Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.marmicro.2011.01.004 |
Paleoceanography of the Mauritanian margin during the last two climatic cycles: From planktonic foraminifera to African climate dynamics | |
Matsuzaki, K. M. R.1; Eynaud, F.1; Malaize, B.1; Grousset, F. E.1,2; Tisserand, A.1; Rossignol, L.1; Charlier, K.1; Jullien, E.1 | |
通讯作者 | Eynaud, F. |
来源期刊 | MARINE MICROPALEONTOLOGY
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ISSN | 0377-8398 |
EISSN | 1872-6186 |
出版年 | 2011 |
卷号 | 79期号:3-4页码:67-79 |
英文摘要 | The last 220 ka of the MD03-2705 (18 degrees 05.81’ N-21 degrees 09.19’ W) sedimentary sequence, retrieved off the Cape Verde islands, was investigated using a multiproxy approach. Planktonic foraminifera assemblage analyses, coupled with isotopic measurements (delta O-18) from benthic (Planulina wuellerstorfi) and planktonic (Globigerinoides ruber) foraminifera monospecific samples were conducted along the topmost 11 m of the sequence. High resolution X-ray fluorescence measurements (0.5 cm resolution), giving access to major element ratio, have completed the geochemical analyses along the core. Seasonal and annual past sea surface temperatures (SST) were quantitatively reconstructed. Local sea-surface salinity (SSS) changes were then estimated by coupling SST with planktonic delta O-18 data. Our data provide a set of both oceanic and continental markers of environmental changes along the north-western African margin. The major changes detected in our record are discussed in the light of the regional paleoceanographic and paleoclimatic history of the last 220 ka. Coupled oceanographic and atmospheric processes portray the climatic evolution of the area, and show strong links among the regional oceanography (water mass advection), the upwelling dynamics and the Intertropical Convergence Zone (ITCZ) migration. An increased upwelling activity (or influence of upwelling filaments) is noted at the end of the two last glacial periods, probably in response to a more southerly position of the ITCZ. Higher SSS are recorded over the area during arid intervals and were tentatively interpreted as signing a southward shift of the Cape Verde Frontal Zone. A detailed coupling between dust advection and SSS values over the site of study was noted during MIS6.5. (C) 2011 Elsevier B.V. All rights reserved. |
英文关键词 | NW African margin Planktonic foraminifera Sea-surface salinity African monsoons Late Pleistocene |
类型 | Article |
语种 | 英语 |
国家 | France |
收录类别 | SCI-E |
WOS记录号 | WOS:000291415700001 |
WOS关键词 | SEA-SURFACE TEMPERATURES ; NORTHWEST AFRICA ; CANARY-ISLANDS ; ISOTOPIC COMPOSITION ; OCEAN PRODUCTIVITY ; CONTINENTAL-MARGIN ; NORTHEAST ATLANTIC ; WATER TEMPERATURE ; DEEP-SEA ; PALEOSALINITY |
WOS类目 | Paleontology |
WOS研究方向 | Paleontology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/169620 |
作者单位 | 1.Univ Bordeaux 1, Lab EPOC UMR CNRS 5805, F-33405 Talence, France; 2.Observ Aquitain Sci Univers, Floirac, France |
推荐引用方式 GB/T 7714 | Matsuzaki, K. M. R.,Eynaud, F.,Malaize, B.,et al. Paleoceanography of the Mauritanian margin during the last two climatic cycles: From planktonic foraminifera to African climate dynamics[J],2011,79(3-4):67-79. |
APA | Matsuzaki, K. M. R..,Eynaud, F..,Malaize, B..,Grousset, F. E..,Tisserand, A..,...&Jullien, E..(2011).Paleoceanography of the Mauritanian margin during the last two climatic cycles: From planktonic foraminifera to African climate dynamics.MARINE MICROPALEONTOLOGY,79(3-4),67-79. |
MLA | Matsuzaki, K. M. R.,et al."Paleoceanography of the Mauritanian margin during the last two climatic cycles: From planktonic foraminifera to African climate dynamics".MARINE MICROPALEONTOLOGY 79.3-4(2011):67-79. |
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