to obtain continuous ice cores stretching back as far as 1.5 Myr. This would provide vital data (including a CO2 profile) allowing us to assess ideas about the cause of the Mid-Pleistocene Transition (MPT). The European Beyond EPICA project and the A...
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Copernicus Publications
2022
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Online Access: | https://doi.org/10.5194/cp-18-1563-2022 https://cp.copernicus.org/articles/18/1563/2022/cp-18-1563-2022.pdf https://doaj.org/article/ce878389edb34d5188fafb423050f9b7 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:ce878389edb34d5188fafb423050f9b7 2023-05-15T13:55:01+02:00 Stratigraphic templates for ice core records of the past 1.5 Myr E. W. Wolff H. Fischer T. van Ommen D. A. Hodell 2022-07-01 https://doi.org/10.5194/cp-18-1563-2022 https://cp.copernicus.org/articles/18/1563/2022/cp-18-1563-2022.pdf https://doaj.org/article/ce878389edb34d5188fafb423050f9b7 en eng Copernicus Publications doi:10.5194/cp-18-1563-2022 1814-9324 1814-9332 https://cp.copernicus.org/articles/18/1563/2022/cp-18-1563-2022.pdf https://doaj.org/article/ce878389edb34d5188fafb423050f9b7 undefined Climate of the Past, Vol 18, Pp 1563-1577 (2022) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.5194/cp-18-1563-2022 2023-01-22T17:53:20Z The international ice core community has a target to obtain continuous ice cores stretching back as far as 1.5 Myr. This would provide vital data (including a CO2 profile) allowing us to assess ideas about the cause of the Mid-Pleistocene Transition (MPT). The European Beyond EPICA project and the Australian Million Year Ice Core project each plan to drill such a core in the region known as Little Dome C. Dating the cores will be challenging, and one approach will be to match some of the records obtained with existing marine sediment datasets, informed by similarities in the existing 800 kyr period. Water isotopes in Antarctica have been shown to closely mirror deepwater temperature, estimated from Mg/Ca ratios of benthic foraminifera, in a marine core on the Chatham Rise near to New Zealand. The dust record in ice cores resembles very closely a South Atlantic marine record of iron accumulation rate. By assuming these relationships continue beyond 800 ka, our ice core record could be synchronised to dated marine sediments. This could be supplemented, and allow synchronisation at higher resolution, by the identification of rapid millennial-scale events that are observed both in Antarctic methane records and in emerging records of planktic oxygen isotopes and alkenone sea surface temperature (SST) from the Portuguese Margin. Although published data remain quite sparse, it should also be possible to match 10Be from ice cores to records of geomagnetic palaeo-intensity and authigenic 10Be/9Be in marine sediments. However, there are a number of issues that have to be resolved before the ice core 10Be record can be used. The approach of matching records to a template will be most successful if the new core is in stratigraphic order but should also provide constraints on disordered records if used in combination with absolute radiogenic ages. Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA ice core Unknown Antarctic New Zealand Climate of the Past 18 7 1563 1577 |
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English |
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envir geo E. W. Wolff H. Fischer T. van Ommen D. A. Hodell Stratigraphic templates for ice core records of the past 1.5 Myr |
topic_facet |
envir geo |
description |
The international ice core community has a target to obtain continuous ice cores stretching back as far as 1.5 Myr. This would provide vital data (including a CO2 profile) allowing us to assess ideas about the cause of the Mid-Pleistocene Transition (MPT). The European Beyond EPICA project and the Australian Million Year Ice Core project each plan to drill such a core in the region known as Little Dome C. Dating the cores will be challenging, and one approach will be to match some of the records obtained with existing marine sediment datasets, informed by similarities in the existing 800 kyr period. Water isotopes in Antarctica have been shown to closely mirror deepwater temperature, estimated from Mg/Ca ratios of benthic foraminifera, in a marine core on the Chatham Rise near to New Zealand. The dust record in ice cores resembles very closely a South Atlantic marine record of iron accumulation rate. By assuming these relationships continue beyond 800 ka, our ice core record could be synchronised to dated marine sediments. This could be supplemented, and allow synchronisation at higher resolution, by the identification of rapid millennial-scale events that are observed both in Antarctic methane records and in emerging records of planktic oxygen isotopes and alkenone sea surface temperature (SST) from the Portuguese Margin. Although published data remain quite sparse, it should also be possible to match 10Be from ice cores to records of geomagnetic palaeo-intensity and authigenic 10Be/9Be in marine sediments. However, there are a number of issues that have to be resolved before the ice core 10Be record can be used. The approach of matching records to a template will be most successful if the new core is in stratigraphic order but should also provide constraints on disordered records if used in combination with absolute radiogenic ages. |
format |
Article in Journal/Newspaper |
author |
E. W. Wolff H. Fischer T. van Ommen D. A. Hodell |
author_facet |
E. W. Wolff H. Fischer T. van Ommen D. A. Hodell |
author_sort |
E. W. Wolff |
title |
Stratigraphic templates for ice core records of the past 1.5 Myr |
title_short |
Stratigraphic templates for ice core records of the past 1.5 Myr |
title_full |
Stratigraphic templates for ice core records of the past 1.5 Myr |
title_fullStr |
Stratigraphic templates for ice core records of the past 1.5 Myr |
title_full_unstemmed |
Stratigraphic templates for ice core records of the past 1.5 Myr |
title_sort |
stratigraphic templates for ice core records of the past 1.5 myr |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-18-1563-2022 https://cp.copernicus.org/articles/18/1563/2022/cp-18-1563-2022.pdf https://doaj.org/article/ce878389edb34d5188fafb423050f9b7 |
geographic |
Antarctic New Zealand |
geographic_facet |
Antarctic New Zealand |
genre |
Antarc* Antarctic Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica EPICA ice core |
op_source |
Climate of the Past, Vol 18, Pp 1563-1577 (2022) |
op_relation |
doi:10.5194/cp-18-1563-2022 1814-9324 1814-9332 https://cp.copernicus.org/articles/18/1563/2022/cp-18-1563-2022.pdf https://doaj.org/article/ce878389edb34d5188fafb423050f9b7 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-18-1563-2022 |
container_title |
Climate of the Past |
container_volume |
18 |
container_issue |
7 |
container_start_page |
1563 |
op_container_end_page |
1577 |
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