A 21 000 cal years paleoclimatic record from Caçó Lake, northern Brazil: evidence from sedimentary and pollen analyses

Detalhes bibliográficos
Autor(a) principal: Sifeddine, Abdelfettah
Data de Publicação: 2003
Outros Autores: Albuquerque, Ana Luiza Spadano, Ledru, Marie-Pierre, Martin, Louis, Dominguez, José Maria Landim, Bittencourt, Abilio Carlos da Silva Pinto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/7375
Resumo: Texto completo: acesso restrito. p.25-34
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spelling Sifeddine, AbdelfettahAlbuquerque, Ana Luiza SpadanoLedru, Marie-PierreMartin, LouisDominguez, José Maria LandimBittencourt, Abilio Carlos da Silva PintoSifeddine, AbdelfettahAlbuquerque, Ana Luiza SpadanoLedru, Marie-PierreMartin, LouisDominguez, José Maria LandimBittencourt, Abilio Carlos da Silva Pinto2012-12-10T17:15:00Z2003-010031-0182http://www.repositorio.ufba.br/ri/handle/ri/7375v. 189, n. 1-2Texto completo: acesso restrito. p.25-34Sedimentological studies including seismic profiles, mineralogy and organic geochemistry on two cores from the center and margin of Caçó Lake, Maranhão State, northern Brazil, revealed variable climatic and environmental conditions during the last 21 cal kyr BP. Between 21 and 17 cal kyr BP, during the Late Glacial Maximum, regional climate was predominantly dry, interrupted by short humid phases, as reflected by a succession of very thin layers of sand and organic matter. The Late Pleistocene climate was relatively wet as is suggested by rapid lake-level rise and forest expansion. The Late Pleistocene humid climate differed significantly from present conditions. We suggest that Late Glacial humid conditions were the consequence of intensification of the Inter-Tropical Convergence Zone or shifts of its position, resulting in Antarctic cold-front occurrences. The abrupt climatic changes during this period were marked by siderite deposition into Caçó Lake, which appears to be related to regional hydrologic changes linked to global/Northern Hemisphere events. The Holocene was characterized by lower moisture availability and a distinct dry period until 7 cal kyr BP, in response to South American insolation conditions.Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2012-12-10T17:15:00Z No. of bitstreams: 1 1-s2.0-S0031018202005916-main.pdf: 507516 bytes, checksum: 6ccb7a21b80ab991841e6c2b4d360a93 (MD5)Made available in DSpace on 2012-12-10T17:15:00Z (GMT). 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dc.title.pt_BR.fl_str_mv A 21 000 cal years paleoclimatic record from Caçó Lake, northern Brazil: evidence from sedimentary and pollen analyses
dc.title.alternative.pt_BR.fl_str_mv Palaeogeography, Palaeoclimatology, Palaeoecology
title A 21 000 cal years paleoclimatic record from Caçó Lake, northern Brazil: evidence from sedimentary and pollen analyses
spellingShingle A 21 000 cal years paleoclimatic record from Caçó Lake, northern Brazil: evidence from sedimentary and pollen analyses
Sifeddine, Abdelfettah
title_short A 21 000 cal years paleoclimatic record from Caçó Lake, northern Brazil: evidence from sedimentary and pollen analyses
title_full A 21 000 cal years paleoclimatic record from Caçó Lake, northern Brazil: evidence from sedimentary and pollen analyses
title_fullStr A 21 000 cal years paleoclimatic record from Caçó Lake, northern Brazil: evidence from sedimentary and pollen analyses
title_full_unstemmed A 21 000 cal years paleoclimatic record from Caçó Lake, northern Brazil: evidence from sedimentary and pollen analyses
title_sort A 21 000 cal years paleoclimatic record from Caçó Lake, northern Brazil: evidence from sedimentary and pollen analyses
author Sifeddine, Abdelfettah
author_facet Sifeddine, Abdelfettah
Albuquerque, Ana Luiza Spadano
Ledru, Marie-Pierre
Martin, Louis
Dominguez, José Maria Landim
Bittencourt, Abilio Carlos da Silva Pinto
author_role author
author2 Albuquerque, Ana Luiza Spadano
Ledru, Marie-Pierre
Martin, Louis
Dominguez, José Maria Landim
Bittencourt, Abilio Carlos da Silva Pinto
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Sifeddine, Abdelfettah
Albuquerque, Ana Luiza Spadano
Ledru, Marie-Pierre
Martin, Louis
Dominguez, José Maria Landim
Bittencourt, Abilio Carlos da Silva Pinto
Sifeddine, Abdelfettah
Albuquerque, Ana Luiza Spadano
Ledru, Marie-Pierre
Martin, Louis
Dominguez, José Maria Landim
Bittencourt, Abilio Carlos da Silva Pinto
description Texto completo: acesso restrito. p.25-34
publishDate 2003
dc.date.issued.fl_str_mv 2003-01
dc.date.accessioned.fl_str_mv 2012-12-10T17:15:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/7375
dc.identifier.issn.none.fl_str_mv 0031-0182
dc.identifier.number.pt_BR.fl_str_mv v. 189, n. 1-2
identifier_str_mv 0031-0182
v. 189, n. 1-2
url http://www.repositorio.ufba.br/ri/handle/ri/7375
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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