气候变化领域集成服务门户(CCPortal): Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination

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DOI	10.1016/j.quascirev.2019.106089
	Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination
	Beny F.; Bout-Roumazeilles V.; Davies G.R.; Waelbroeck C.; Bory A.; Tribovillard N.; Delattre M.; Abraham R.
发表日期	2020
ISSN	0277-3791
卷号	228
英文摘要	The past evolution of the Southern Ocean, one of the major components of the climatic system, is still a matter of debate. This study provides new insights into the deep Southern Ocean circulation based on the radiogenic isotopes and clay mineralogical signature of the terrigenous fractions transported by the main deep water masses to sediments recovered in core MD07-3076Q from the central South Atlantic. This approach successfully permits: (1) provenance identification of the various grain-size fractions (clay, cohesive silt and sortable silt); (2) assignment of each grain-size fraction to a specific water-mass; (3) reconstruction of past changes in the main deep water-mass pathways. These data document the evolution of deep-water masses in the South Atlantic Ocean during the last deglaciation. The Antarctic Bottom Water (AABW) speed and northward extension were maximum at the end of the Last Glacial Maximum (LGM), associated with strong bottom water production in the Weddell Sea, together with a vigorous Lower Circumpolar Deep Water (LCDW). In contrast the North Atlantic Deep Water (NADW) circulation was weaker than today. The onset of the deglaciation (from 17.5 ka to 15 ka, ∼Heinrich Stadial 1, HS 1) was marked by weakening and southerly retreat of the AABW and by an increase of mixing between AABW and LCDW. The speed of the AABW remained at its lowest during the Bølling Allerød (B/A) and the Younger Dryas (YD), and the LCDW slowed and retreated to the south, while the NADW progressively migrated southward, deepened, and strengthened between the beginning of the Bølling Allerød and the Holocene (from ∼15 to 10 ka). © 2019 Elsevier Ltd
英文关键词	Clay mineralogy; Grain size distribution; Last deglaciation; Paleoceanography; Radiogenic isotopes; South Atlantic; Southern Ocean
语种	英语
scopus关键词	Grain size and shape; Isotopes; Minerals; Silt; Underwater mineralogy; Clay mineralogy; Grain size distribution; Last deglaciation; Paleoceanography; Radiogenic isotopes; South Atlantic; Southern ocean; Oceanography; Allerod; Antarctic Bottom Water; Bolling; bottom water; Cam-clay model; clay mineral; deep water; grain size; Holocene; intermediate water; last deglaciation; Last Glacial Maximum; oceanic circulation; paleoceanography; reconstruction; size distribution; tectonic reconstruction; tracer; water management; water mass; Younger Dryas; Atlantic Ocean; Atlantic Ocean (North); Atlantic Ocean (South); Southern Ocean; Weddell Sea
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/151642
作者单位	Laboratoire d'Océanologie et de Géosciences, UMR 8187 CNRS/Univ Lille/ULCO, Cité scientifiqueVilleneuve d'Ascq F-59655, France; VU University Amsterdam, Department of Earth Sciences, Faculty of Science, De Boelelaan 1085, Amsterdam, 1081 HV, Netherlands; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, UMR 8212 CEA-CNRS-UVSQ, Site de l'Orme des Merisiers, Gif sur Yvette Cedex, F-91191, France
推荐引用方式 GB/T 7714	Beny F.,Bout-Roumazeilles V.,Davies G.R.,et al. Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination[J],2020,228.
APA	Beny F..,Bout-Roumazeilles V..,Davies G.R..,Waelbroeck C..,Bory A..,...&Abraham R..(2020).Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination.Quaternary Science Reviews,228.
MLA	Beny F.,et al."Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination".Quaternary Science Reviews 228(2020).