DOI: 10.1016/j.quascirev.2013.09.008
Scopus记录号: 2-s2.0-84900464695
论文题名: Using relative sea-level data to constrain the deglacial and Holocene history of southern Greenland
作者: Woodroffe S.A. ; Long A.J. ; Lecavalier B.S. ; Milne G.A. ; Bryant C.L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 92 起始页码: 345
结束页码: 356
语种: 英语
英文关键词: Deglaciation
; Geophysical model
; Greenland Ice Sheet
; Isolation basin
; Relative sea level
; Southern Greenland
Scopus关键词: Glaciers
; Sea level
; Deglaciations
; Geophysical modeling
; Greenland
; Greenland Ice Sheet
; Isolation basin
; Relative sea level
; Glacial geology
; climate forcing
; data set
; deglaciation
; geophysical method
; Holocene
; ice retreat
; ice sheet
; lowstand
; paleoceanography
; sea level change
; uplift
; Arctic
; Greenland
; Paamiut
; Sisimiut Harbour
; West Greenland
英文摘要: This paper presents new Holocene relative sea-level (RSL) data collected from isolation basins close to the town of Paamiut in south west Greenland. The data shows a rapid fall from a marine limit of c. 52masl at c. 10.9cal.ka BP to close to present by c. 9.5cal.ka BP, at rates of up to c. 32mm/yr, falling below present for the majority of the Holocene before rising to present in the last 2000 years. The elevation of the RSL lowstand is not well constrained, but was at least below-3m. This pattern of rapid RSL fall during the early Holocene matches the pattern seen at other southern Greenland locations suggesting rapid, largely simultaneous ice retreat from the area surrounding the Qassimiut Lobe at the start of the Holocene, occurring c. 2000 years after the initial deglaciation of the extreme southern tip of Greenland. The RSL histories from this and other southern Greenland locations are distinct to those recorded further north along the west coast, and are in broad agreement with a pattern of vertical land motion and RSL predicted by the Huy2 model (Simpson etal., 2009), which predicts an 80m drop in the contribution of vertical land motion to RSL at 10cal.ka BP between Sisimiut and Paamiut on the west coast. Despite this broad-scale spatial agreement between the RSL data and the Huy2 model, it fails to satisfactorily predict the Holocene RSL histories at Paamiut and other southern Greenland locations. Sensitivity tests indicate that the data-model misfits are most likely due to an over-estimate of the forcing during the Holocene Thermal Maximum (or the response to this forcing) in southern Greenland and error in the North American ice sheets component of the background deglaciation model. Our new data suggests that much of the southern part of the ice sheet acted differently to the area further north. However RSL changes at Paamiut are also largely impacted by regional and larger-scale processes including a bulls-eye of uplift centred on the west, the impact of the Holocene Thermal Maximum and the influence of the collapse of the North American ice sheets. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60289
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geography, Durham University Science Laboratories, South Road, Durham DH1 3LE, United Kingdom; Department of Physics, University of Ottawa, MacDonald Hall, Ottawa, K1N 6N5, Canada; Department of Earth Sciences, University of Ottawa, Marrion Hall, Ottawa K1N 6N5, Canada; NERC Radiocarbon Laboratory, Scottish Enterprise Technology Park, Rankine Avenue, East Kilbride, Glasgow G75 0QF, United Kingdom
Recommended Citation:
Woodroffe S.A.,Long A.J.,Lecavalier B.S.,et al. Using relative sea-level data to constrain the deglacial and Holocene history of southern Greenland[J]. Quaternary Science Reviews,2014-01-01,92