气候变化领域集成服务门户(CCPortal): Southern Greenland glaciation and Western Boundary Undercurrent evolution recorded on Eirik Drift during the late Pliocene intensification of Northern Hemisphere glaciation

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DOI	10.1016/j.quascirev.2019.01.015
	Southern Greenland glaciation and Western Boundary Undercurrent evolution recorded on Eirik Drift during the late Pliocene intensification of Northern Hemisphere glaciation
	Blake-Mizen K.; Hatfield R.G.; Stoner J.S.; Carlson A.E.; Xuan C.; Walczak M.; Lawrence K.T.; Channell J.E.T.; Bailey I.
发表日期	2019
ISSN	0277-3791
起始页码	40
结束页码	51
卷号	209
英文摘要	We present new sedimentological and environmental magnetic records spanning ∼3.2–2.2 Ma, during the intensification of Northern Hemisphere glaciation, from North Atlantic Integrated Ocean Drilling Program Site U1307 on Eirik Drift. Our new datasets and their high-fidelity age control demonstrate that while inland glaciers – and potentially also at times restricted iceberg-calving margins – have likely existed on southern Greenland since at least ∼3.2 Ma, persistent and extensive iceberg-calving glacial margins were only established in this region at 2.72 Ma, ∼300 kyr later than in northeastern and eastern Greenland. Despite a dramatic increase in Greenland-sourced ice-rafted debris deposition on Eirik Drift at this time, contemporaneous changes in the bulk magnetic properties of Site U1307 sediments, and a reduction in sediment accumulation rates, suggest a decrease in the delivery of Greenland-sourced glaciofluvial silt to our study site. We attribute these changes to a shift in depositional regime from bottom-current-dominated to glacial-IRD-dominated between ∼2.9 and 2.7 Ma, in response to a change in the depth of the flow path of the Western Boundary Undercurrent relative to our study site. © 2019 Elsevier Ltd
英文关键词	Greenland Ice Sheet; Ice-rafted debris; North Atlantic; Northern Hemisphere glaciation; Paleoceanography; Paleoclimatology; Paleomagnetism; Plio-Pleistocene transition; Relative paleointensity
语种	英语
scopus关键词	Debris; Deposition; Geomagnetism; Sea ice; Greenland Ice Sheet; Ice rafted debris; North Atlantic; Northern hemisphere glaciations; Paleoceanography; Paleoclimatology; Paleomagnetism; Plio-pleistocene; Relative paleointensity; Glacial geology; glaciation; glaciofluvial deposit; ice-rafted debris; Northern Hemisphere; Ocean Drilling Program; paleoceanography; paleoclimate; paleointensity; paleomagnetism; Pliocene-Pleistocene boundary; undercurrent; western boundary current; Arctic; Atlantic Ocean; Eirik Drift; Greenland
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/151993
作者单位	Camborne School of Mines & Environment and Sustainability Institute, University of Exeter, Penryn Campus, Treliever Road, Cornwall, TR10 9FE, United Kingdom; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, United States; Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, Southampton, SO14 3ZH, United Kingdom; Department of Geology and Environmental Geosciences, Lafayette College, EastonPA 18042, United States; Department of Geological Sciences, University of Florida, Gainesville, FL 32611, United States
推荐引用方式 GB/T 7714	Blake-Mizen K.,Hatfield R.G.,Stoner J.S.,et al. Southern Greenland glaciation and Western Boundary Undercurrent evolution recorded on Eirik Drift during the late Pliocene intensification of Northern Hemisphere glaciation[J],2019,209.
APA	Blake-Mizen K..,Hatfield R.G..,Stoner J.S..,Carlson A.E..,Xuan C..,...&Bailey I..(2019).Southern Greenland glaciation and Western Boundary Undercurrent evolution recorded on Eirik Drift during the late Pliocene intensification of Northern Hemisphere glaciation.Quaternary Science Reviews,209.
MLA	Blake-Mizen K.,et al."Southern Greenland glaciation and Western Boundary Undercurrent evolution recorded on Eirik Drift during the late Pliocene intensification of Northern Hemisphere glaciation".Quaternary Science Reviews 209(2019).