Geochemical evidence of the 8.2 ka event and other Holocene environmental changes recorded in paleolagoon sediments, southeastern Brazil
The paleoclimatic record of Juréia Paleolagoon, coastal southeastern Brazil, includes cyclic and gradual changes with different intensities and frequencies through geological time, and it is controlled by astronomical, geophysical, and geological phenomena. These variations are not due to one single...
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2012
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Online Access: | http://dx.doi.org/10.1016/j.yqres.2011.09.007 http://api.elsevier.com/content/article/PII:S0033589411001189?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589411001189?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400008115 |
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crcambridgeupr:10.1016/j.yqres.2011.09.007 2024-06-09T07:48:15+00:00 Geochemical evidence of the 8.2 ka event and other Holocene environmental changes recorded in paleolagoon sediments, southeastern Brazil Sallun, Alethéa E.M. Sallun Filho, William Suguio, Kenitiro Babinski, Marly Gioia, Simone M.C.L. Harlow, Benjamin A. Duleba, Wania De Oliveira, Paulo E. Garcia, Maria Judite Weber, Cinthia Z. Christofoletti, Sérgio R. Santos, Camilla da S. Medeiros, Vanda B. de Silva, Juliana B. Santiago-Hussein, Maria Cristina Fernandes, Rosana S. FAPESP CNPq 2012 http://dx.doi.org/10.1016/j.yqres.2011.09.007 http://api.elsevier.com/content/article/PII:S0033589411001189?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589411001189?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400008115 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 77, issue 1, page 31-43 ISSN 0033-5894 1096-0287 journal-article 2012 crcambridgeupr https://doi.org/10.1016/j.yqres.2011.09.007 2024-05-15T13:03:04Z The paleoclimatic record of Juréia Paleolagoon, coastal southeastern Brazil, includes cyclic and gradual changes with different intensities and frequencies through geological time, and it is controlled by astronomical, geophysical, and geological phenomena. These variations are not due to one single cause, but they result from the interaction of several factors, which act at different temporal and spatial scales. Here, we describe paleoenvironmental evidence regarding climatic and sea level changes from the last 9400 cal yr BP at the Juréia Paleolagoon – one of the main groups of protected South Atlantic ecosystems. Geochemical evidences were used to identify anomalies from multi-proxy analyses of a paleolagoon sediment core. The anomalies of centennial scale were correlated to climate and transgression–regression cycles from the Holocene period. Decadal scale anomalous oscillations in the Quaternary paleolagoon sediments occur between 9400 and 7500 cal yr BP, correlated with long- and short-term natural events, which generated high sedimentation rates, mainly between 8385 and 8375 cal yr BP (10 cm/yr). Our results suggest that a modern-day short-duration North Atlantic climatic event, such as the 8.2 ka event, could affect the environmental equilibrium in South America and intensify the South American Summer Monsoon. Article in Journal/Newspaper North Atlantic Cambridge University Press Quaternary Research 77 1 31 43 |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
The paleoclimatic record of Juréia Paleolagoon, coastal southeastern Brazil, includes cyclic and gradual changes with different intensities and frequencies through geological time, and it is controlled by astronomical, geophysical, and geological phenomena. These variations are not due to one single cause, but they result from the interaction of several factors, which act at different temporal and spatial scales. Here, we describe paleoenvironmental evidence regarding climatic and sea level changes from the last 9400 cal yr BP at the Juréia Paleolagoon – one of the main groups of protected South Atlantic ecosystems. Geochemical evidences were used to identify anomalies from multi-proxy analyses of a paleolagoon sediment core. The anomalies of centennial scale were correlated to climate and transgression–regression cycles from the Holocene period. Decadal scale anomalous oscillations in the Quaternary paleolagoon sediments occur between 9400 and 7500 cal yr BP, correlated with long- and short-term natural events, which generated high sedimentation rates, mainly between 8385 and 8375 cal yr BP (10 cm/yr). Our results suggest that a modern-day short-duration North Atlantic climatic event, such as the 8.2 ka event, could affect the environmental equilibrium in South America and intensify the South American Summer Monsoon. |
author2 |
FAPESP CNPq |
format |
Article in Journal/Newspaper |
author |
Sallun, Alethéa E.M. Sallun Filho, William Suguio, Kenitiro Babinski, Marly Gioia, Simone M.C.L. Harlow, Benjamin A. Duleba, Wania De Oliveira, Paulo E. Garcia, Maria Judite Weber, Cinthia Z. Christofoletti, Sérgio R. Santos, Camilla da S. Medeiros, Vanda B. de Silva, Juliana B. Santiago-Hussein, Maria Cristina Fernandes, Rosana S. |
spellingShingle |
Sallun, Alethéa E.M. Sallun Filho, William Suguio, Kenitiro Babinski, Marly Gioia, Simone M.C.L. Harlow, Benjamin A. Duleba, Wania De Oliveira, Paulo E. Garcia, Maria Judite Weber, Cinthia Z. Christofoletti, Sérgio R. Santos, Camilla da S. Medeiros, Vanda B. de Silva, Juliana B. Santiago-Hussein, Maria Cristina Fernandes, Rosana S. Geochemical evidence of the 8.2 ka event and other Holocene environmental changes recorded in paleolagoon sediments, southeastern Brazil |
author_facet |
Sallun, Alethéa E.M. Sallun Filho, William Suguio, Kenitiro Babinski, Marly Gioia, Simone M.C.L. Harlow, Benjamin A. Duleba, Wania De Oliveira, Paulo E. Garcia, Maria Judite Weber, Cinthia Z. Christofoletti, Sérgio R. Santos, Camilla da S. Medeiros, Vanda B. de Silva, Juliana B. Santiago-Hussein, Maria Cristina Fernandes, Rosana S. |
author_sort |
Sallun, Alethéa E.M. |
title |
Geochemical evidence of the 8.2 ka event and other Holocene environmental changes recorded in paleolagoon sediments, southeastern Brazil |
title_short |
Geochemical evidence of the 8.2 ka event and other Holocene environmental changes recorded in paleolagoon sediments, southeastern Brazil |
title_full |
Geochemical evidence of the 8.2 ka event and other Holocene environmental changes recorded in paleolagoon sediments, southeastern Brazil |
title_fullStr |
Geochemical evidence of the 8.2 ka event and other Holocene environmental changes recorded in paleolagoon sediments, southeastern Brazil |
title_full_unstemmed |
Geochemical evidence of the 8.2 ka event and other Holocene environmental changes recorded in paleolagoon sediments, southeastern Brazil |
title_sort |
geochemical evidence of the 8.2 ka event and other holocene environmental changes recorded in paleolagoon sediments, southeastern brazil |
publisher |
Cambridge University Press (CUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1016/j.yqres.2011.09.007 http://api.elsevier.com/content/article/PII:S0033589411001189?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589411001189?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400008115 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Quaternary Research volume 77, issue 1, page 31-43 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2011.09.007 |
container_title |
Quaternary Research |
container_volume |
77 |
container_issue |
1 |
container_start_page |
31 |
op_container_end_page |
43 |
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1801379886180335616 |