气候变化领域集成服务门户(CCPortal): Climate variability during MIS 20–18 as recorded by alkenone-SST and calcareous plankton in the Ionian Basin (central Mediterranean)

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DOI	10.1016/j.palaeo.2020.110027
	Climate variability during MIS 20–18 as recorded by alkenone-SST and calcareous plankton in the Ionian Basin (central Mediterranean)
	Marino M.; Girone A.; Gallicchio S.; Herbert T.; Addante M.; Bazzicalupo P.; Quivelli O.; Bassinot F.; Bertini A.; Nomade S.; Ciaranfi N.; Maiorano P.
发表日期	2020
ISSN	0031-0182
卷号	560
英文摘要	This study shows the first Mediterranean high-resolution record of alkenone-derived sea surface temperature (SST) in the marine sediments outcropping at the Ideale section (IS) (southern Italy, central Mediterranean) from late marine isotope stage (MIS) 20 - through early MIS 18. The SST pattern evidences glacial-interglacial up to submillennial-scale temperature variation, with lower values (~13 °C) in late MIS 20 and substage 19b, and higher values (up to 21 °C) in MIS 19c and in the interstadials of MIS 19a. The SST data are combined with the new calcareous plankton analysis and the available, chronologically well-constrained carbon and oxygen isotope records in the IS. The multi-proxy approach, together with the location of the IS near the Italian coasts, the lower circalittoral-upper bathyal depositional setting, and high sedimentation rate allow to document long-and short-term paleoenvironmental modifications (sea level, rainfall, inorganic/organic/fresh water input to the basin), as a response to regional and global climate changes. The combined proxies reveal the occurrence of a terminal stadial event in late MIS 20 (here Med-HTIX), and warm-cold episodes (here Med-BATIX and Med-YDTIX) during Termination IX (TIX), which recall those that occurred through the last termination (TI). During these periods and the following ghost sapropel layer (insolation cycle 74, 784 ka) in the early MIS 19, high frequency internal changes are synchronously recorded by all proxies. The substage MIS 19c is warm but quite unstable, with several episodes of paleoenvironmental changes, associated with fluctuating tropical-subtropical water inflow through the Gibraltar Strait, variations of the cyclonic regime in the Ionian basin, and the southward shift of westerly winds and winter precipitation over southern Europe and Mediterranean basin. Three high-amplitude millennial-scale oscillations in the patterns of SST and calcareous plankton key taxa during MIS 19a are interpreted as linked to changes in temperature as well as in salinity due to periodical water column stratification and mixing. The main processes involved in the climate variability include changes in oceanographic exchanges through the Gibraltar Strait during modulations of Atlantic meridional overturning circulation and/or variations in atmospheric dynamics related to the influence of westerly and polar winds acting in the paleo-Ionian basin. A strong climate teleconnection between the North Atlantic and Mediterranean is discussed, and a prominent role of atmospheric processes in the central Mediterranean is evidenced by comparing data sets at the IS with Italian and extra-Mediterranean marine and terrestrial records. © 2020 Elsevier B.V.
英文关键词	Coccolithophores; Lower-Middle Pleistocene; Marine biomarkers; MIS 19; Planktonic foraminifera; Southern Italy
语种	英语
scopus关键词	alkenone; calcareous alga; carbon isotope; climate variation; glacial-interglacial cycle; marine isotope stage; meridional circulation; outcrop; oxygen isotope; paleoenvironment; precipitation (climatology); regional climate; sea surface temperature; sedimentation; teleconnection; westerly; Mediterranean Region; Foraminifera; 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/150294
作者单位	Dipartimento di Scienze della Terra e Geoambientali, University of Bari, Italy; Brown University, Providence, RI, United States; Laboratoire des Sciences du Climat et de L'Environnement, UMR8212, LSCE/IPSL, CEA-CNRS-UVSQ and Université Paris-Saclay, Gif-Sur-Yvette, France; Dipartimento di Scienze della Terra, University of Florence, Italy
推荐引用方式 GB/T 7714	Marino M.,Girone A.,Gallicchio S.,等. Climate variability during MIS 20–18 as recorded by alkenone-SST and calcareous plankton in the Ionian Basin (central Mediterranean)[J],2020,560.
APA	Marino M..,Girone A..,Gallicchio S..,Herbert T..,Addante M..,...&Maiorano P..(2020).Climate variability during MIS 20–18 as recorded by alkenone-SST and calcareous plankton in the Ionian Basin (central Mediterranean).Palaeogeography, Palaeoclimatology, Palaeoecology,560.
MLA	Marino M.,et al."Climate variability during MIS 20–18 as recorded by alkenone-SST and calcareous plankton in the Ionian Basin (central Mediterranean)".Palaeogeography, Palaeoclimatology, Palaeoecology 560(2020).