Changes in deep-water formation during the Younger Dryas event inferred from 10 Be and 14 C records
Variations in atmospheric radiocarbon ( 14 C) concentrations can be attributed either to changes in the carbon cycle 1 —through the rate of radiocarbon removal from the atmosphere—or to variations in the production rate of 14 C due to changes in solar activity or the Earth's magnetic field 2 ....
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Online Access: | https://doi.org/10.1038/35046041 |
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fteawag:oai:dora:eawag_4105 2023-05-15T16:39:14+02:00 Changes in deep-water formation during the Younger Dryas event inferred from 10 Be and 14 C records Muscheler, Raimund Beer, Jürg Wagner, Gerhard Finkel, Robert C. 2000 https://doi.org/10.1038/35046041 eng eng Springer Nature Nature--Nature--journals:2176--0028-0836--1476-4687 eawag:4105 journal id: journals:2176 issn: 0028-0836 e-issn: 1476-4687 ut: 000165548600113 local: 5894 scopus: 2-s2.0-0034735758 doi:10.1038/35046041 Text Journal Article 2000 fteawag https://doi.org/10.1038/35046041 2023-04-09T04:48:23Z Variations in atmospheric radiocarbon ( 14 C) concentrations can be attributed either to changes in the carbon cycle 1 —through the rate of radiocarbon removal from the atmosphere—or to variations in the production rate of 14 C due to changes in solar activity or the Earth's magnetic field 2 . The production rates of 10 Be and 14 C vary in the same way, but whereas atmospheric radiocarbon concentrations are additionally affected by the carbon cycle, 10 Be concentrations reflect production rates more directly. A record of the 10 Be production-rate variations can therefore be used to separate the two influences-production rates and the carbon cycle-on radiocarbon concentrations. Here we present such an analysis of the large fluctuations in atmospheric 14 C concentrations, of unclear origin 3 , that occurred during the Younger Dryas cold period 6 . We use the 10 Be record from the GISP2 ice core 5 to model past production rates of radionuclides, and rnd that the largest part of the fluctuations in atmospheric radiocarbon concentrations can be attributed to variations in production rate. The residual difference between measured 14 C concentrations and those modelled using the 10 Be record can be explained with an additional change in the carbon cycle, most probably in the amount of deep-water formation. Article in Journal/Newspaper ice core DORA Eawag Nature 408 6812 567 570 |
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Variations in atmospheric radiocarbon ( 14 C) concentrations can be attributed either to changes in the carbon cycle 1 —through the rate of radiocarbon removal from the atmosphere—or to variations in the production rate of 14 C due to changes in solar activity or the Earth's magnetic field 2 . The production rates of 10 Be and 14 C vary in the same way, but whereas atmospheric radiocarbon concentrations are additionally affected by the carbon cycle, 10 Be concentrations reflect production rates more directly. A record of the 10 Be production-rate variations can therefore be used to separate the two influences-production rates and the carbon cycle-on radiocarbon concentrations. Here we present such an analysis of the large fluctuations in atmospheric 14 C concentrations, of unclear origin 3 , that occurred during the Younger Dryas cold period 6 . We use the 10 Be record from the GISP2 ice core 5 to model past production rates of radionuclides, and rnd that the largest part of the fluctuations in atmospheric radiocarbon concentrations can be attributed to variations in production rate. The residual difference between measured 14 C concentrations and those modelled using the 10 Be record can be explained with an additional change in the carbon cycle, most probably in the amount of deep-water formation. |
format |
Article in Journal/Newspaper |
author |
Muscheler, Raimund Beer, Jürg Wagner, Gerhard Finkel, Robert C. |
spellingShingle |
Muscheler, Raimund Beer, Jürg Wagner, Gerhard Finkel, Robert C. Changes in deep-water formation during the Younger Dryas event inferred from 10 Be and 14 C records |
author_facet |
Muscheler, Raimund Beer, Jürg Wagner, Gerhard Finkel, Robert C. |
author_sort |
Muscheler, Raimund |
title |
Changes in deep-water formation during the Younger Dryas event inferred from 10 Be and 14 C records |
title_short |
Changes in deep-water formation during the Younger Dryas event inferred from 10 Be and 14 C records |
title_full |
Changes in deep-water formation during the Younger Dryas event inferred from 10 Be and 14 C records |
title_fullStr |
Changes in deep-water formation during the Younger Dryas event inferred from 10 Be and 14 C records |
title_full_unstemmed |
Changes in deep-water formation during the Younger Dryas event inferred from 10 Be and 14 C records |
title_sort |
changes in deep-water formation during the younger dryas event inferred from 10 be and 14 c records |
publisher |
Springer Nature |
publishDate |
2000 |
url |
https://doi.org/10.1038/35046041 |
genre |
ice core |
genre_facet |
ice core |
op_relation |
Nature--Nature--journals:2176--0028-0836--1476-4687 eawag:4105 journal id: journals:2176 issn: 0028-0836 e-issn: 1476-4687 ut: 000165548600113 local: 5894 scopus: 2-s2.0-0034735758 doi:10.1038/35046041 |
op_doi |
https://doi.org/10.1038/35046041 |
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Nature |
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408 |
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6812 |
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567 |
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570 |
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1766029570701524992 |