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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A mid-Holocene climate reconstruction for eastern South America

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Author(s):
Prado, L. F. [1] ; Wainer, I. [1] ; Chiessi, C. M. [2] ; Ledru, M-P [3] ; Turcq, B. [4]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Oceanog, Sao Paulo - Brazil
[2] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Sao Paulo - Brazil
[3] UM2, CNRS, IRD, Inst Sci Evolut, UMR 226, Montpellier - France
[4] IRD, UMR 7159, Lab Oceanog & Climat Experimentat & Approches Num, Bondy - France
Total Affiliations: 4
Document type: Journal article
Source: Climate of the Past; v. 9, n. 5, p. 2117-2133, 2013.
Web of Science Citations: 33
Abstract

The mid-Holocene (6000 calibrated years before present) is a key period in palaeoclimatology because incoming summer insolation was lower than during the late Holocene in the Southern Hemisphere, whereas the opposite happened in the Northern Hemisphere. However, the effects of the decreased austral summer insolation over South American climate have been poorly discussed by palaeodata syntheses. In addition, only a few of the regional studies have characterised the mid-Holocene climate in South America through a multiproxy approach. Here, we present a multiproxy compilation of mid-Holocene palaeoclimate data for eastern South America. We compiled 120 palaeoclimatological datasets, which were published in 84 different papers. The palaeodata analysed here suggest a water deficit scenario in the majority of eastern South America during the mid-Holocene if compared to the late Holocene, with the exception of northeastern Brazil. Low mid-Holocene austral summer insolation caused a reduced land-sea temperature contrast and hence a weakened South American monsoon system circulation. This scenario is represented by a decrease in precipitation over the South Atlantic Convergence Zone area, saltier conditions along the South American continental margin, and lower lake levels. (AU)

FAPESP's process: 12/17517-3 - Response of the Western Atlantic Ocean to changes in the Atlantic meridional overturning circulation: from millennial to seasonal variability
Grantee:Cristiano Mazur Chiessi
Support Opportunities: Research Program on Global Climate Change - Young Investigators
FAPESP's process: 10/09983-9 - Sea surface temperature changes in the western South Atlantic and precipitation variability in southeastern South America since the Last Glacial Maximum
Grantee:Cristiano Mazur Chiessi
Support Opportunities: Regular Research Grants
FAPESP's process: 11/06610-0 - Air-sea interaction in Southern Atlantic and the water paleocycle in eastern subtropical South America during Holocene
Grantee:Luciana Figueiredo Prado
Support Opportunities: Scholarships in Brazil - Doctorate