气候变化领域集成服务门户(CCPortal): Multi-proxy reconstruction of sea surface and subsurface temperatures in the western South Atlantic over the last ∼75 kyr

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DOI	10.1016/j.quascirev.2019.04.020
	Multi-proxy reconstruction of sea surface and subsurface temperatures in the western South Atlantic over the last ∼75 kyr
	Dauner A.L.L.; Mollenhauer G.; Bícego M.C.; de Souza M.M.; Nagai R.H.; Figueira R.C.L.; de Mahiques M.M.; Sousa S.H.D.M.E.; Martins C.C.
发表日期	2019
ISSN	0277-3791
起始页码	22
结束页码	34
卷号	215
英文摘要	Millennial-scale oscillations are known to be important in the climatic evolution of the Atlantic basin, but which internal processes originates these oscillations are still uncertain. In this study, we investigated how the Greenland and Antarctic climates affect the SW Atlantic through basin-wide oceanographic features (such as the NADW formation and the Agulhas leakage). We reconstructed sea surface and subsurface temperatures (SST and subT) using three lipid-based biomarker proxies (UK’ 37, TEX86 and LDI indexes) from a sediment core (NAP 63-1) retrieved from the SW Atlantic slope (24.8°S, 44.3°W). This location allowed us to evaluate the temperature oscillations of the Brazil Current without any terrigenous or upwelling-derived biases. Both TEX86-based and LDI-based estimates represent the mean annual SST, while the UK’ 37-based estimates represent the subT (around 30 m water depth). The periods with the most well-mixed water column were observed during intervals of cooling orbital trends due to the time required to transfer the surface cooling to the subsurface. The temperature reconstructions showed a general colder MIS 3 when compared to the MIS 4. They also showed evidence of a late response to deglaciation, with its onset in the SW Atlantic occurring in the middle of the Last Glacial Maximum. Based on these reconstructions, the NAP 63-1 SST orbital-scale trend seems to be linked to the Antarctic climate, influenced by local insolation changes. These temperature records also presented a clear millennial periodicity around 8 kyr. On this timescale, the millennial oscillations in the SW Atlantic's SST are likely linked to the NADW formation. © 2019 Elsevier Ltd
英文关键词	Holocene; LDI; Organic geochemistry; Paleoceanography; Pleistocene; South Atlantic; TEX86; UK’ 37
语种	英语
scopus关键词	Geochemistry; Repair; Surface waters; Holocenes; Organic geochemistry; Paleoceanography; Pleistocene; South Atlantic; TEX86; Oceanography; geochemistry; Holocene; paleoceanography; Pleistocene; proxy climate record; reconstruction; sea surface; sea surface temperature; Atlantic Ocean; Atlantic Ocean (South)
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151913
作者单位	Center for Marine Studies, Federal University of Paraná, Pontal do Paraná, PR 83255-976, Brazil; Graduate Program in Coastal and Oceanic Systems (PGSISCO) of the Federal University of Paraná, Pontal do Paraná, PR 83255-976, Brazil; Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven, D-27515, Germany; MARUM Center for Marine Environmental Sciences, University of Bremen, Bremen, D-28334, Germany; Oceanographic Institute, University of São Paulo, São Paulo, 05508-120, Brazil; Institute of Oceanography, Hamburg University, Hamburg, D-20146, Germany; Institute of Energy and Environment, University of São Paulo, São Paulo, 05508-120, Brazil
推荐引用方式 GB/T 7714	Dauner A.L.L.,Mollenhauer G.,Bícego M.C.,等. Multi-proxy reconstruction of sea surface and subsurface temperatures in the western South Atlantic over the last ∼75 kyr[J],2019,215.
APA	Dauner A.L.L..,Mollenhauer G..,Bícego M.C..,de Souza M.M..,Nagai R.H..,...&Martins C.C..(2019).Multi-proxy reconstruction of sea surface and subsurface temperatures in the western South Atlantic over the last ∼75 kyr.Quaternary Science Reviews,215.
MLA	Dauner A.L.L.,et al."Multi-proxy reconstruction of sea surface and subsurface temperatures in the western South Atlantic over the last ∼75 kyr".Quaternary Science Reviews 215(2019).