气候变化领域集成服务门户(CCPortal): Surface and deep water variability in the Western Mediterranean (ODP Site 975) during insolation cycle 74: High-resolution calcareous plankton and molecular biomarker signals

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DOI	10.1016/j.palaeo.2019.109583
	Surface and deep water variability in the Western Mediterranean (ODP Site 975) during insolation cycle 74: High-resolution calcareous plankton and molecular biomarker signals
	Quivelli O.; Marino M.; Rodrigues T.; Girone A.; Maiorano P.; Abrantes F.; Salgueiro E.; Bassinot F.
发表日期	2020
ISSN	0031-0182
卷号	542
英文摘要	We reconstructed changes in productivity and surface/subsurface and deep-water dynamics in the Western Mediterranean through a multi-proxy study of Ocean Drilling Program Site 975 between late Marine Isotope Stage (MIS) 20 and early interglacial MIS 19. Our high-resolution study (down to ~200-year resolution) combines calcareous plankton assemblages (coccolithophores and foraminifera), biomarkers (C37-alkenones, n-alkanes, n-alcohols) and elemental proxies (total organic carbon, total nitrogen, calcium carbonate). Surface water conditions are derived (i) from high-resolution δ18O and δ13C records obtained from the planktonic foraminifer Globigerina bulloides, and (ii) from summer and winter, foraminifera-based sea surface temperature reconstructions (SSTJAS-foram, SSTJFM-foram) achieved through transfer function. The integration of the whole dataset makes it possible to identify in the Balearic Sea, and to accurately characterize for the first time, an Organic Rich Layer (ORL) during latest MIS 20-early MIS 19, close to i-cycle 74. Its presence is marked firstly by higher values of total nitrogen (TN) and an increase of total C37-alkenone and total organic carbon (TOC) preserved in the sediments. The multi-proxy approach reveals that the deglacial phase played a prominent role for ORL formation that was characterized by centennial scale phases. The alcohol preservation index (API) suggests that the shoaling of the circulation, which boosted marine productivity, started in the deglaciation and, in combination with freshening by Atlantic water inflow/riverine input and surface water buoyancy during sea level rising, culminated during the ORL event. At this time calcareous plankton proliferated on subsurface-surface waters, benefiting from ameliorating conditions, which promoted maximum marine productivity and higher organic matter preservation on the seafloor. © 2020 Elsevier B.V.
英文关键词	C37-alkenones; Coccolithophores; MIS 19; Organic-rich layer; Planktonic foraminifera; Terrigenous biomarkers
语种	英语
scopus关键词	biomarker; buoyancy; coccolith; data set; deglaciation; interglacial; Ocean Drilling Program; planktonic foraminifera; sea level; sea surface temperature; seafloor; total organic carbon; Balearic Sea; Mediterranean Sea; Foraminifera; Globigerina bulloides; Haptophyceae
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150601
作者单位	Dipartimento di Scienze della Terra e Geoambientali, Università degli Studi di Bari Aldo Moro, via E. Orabona 4, Bari, 70125, Italy; Divisão de Geologia e Georecursos Marinhos, Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, Lisboa, 1495-006, Portugal; Centro de Ciências do Mar (CCMAR), Universidade do Algarve, Campus de Gambelas, Faro, 8005-139, Portugal; Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Gif-sur-Yvette, 91198, France
推荐引用方式 GB/T 7714	Quivelli O.,Marino M.,Rodrigues T.,et al. Surface and deep water variability in the Western Mediterranean (ODP Site 975) during insolation cycle 74: High-resolution calcareous plankton and molecular biomarker signals[J],2020,542.
APA	Quivelli O..,Marino M..,Rodrigues T..,Girone A..,Maiorano P..,...&Bassinot F..(2020).Surface and deep water variability in the Western Mediterranean (ODP Site 975) during insolation cycle 74: High-resolution calcareous plankton and molecular biomarker signals.Palaeogeography, Palaeoclimatology, Palaeoecology,542.
MLA	Quivelli O.,et al."Surface and deep water variability in the Western Mediterranean (ODP Site 975) during insolation cycle 74: High-resolution calcareous plankton and molecular biomarker signals".Palaeogeography, Palaeoclimatology, Palaeoecology 542(2020).