气候变化领域集成服务门户(CCPortal): Major hydrological shifts in the Black Sea “Lake” in response to ice sheet collapses during MIS 6 (130

CCPortal

DOI	10.1016/j.quascirev.2019.07.008
	Major hydrological shifts in the Black Sea “Lake” in response to ice sheet collapses during MIS 6 (130–184 ka BP)
	Wegwerth A.; Dellwig O.; Wulf S.; Plessen B.; Kleinhanns I.C.; Nowaczyk N.R.; Jiabo L.; Arz H.W.
发表日期	2019
ISSN	0277-3791
起始页码	126
结束页码	144
卷号	219
英文摘要	The Saalian was one of the largest glaciations during the Quaternary with an ice sheet extending considerably wider into the Eurasian continent than during other glacials. Orbital variations caused the ice sheet to switch between growing and shrinking. The partial retreat of the ice sheet and meltwater discharge resulted in global sea-level rise and increased lake levels of inland seas with broader environmental implications. During Marine Isotope Stage 6 (MIS 6), meltwater entered the formerly enclosed Black Sea at least twice as documented in a δ18O record from Anatolian speleothems. Here we present a sedimentary record from the Black Sea “Lake” covering MIS 6 and provide evidence for three meltwater periods coinciding with insolation maxima (BSWP-6-1: 180-167 ka BP, BSWP-6-2: 160-145 ka BP, BSWP-II: 133-130 ka BP). While δ18Oostracods and Sr/Caostracods point to pronounced meltwater supply and decreasing salinity, 87Sr/86Srostracods shed light on meltwater sources and pathways. During all three periods, meltwater drained most likely via the Dnieper and Volga into the Black and Caspian Seas and connected both basins. Relatively low 87Sr/86Srostracods values during the oldest meltwater period suggest melting solely of the eastern Eurasian Ice Sheet. In contrast, during the younger meltwater periods, exceptional high 87Sr/86Srostracods values point towards additional meltwater from the western Eurasian Ice Sheet. A surplus from melting glaciers in the Tian Shan and Pamir Mountains that finally entered the Caspian Sea via the Amu Darya and Sry Darya probably amplified the input of high radiogenic Sr-isotope water. We also show that higher temperatures and productivity suggest Dansgaard-Oeschger-like climate variability during the first half of MIS 6. © 2019 Elsevier Ltd
英文关键词	87Sr/86Srostracods; Black Sea “Lake”; Eurasia; Meltwater; MIS 6; Palaeohydrology; Pleistocene; Radiogenic isotopes; Saalian glaciation; Tephra; δ18Oostracods
语种	英语
scopus关键词	Glacial geology; Glaciers; Isotopes; Lakes; Melting; Sea level; Black sea; Eurasia; Meltwater; Palaeohydrology; Pleistocene; Radiogenic isotopes; Saalian glaciation; Tephra; ^87Sr/^86Srostracods; Ice; discharge; hydrology; ice sheet; marine isotope stage; meltwater; ostracod; radionuclide; Saalian; sedimentary rock; speleothem; Black 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/151826
作者单位	Leibniz Institute for Baltic Sea Research Warnemünde (IOW), Marine Geology, Rostock, Germany; Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section Climate Dynamics and Landscape Evolution, Potsdam, Germany; Department of Geography, University of Portsmouth, Portsmouth, United Kingdom; Isotope Geochemistry, Department of Earth Sciences, University of Tübingen, Germany
推荐引用方式 GB/T 7714	Wegwerth A.,Dellwig O.,Wulf S.,等. Major hydrological shifts in the Black Sea “Lake” in response to ice sheet collapses during MIS 6 (130–184 ka BP)[J],2019,219.
APA	Wegwerth A..,Dellwig O..,Wulf S..,Plessen B..,Kleinhanns I.C..,...&Arz H.W..(2019).Major hydrological shifts in the Black Sea “Lake” in response to ice sheet collapses during MIS 6 (130–184 ka BP).Quaternary Science Reviews,219.
MLA	Wegwerth A.,et al."Major hydrological shifts in the Black Sea “Lake” in response to ice sheet collapses during MIS 6 (130–184 ka BP)".Quaternary Science Reviews 219(2019).