DOI: 10.1016/j.quascirev.2016.02.021
Scopus记录号: 2-s2.0-84959529249
论文题名: Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes: Insights from the Greenland ice sheet
作者: Rooney A.D. ; Selby D. ; Lloyd J.M. ; Roberts D.H. ; Lückge A. ; Sageman B.B. ; Prouty N.G.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 138 起始页码: 49
结束页码: 61
语种: 英语
英文关键词: Greenland ice sheet
; Holocene
; Ocean-ice interaction
; Osmium
Scopus关键词: Climate change
; Glacial geology
; Glaciers
; Isotopes
; Osmium
; Seawater effects
; Stratigraphy
; Weathering
; Future response
; Global settings
; Greenland Ice Sheet
; High resolution
; Holocene glacial advances
; Holocenes
; Ice interactions
; Osmium isotopes
; Ice
; chemostratigraphy
; climate change
; Holocene
; ice sheet
; ice stream
; ice-ocean interaction
; isotopic composition
; marine environment
; osmium isotope
; Pleistocene
; reconstruction
; seaweed
; Arctic
; Greenland
; Greenland Ice Sheet
; algae
英文摘要: High-resolution Os isotope stratigraphy can aid in reconstructing Pleistocene ice sheet fluctuation and elucidating the role of local and regional weathering fluxes on the marine Os residence time. This paper presents new Os isotope data from ocean cores adjacent to the West Greenland ice sheet that have excellent chronological controls. Cores MSM-520 and DA00-06 represent distal to proximal sites adjacent to two West Greenland ice streams. Core MSM-520 has a steadily decreasing Os signal over the last 10 kyr (187Os/188Os = 1.35-0.81). In contrast, Os isotopes from core DA00-06 (proximal to the calving front of Jakobshavn Isbræ) highlight four stages of ice stream retreat and advance over the past 10 kyr (187Os/188Os = 2.31; 1.68; 2.09; 1.47). Our high-resolution chemostratigraphic records provide vital benchmarks for ice-sheet modelers as we attempt to better constrain the future response of major ice sheets to climate change. Variations in Os isotope composition from sediment and macro-algae (seaweed) sourced from regional and global settings serve to emphasize the overwhelming effect weathering sources have on seawater Os isotope composition. Further, these findings demonstrate that the residence time of Os is shorter than previous estimates of ~104 yr. © 2016 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59631
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; Department of Earth Sciences, Durham University, Durham, United Kingdom; Department of Geography, Durham University, Durham, United Kingdom; Bundesanstalt für Geowissenschaften und Rohstoffe, Stilleweg 2, Hannover, Germany; Department of Earth and Planetary Sciences, Northwestern University, 1850 Campus Drive, Evanston, IL, United States; US Geological Survey, Pacific Coastal and Marine Science Center, 400 Natural Bridges Drive, Santa Cruz, CA, United States
Recommended Citation:
Rooney A.D.,Selby D.,Lloyd J.M.,et al. Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes: Insights from the Greenland ice sheet[J]. Quaternary Science Reviews,2016-01-01,138