Precise radiocarbon dating of Late-Glacial cooling in mid-latitude South America
Abstract Variability of atmospheric 14 C content often complicates radiocarbon-based chronologies; however, specific features such as periods of constant 14 C age or steep changes in radiocarbon ages can be useful stratigraphic markers. The Younger Dryas event in the Northern Hemisphere is one of th...
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Cambridge University Press (CUP)
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crcambridgeupr:10.1016/s0033-5894(02)00017-0 2024-06-23T07:55:09+00:00 Precise radiocarbon dating of Late-Glacial cooling in mid-latitude South America Hajdas, Irka Bonani, Georges Moreno, Patricio I. Ariztegui, Daniel 2003 http://dx.doi.org/10.1016/s0033-5894(02)00017-0 http://api.elsevier.com/content/article/PII:S0033589402000170?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589402000170?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400011686 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 59, issue 1, page 70-78 ISSN 0033-5894 1096-0287 journal-article 2003 crcambridgeupr https://doi.org/10.1016/s0033-5894(02)00017-0 2024-06-05T04:02:29Z Abstract Variability of atmospheric 14 C content often complicates radiocarbon-based chronologies; however, specific features such as periods of constant 14 C age or steep changes in radiocarbon ages can be useful stratigraphic markers. The Younger Dryas event in the Northern Hemisphere is one of those periods, showing conspicuous 14 C wiggles. Although the origin of those variations is not fully understood, we can make practical use of them and determine: (i) whether the Younger Dryas was global in extent; if so, (ii) were the initial cooling and the final warming synchronous worldwide; and (iii) what are the implications of these similarities/differences? Here we report high-resolution AMS 14 C chronologies from the mid-latitudes of South America that pinpoint a cool episode between 11,400 and 10,200 14 C yr B.P. The onset of the final cool episode of the Late Glacial in the southern mid-latitudes, i.e., the Huelmo/Mascardi Cold Reversal, preceded the onset of the Younger Dryas cold event by ∼550 calendar years. Both events ended during a radiocarbon-age plateau at ∼10,200 14 C yr B.P. Thus, the Huelmo/Mascardi Cold Reversal encompasses the Younger Dryas, as well as a couple of short-term cool/warm oscillations that immediately preceded its onset in the North Atlantic region. Article in Journal/Newspaper North Atlantic Cambridge University Press Mascardi ENVELOPE(-61.717,-61.717,-66.200,-66.200) Quaternary Research 59 1 70 78 |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Variability of atmospheric 14 C content often complicates radiocarbon-based chronologies; however, specific features such as periods of constant 14 C age or steep changes in radiocarbon ages can be useful stratigraphic markers. The Younger Dryas event in the Northern Hemisphere is one of those periods, showing conspicuous 14 C wiggles. Although the origin of those variations is not fully understood, we can make practical use of them and determine: (i) whether the Younger Dryas was global in extent; if so, (ii) were the initial cooling and the final warming synchronous worldwide; and (iii) what are the implications of these similarities/differences? Here we report high-resolution AMS 14 C chronologies from the mid-latitudes of South America that pinpoint a cool episode between 11,400 and 10,200 14 C yr B.P. The onset of the final cool episode of the Late Glacial in the southern mid-latitudes, i.e., the Huelmo/Mascardi Cold Reversal, preceded the onset of the Younger Dryas cold event by ∼550 calendar years. Both events ended during a radiocarbon-age plateau at ∼10,200 14 C yr B.P. Thus, the Huelmo/Mascardi Cold Reversal encompasses the Younger Dryas, as well as a couple of short-term cool/warm oscillations that immediately preceded its onset in the North Atlantic region. |
format |
Article in Journal/Newspaper |
author |
Hajdas, Irka Bonani, Georges Moreno, Patricio I. Ariztegui, Daniel |
spellingShingle |
Hajdas, Irka Bonani, Georges Moreno, Patricio I. Ariztegui, Daniel Precise radiocarbon dating of Late-Glacial cooling in mid-latitude South America |
author_facet |
Hajdas, Irka Bonani, Georges Moreno, Patricio I. Ariztegui, Daniel |
author_sort |
Hajdas, Irka |
title |
Precise radiocarbon dating of Late-Glacial cooling in mid-latitude South America |
title_short |
Precise radiocarbon dating of Late-Glacial cooling in mid-latitude South America |
title_full |
Precise radiocarbon dating of Late-Glacial cooling in mid-latitude South America |
title_fullStr |
Precise radiocarbon dating of Late-Glacial cooling in mid-latitude South America |
title_full_unstemmed |
Precise radiocarbon dating of Late-Glacial cooling in mid-latitude South America |
title_sort |
precise radiocarbon dating of late-glacial cooling in mid-latitude south america |
publisher |
Cambridge University Press (CUP) |
publishDate |
2003 |
url |
http://dx.doi.org/10.1016/s0033-5894(02)00017-0 http://api.elsevier.com/content/article/PII:S0033589402000170?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589402000170?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400011686 |
long_lat |
ENVELOPE(-61.717,-61.717,-66.200,-66.200) |
geographic |
Mascardi |
geographic_facet |
Mascardi |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Quaternary Research volume 59, issue 1, page 70-78 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/s0033-5894(02)00017-0 |
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Quaternary Research |
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59 |
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1 |
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70 |
op_container_end_page |
78 |
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1802647613129883648 |