气候变化领域集成服务门户(CCPortal): Multi-proxy speleothem record of climate instability during the early last interglacial in southern Turkey

CCPortal

DOI	10.1016/j.palaeo.2019.109422
	Multi-proxy speleothem record of climate instability during the early last interglacial in southern Turkey
	Rowe P.J.; Wickens L.B.; Sahy D.; Marca A.D.; Peckover E.; Noble S.; Özkul M.; Baykara M.O.; Millar I.L.; Andrews J.E.
发表日期	2020
ISSN	0031-0182
卷号	538
英文摘要	A stalagmite from Dim Cave in southern Turkey contains a climate record documenting rapid and significant changes in amounts of precipitation between ~132 ka and ~128 ka, during the penultimate glacial – interglacial transition. Some U–Th dates have been compromised by carbonate dissolution but rigorous selection and tuning to δ18O records from other speleothems has generated a robust age model. Growth rate was initially very slow but a rapid increase at ~129 ka was accompanied by strong negative trends in δ18O and δ13C, a combination implying the onset of much wetter conditions. Isotopic values at ~129 ka suggest that groundwater recharge rates and biogenic activity in the soil zone exceeded those of the early Holocene. A significant isotopic enrichment event at ~128 ka, during which there was alternating aragonite and calcite deposition, documents a strong drying event with a duration of ~200 years. A concurrent decrease in 87Sr/86Sr ratios indicates increased groundwater residence times and the cumulative evidence suggests amounts of rainfall fell from well above to slightly below present-day levels. Similar δ18O enrichment events are present in coeval speleothem records from southwest France and the Northern Alps, and these, together with pollen evidence from Italy, Greece and the Iberian margin of drier conditions at this time, imply that a climate anomaly extended across the northern Mediterranean borderlands. The timing, duration and structure of this episode are consistent with marine evidence of strong North Atlantic cooling early in the last interglacial and there is a resemblance to the Holocene 8.2 ka event recorded globally in many proxy-climate archives. © 2019
英文关键词	Aragonite; Climate anomaly; Mediterranean; Stable isotopes; Stalagmite; Termination II
语种	英语
scopus关键词	anomaly; aragonite; dissolution; glacial-interglacial cycle; groundwater flow; Holocene; Last Interglacial; proxy climate record; speleothem; stable isotope; stalagmite; Alps; Atlantic Ocean; Atlantic Ocean (North); France; Greece; Italy; Turkey
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/150687
作者单位	School of Environmental Sciences, University of East Anglia, Norwich, NR4 TJ, United Kingdom; Geochronology and Tracers Facility, NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, Nottingham, NG12 5GG, United Kingdom; University of Pamukkale, Department of Geology, Denizli, 20070, Turkey
推荐引用方式 GB/T 7714	Rowe P.J.,Wickens L.B.,Sahy D.,et al. Multi-proxy speleothem record of climate instability during the early last interglacial in southern Turkey[J],2020,538.
APA	Rowe P.J..,Wickens L.B..,Sahy D..,Marca A.D..,Peckover E..,...&Andrews J.E..(2020).Multi-proxy speleothem record of climate instability during the early last interglacial in southern Turkey.Palaeogeography, Palaeoclimatology, Palaeoecology,538.
MLA	Rowe P.J.,et al."Multi-proxy speleothem record of climate instability during the early last interglacial in southern Turkey".Palaeogeography, Palaeoclimatology, Palaeoecology 538(2020).