globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.07.019
论文题名:
South Tropical Atlantic anti-phase response to Holocene Bond Events
作者: Evangelista H.; Gurgel M.; Sifeddine A.; Rigozo N.R.; Boussafir M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 415
起始页码: 21
结束页码: 27
语种: 英语
英文关键词: Alkenone ; Atlantic overturning ; Bond cycles ; Holocene ; South Atlantic
英文摘要: Records of the climatic impacts of the North Atlantic Bond cycles over the subtropical Southern Hemisphere remain scarce, and their mechanism is a topic of active discussion. We present here an alkenone-based reconstructed sea surface temperature (SST) of a sediment core retrieved from the Brazilian Southwestern Tropical Atlantic (SWTA), Rio de Janeiro, together with a sediment SST record from the Cariaco Basin. The sediment cores span the period 2,100. B.P. - 11,100. B.P. Morlet-wavelet analysis detected marked periodic signals of ~. 0.8, ~. 1.7 and ~. 2.2. kyr, very similar and with comparable phases to the hematite-stained-grain time series from the Northern North Atlantic in which the cyclic pattern was recognized as Bond cycles. Our result corroborates the modeled surface ocean anti-phase thermal relation between the North and the South Atlantic. We attribute this behavior to the slowing of the Atlantic Meridional Overturning Circulation. The relative SST warming at Rio de Janeiro and the relative cooling at Cariaco were comparatively more pronounced during the early Holocene (from 11 to 5. kyr B.P.) than in more recent time. © 2014 Elsevier B.V. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69168
Appears in Collections:过去全球变化的重建

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作者单位: LARAMG - Lab. de Radioecologia e Mudanças Globais/DBB/IBRAG/Uni. do Estado do Rio de Janeiro, Pavilhão Haroldo L. Cunha, Subsolo, Rua São Francisco Xavier, 524, Maracanã, Rio de Janeiro, RJ, Brazil; Departamento de Geoquimica, Universidade Federal Fluminense, Departamento de Geoquímica/IQ, Morro de Valongunho S/n, 5 Andar, Centro, Niterói, RJ, Brazil; IRD-LOCEAN (UMR 7159 IRD/CNRS/UPMC/MNHN)-Institut Pierre-Simon Laplace, Bondy, France; Centro Regional Sul de Pesquisas Espaciais/INPE Campus Universitário - UFSM, Caixa Postal no. 5021, Santa Maria, RS, Brazil; School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, Brazil; Av. Arlindo Bettio, 1000, São Paulo, SP, Brazil

Recommended Citation:
Evangelista H.,Gurgel M.,Sifeddine A.,et al. South Tropical Atlantic anti-phase response to Holocene Bond Events[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,415
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