气候变化领域集成服务门户(CCPortal): Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea

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DOI	10.1016/j.quascirev.2019.106075
	Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea
	Pérez-Asensio J.N.; Frigola J.; Pena L.D.; Sierro F.J.; Reguera M.I.; Rodríguez-Tovar F.J.; Dorador J.; Asioli A.; Kuhlmann J.; Huhn K.; Cacho I.
发表日期	2020
ISSN	0277-3791
卷号	228
英文摘要	The accumulation of an Organic Rich Layer (ORL) during the last deglaciation in the Alboran Sea (western Mediterranean Sea) and its link to changes in deep and intermediate water circulation are here investigated. Benthic foraminiferal assemblages and the shallow infaunal foraminifer Uvigerina peregrina δ13C record support the establishment of sustained high organic matter fluxes, and thus eutrophic conditions at the sea floor, during the late phase of the ORL (Younger Dryas to early Holocene periods). Since organic matter fluxes were lower (mesotrophic conditions) during the Bølling-Allerød period, they cannot be solely responsible for the ORL initiation. Geochemical, sedimentological and micropalaeontological proxies support a major weakening of the deep-water convection in the Gulf of Lion as the main driver for the development of poorly-ventilated conditions from intermediate depths (946 m) to the deep western Mediterranean basin that promoted the beginning of the ORL deposition. Nevertheless, a better ventilation at intermediate depths was established during the late ORL, while the deep basin remained poorly ventilated. We propose that our data reflect the arrival of a new better-ventilated intermediate water mass analogue to the current Levantine Intermediate Water (LIW) and/or a new intermediate water mass from the Gulf of Lion. The ultimate source of this water mass needs to be further explored but chronologies of the changes recorded here indicate that intermediate and deep ventilation phases were decoupled between the western and eastern Mediterranean basins during the deglaciation and early-middle Holocene. © 2019 The Authors
英文关键词	Foraminifers; Holocene; Ichnology; Late glacial; Micropaleontology; Organic matter flux; Organic Rich Layer (ORL); Paleoceanography; Stable isotopes; Thermohaline circulation; Western Mediterranean
语种	英语
scopus关键词	Biogeochemistry; Glacial geology; Oceanography; Organic compounds; Foraminifers; Holocenes; Ichnology; Late glacial; Micropaleontology; Organic Rich Layer (ORL); Paleoceanography; Stable isotopes; Thermohaline circulations; Western Mediterranean; Ventilation; deglaciation; foraminifera; Holocene; ichnology; intermediate water; late glacial; micropaleontology; organic matter; paleoceanography; stable isotope; thermohaline circulation; Younger Dryas; Alboran Sea; Gulf of Lion; Mediterranean Sea; Foraminifera; Uvigerina peregrina
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/151638
作者单位	GRC Geociències Marines, Departament de Dinàmica de la Terra i de l'Oceà, Facultat de Ciències de la Terra, Universitat de Barcelona, Carrer Martí i Franquès s/n, Barcelona, 08028, Spain; Department of Geology, University of Salamanca, Salamanca, 37008, Spain; IGME - Geological Survey of Spain, Madrid, 28003, Spain; Departamento de Estratigrafía y Paleontología, Universidad de Granada, Fuente Nueva s/n, Granada, 18002, Spain; Department of Earth Sciences, Royal Holloway University of London, Egham, TW20 0EX, United Kingdom; CNR-ISMAR, Consiglio Nazionale delle Ricerche, Istituto di Scienze Marine, Sede Bologna, Bologna, 40129, Italy; MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
推荐引用方式 GB/T 7714	Pérez-Asensio J.N.,Frigola J.,Pena L.D.,et al. Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea[J],2020,228.
APA	Pérez-Asensio J.N..,Frigola J..,Pena L.D..,Sierro F.J..,Reguera M.I..,...&Cacho I..(2020).Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea.Quaternary Science Reviews,228.
MLA	Pérez-Asensio J.N.,et al."Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea".Quaternary Science Reviews 228(2020).