Late-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern Brazil
Main Author: | |
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Publication Date: | 2001 |
Other Authors: | , , , , , |
Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UFBA |
Download full: | http://www.repositorio.ufba.br/ri/handle/ri/7789 |
Summary: | Texto completo: acesso restrito. p.47–56 |
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Ledru, Marie-PierreCordeiro, Renato CampelloDominguez, José Maria LandimMartin, LouisMourguiart, PhilippeSifeddine, AbdelfetahTurcq, BrunoLedru, Marie-PierreCordeiro, Renato CampelloDominguez, José Maria LandimMartin, LouisMourguiart, PhilippeSifeddine, AbdelfetahTurcq, Bruno2013-01-10T13:05:08Z20010033-5894http://www.repositorio.ufba.br/ri/handle/ri/7789v. 55, n.1Texto completo: acesso restrito. p.47–56New pollen data from a core at Lagoa do Caçó, Maranhão state, Brazil (2°58′S 43°25′W; 120 m elevation), show higher frequencies of Podocarpus at the end of the Pleistocene than today. The increase in Podocarpus, which follows the successive increase of various pioneer species such as Didymopanax, Melastomataceae/Combretaceae, and Cecropia, implies a progressive late-glacial increase of moist and cool climatic conditions. A comparable increase in Podocarpus is found in other lowland records in Amazonia. A review of published pollen data from Amazonia suggests that the moisture source was from the southeast. By contrast, present-day moisture comes from the tropical Atlantic and from the Amazon basin, with its convective precipitation. The likely cause for the southeastern moisture source between ca. 15,000 and 14,500 cal yr B.P. was enhanced polar (Antarctic) advection that reached low latitudes and maintained year-round the meteorological equator in its austral-winter position at northern latitudes or reduced drastically its southward summer displacement. This hypothesis is consistent with marine and ice core records.Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2013-01-10T13:05:08Z No. of bitstreams: 1 Ledru.pdf: 288799 bytes, checksum: 6a5507cad5ed7f79f8f01697579a5101 (MD5)Made available in DSpace on 2013-01-10T13:05:08Z (GMT). No. of bitstreams: 1 Ledru.pdf: 288799 bytes, checksum: 6a5507cad5ed7f79f8f01697579a5101 (MD5) Previous issue date: 2001http://dx.doi.org/10.1006/qres.2000.2187reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBApalynologySouth AmericaBrazillate-glacialPodocarpusAmazoniapolar advectionmeteorological equatorLate-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern BrazilQuaternary Researchinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessORIGINALLedru.pdfLedru.pdfapplication/pdf288799https://repositorio.ufba.br/bitstream/ri/7789/1/Ledru.pdf6a5507cad5ed7f79f8f01697579a5101MD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/7789/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTLedru.pdf.txtLedru.pdf.txtExtracted texttext/plain32683https://repositorio.ufba.br/bitstream/ri/7789/3/Ledru.pdf.txt03d97a78523459b3f52234eea91caeb8MD53ri/77892022-07-05 14:03:11.559oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:11Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false |
dc.title.pt_BR.fl_str_mv |
Late-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern Brazil |
dc.title.alternative.pt_BR.fl_str_mv |
Quaternary Research |
title |
Late-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern Brazil |
spellingShingle |
Late-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern Brazil Ledru, Marie-Pierre palynology South America Brazil late-glacial Podocarpus Amazonia polar advection meteorological equator |
title_short |
Late-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern Brazil |
title_full |
Late-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern Brazil |
title_fullStr |
Late-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern Brazil |
title_full_unstemmed |
Late-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern Brazil |
title_sort |
Late-glacial cooling in Amazonia inferred from pollen at Lagoa do Caco, northern Brazil |
author |
Ledru, Marie-Pierre |
author_facet |
Ledru, Marie-Pierre Cordeiro, Renato Campello Dominguez, José Maria Landim Martin, Louis Mourguiart, Philippe Sifeddine, Abdelfetah Turcq, Bruno |
author_role |
author |
author2 |
Cordeiro, Renato Campello Dominguez, José Maria Landim Martin, Louis Mourguiart, Philippe Sifeddine, Abdelfetah Turcq, Bruno |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Ledru, Marie-Pierre Cordeiro, Renato Campello Dominguez, José Maria Landim Martin, Louis Mourguiart, Philippe Sifeddine, Abdelfetah Turcq, Bruno Ledru, Marie-Pierre Cordeiro, Renato Campello Dominguez, José Maria Landim Martin, Louis Mourguiart, Philippe Sifeddine, Abdelfetah Turcq, Bruno |
dc.subject.por.fl_str_mv |
palynology South America Brazil late-glacial Podocarpus Amazonia polar advection meteorological equator |
topic |
palynology South America Brazil late-glacial Podocarpus Amazonia polar advection meteorological equator |
description |
Texto completo: acesso restrito. p.47–56 |
publishDate |
2001 |
dc.date.issued.fl_str_mv |
2001 |
dc.date.accessioned.fl_str_mv |
2013-01-10T13:05:08Z |
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/7789 |
dc.identifier.issn.none.fl_str_mv |
0033-5894 |
dc.identifier.number.pt_BR.fl_str_mv |
v. 55, n.1 |
identifier_str_mv |
0033-5894 v. 55, n.1 |
url |
http://www.repositorio.ufba.br/ri/handle/ri/7789 |
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eng |
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eng |
dc.rights.driver.fl_str_mv |
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