Challenges in C-14 dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the Laschamp geomagnetic field minimum
The C-14 dating method is the cornerstone for inferring age estimates for natural archives covering the last 50 000 yrs. However, C-14 age calibration for the last ice age relies mostly on records that only indirectly reflect the atmospheric C-14 concentrations. In consequence, calendar age estimate...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://lup.lub.lu.se/record/4470537 https://doi.org/10.1016/j.epsl.2014.03.024 |
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ftulundlup:oai:lup.lub.lu.se:cef58de2-c559-44a7-b202-cdf127bd2668 2023-05-15T16:38:41+02:00 Challenges in C-14 dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the Laschamp geomagnetic field minimum Muscheler, Raimund Adolphi, Florian Svensson, Anders 2014 https://lup.lub.lu.se/record/4470537 https://doi.org/10.1016/j.epsl.2014.03.024 eng eng Elsevier https://lup.lub.lu.se/record/4470537 http://dx.doi.org/10.1016/j.epsl.2014.03.024 wos:000335613300021 scopus:84897538354 Earth and Planetary Science Letters; 394, pp 209-215 (2014) ISSN: 1385-013X Geology C-14 calibration Be-10 Laschamp event cosmic rays cosmogenic radionuclides chronology contributiontojournal/article info:eu-repo/semantics/article text 2014 ftulundlup https://doi.org/10.1016/j.epsl.2014.03.024 2023-02-01T23:29:44Z The C-14 dating method is the cornerstone for inferring age estimates for natural archives covering the last 50 000 yrs. However, C-14 age calibration for the last ice age relies mostly on records that only indirectly reflect the atmospheric C-14 concentrations. In consequence, calendar age estimates are significantly more uncertain for the period of the last ice age compared to the past 14000 yrs where tree-ring based calibration records exist. Here we connect a C-14 tree-ring chronology from Kauri trees in New Zealand to ice core Be-10 records via the common signal in the galactic cosmic ray flux around the period of the Laschamp geomagnetic field minimum (ca. 41 000 yrs BP). Synchronous changes of modelled C-14 and C-14 inferred from U/Th-dated speleothems support the ice core chronology independently and suggest that the published ice core time scale errors are rather conservative for this period. Our analysis puts C-14 age determinations directly into the context of ice core climate records and it shows that the C-14 records underlying the C-14 calibration curve overestimate the atmospheric C-14 concentration by more than 200 parts per thousand. Consequently, C-14 age calibration presently yields too old calendar age estimates by about 1200 yrs for this period. (C) 2014 Elsevier B.V. All rights reserved. Article in Journal/Newspaper ice core Lund University Publications (LUP) New Zealand Earth and Planetary Science Letters 394 209 215 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology C-14 calibration Be-10 Laschamp event cosmic rays cosmogenic radionuclides chronology |
spellingShingle |
Geology C-14 calibration Be-10 Laschamp event cosmic rays cosmogenic radionuclides chronology Muscheler, Raimund Adolphi, Florian Svensson, Anders Challenges in C-14 dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the Laschamp geomagnetic field minimum |
topic_facet |
Geology C-14 calibration Be-10 Laschamp event cosmic rays cosmogenic radionuclides chronology |
description |
The C-14 dating method is the cornerstone for inferring age estimates for natural archives covering the last 50 000 yrs. However, C-14 age calibration for the last ice age relies mostly on records that only indirectly reflect the atmospheric C-14 concentrations. In consequence, calendar age estimates are significantly more uncertain for the period of the last ice age compared to the past 14000 yrs where tree-ring based calibration records exist. Here we connect a C-14 tree-ring chronology from Kauri trees in New Zealand to ice core Be-10 records via the common signal in the galactic cosmic ray flux around the period of the Laschamp geomagnetic field minimum (ca. 41 000 yrs BP). Synchronous changes of modelled C-14 and C-14 inferred from U/Th-dated speleothems support the ice core chronology independently and suggest that the published ice core time scale errors are rather conservative for this period. Our analysis puts C-14 age determinations directly into the context of ice core climate records and it shows that the C-14 records underlying the C-14 calibration curve overestimate the atmospheric C-14 concentration by more than 200 parts per thousand. Consequently, C-14 age calibration presently yields too old calendar age estimates by about 1200 yrs for this period. (C) 2014 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Muscheler, Raimund Adolphi, Florian Svensson, Anders |
author_facet |
Muscheler, Raimund Adolphi, Florian Svensson, Anders |
author_sort |
Muscheler, Raimund |
title |
Challenges in C-14 dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the Laschamp geomagnetic field minimum |
title_short |
Challenges in C-14 dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the Laschamp geomagnetic field minimum |
title_full |
Challenges in C-14 dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the Laschamp geomagnetic field minimum |
title_fullStr |
Challenges in C-14 dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the Laschamp geomagnetic field minimum |
title_full_unstemmed |
Challenges in C-14 dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the Laschamp geomagnetic field minimum |
title_sort |
challenges in c-14 dating towards the limit of the method inferred from anchoring a floating tree ring radiocarbon chronology to ice core records around the laschamp geomagnetic field minimum |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://lup.lub.lu.se/record/4470537 https://doi.org/10.1016/j.epsl.2014.03.024 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
ice core |
genre_facet |
ice core |
op_source |
Earth and Planetary Science Letters; 394, pp 209-215 (2014) ISSN: 1385-013X |
op_relation |
https://lup.lub.lu.se/record/4470537 http://dx.doi.org/10.1016/j.epsl.2014.03.024 wos:000335613300021 scopus:84897538354 |
op_doi |
https://doi.org/10.1016/j.epsl.2014.03.024 |
container_title |
Earth and Planetary Science Letters |
container_volume |
394 |
container_start_page |
209 |
op_container_end_page |
215 |
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1766028995396108288 |