DOI: 10.1016/j.quascirev.2019.01.015
Scopus记录号: 2-s2.0-85062030168
论文题名: Southern Greenland glaciation and Western Boundary Undercurrent evolution recorded on Eirik Drift during the late Pliocene intensification of Northern Hemisphere glaciation
作者: 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.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 209 起始页码: 40
结束页码: 51
语种: 英语
英文关键词: Greenland Ice Sheet
; Ice-rafted debris
; North Atlantic
; Northern Hemisphere glaciation
; Paleoceanography
; Paleoclimatology
; Paleomagnetism
; Plio-Pleistocene transition
; Relative paleointensity
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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117355
Appears in Collections: 气候变化与战略
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Recommended Citation:
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]. Quaternary Science Reviews,2019-01-01,209