DOI: 10.1016/j.quascirev.2017.06.014
论文题名: Trace metal evidence for a poorly ventilated glacial Southern Ocean
作者: Wagner M. ; Hendy I.L.
刊名: Quaternary Science Reviews
出版年: 2017
卷: 170 起始页码: 109
结束页码: 120
语种: 英语
英文关键词: Glacial
; Redox
; Southern Ocean
; Trace metals
Scopus关键词: Cadmium
; Carbon dioxide
; Glacial geology
; Metals
; Molybdenum
; Oceanography
; Oxygen
; Oxygenation
; Rhenium
; Glacial
; Ocean circulation
; Oxygen concentrations
; Oxygen minimum zone
; Redox
; Southern ocean
; Spatial heterogeneity
; Trace metal
; Trace elements
; carbon dioxide
; carbon isotope
; carbon sequestration
; deep water ventilation
; deglaciation
; glacial hydrology
; marine sediment
; nutrient enrichment
; oxygen minimum layer
; oxygenation
; redox conditions
; trace metal
; water chemistry
; Atlantic Ocean
; Atlantic Sector
; Cape Basin
; Southern Ocean
; Southern Ocean
英文摘要: Glacial benthic δ13C and Δ14C measurements from the Atlantic Ocean have been interpreted to indicate the existence of a poorly ventilated Southern Ocean with greater CO2 and nutrient contents compared to present. Enhanced storage of CO2 in the deep ocean predicts that oxygen concentrations should have declined at the same time—a prediction increasingly supported by evidence for oxygen depletion in the glacial Southern Ocean. Here we take a novel approach by using a suite of redox-sensitive trace metals (Ag, Cd, Re and Mo) to show that Southern Ocean sediments from two cores in the Atlantic sector were suboxic during and prior to deglaciation, implying changes to ocean circulation and/or elevated export production that significantly altered deep water chemistry. In the Cape Basin, enrichments of the authigenically deposited trace metal Re are comparable to those found in oxygen minimum zones, pointing to substantial decreases in oxygenation. Furthermore, trace metal results suggest potential spatial heterogeneity in the glacial Southern Ocean, and a more complicated oceanographic and oxygenation history than has previously been assumed. © 2017 资助项目: Hendy, I.L.
; Department of Earth and Environmental Sciences, University of Michigan, 1100 N. University Ave. Ann Arbor, United States
; 电子邮件: ihendy@umich.edu
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59158
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Environmental Sciences, University of Michigan, 1100 N. University Ave. Ann ArborMI, United States; School for Environment and Sustainability, University of Michigan, 440 Church St., Ann Arbor, MI, United States
Recommended Citation:
Wagner M.,Hendy I.L.. Trace metal evidence for a poorly ventilated glacial Southern Ocean[J]. Quaternary Science Reviews,2017-01-01,170