DOI: 10.1016/j.gloplacha.2015.12.020
论文题名: Rapid early Holocene sea-level rise in Prydz Bay, East Antarctica
作者: Hodgson D.A. ; Whitehouse P.L. ; De Cort G. ; Berg S. ; Verleyen E. ; Tavernier I. ; Roberts S.J. ; Vyverman W. ; Sabbe K. ; O'Brien P.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2016
卷: 139 起始页码: 128
结束页码: 140
语种: 英语
英文关键词: Deglaciation
; East antarctic ice sheet
; Lambert glacier
; Prydz bay
; Sea level rise
Scopus关键词: Bathymetry
; Curve fitting
; Geology
; Glacial geology
; Glaciers
; Hydrographic surveys
; Ice
; Deglaciations
; East antarctic ice sheets
; Glacial isostatic adjustment models
; Last Glacial Maximum
; Prydz bay
; Relative sea level rise
; Relative sea-level changes
; Sea level rise
; Sea level
; deglaciation
; Holocene
; ice retreat
; ice sheet
; Last Glacial Maximum
; radiocarbon dating
; sea level change
; seafloor
; Antarctic Ice Sheet
; Antarctica
; East Antarctic Ice Sheet
; East Antarctica
; Larsemann Hills
; Prydz Bay
; Rauer Islands
; Vestfold Hills
; Spheniscidae
英文摘要: Prydz Bay is one of the largest embayments on the East Antarctic coast and it is the discharge point for approximately 16% of the East Antarctic Ice Sheet. Geological constraints on the regional ice sheet history include evidence of past relative sea-level change at three sites; the Vestfold Hills, Rauer Islands and Larsemann Hills. In this paper we compile updated regional relative sea-level data from these sites. We compare these with a suite of relative sea-level predictions derived from glacial isostatic adjustment models and discuss the significance of departures between the models and the field evidence. The compiled geological data extend the relative sea-level curve for this region to 11,258 cal yr BP and include new constraints based on abandoned penguin colonies, new isolation basin data in the Vestfold Hills, validation of a submarine relative sea-level constraint in the Rauer Islands and recalibrated radiocarbon ages at all sites dating from 12,728 cal yr BP. The field data show rapid increases in rates of relative sea level rise of 12-48 mm/yr between 10,473 (or 9678) and 9411 cal yr BP in the Vestfold Hills and of 8.8 mm/yr between 8882 and 8563 cal yr BP in the Larsemann Hills. The relative sea-level high stands of ≥. 8.8 m from 9411 to after 7564 cal yr BP (Vestfold Hills) and ≥. 8 m at 8563 and 7066 cal yr BP (Larsemann Hills) are over-predicted by some of the glacial isostatic adjustment models considered here, suggesting that assumptions relating to the magnitude and timing of regional ice loss since the Last Glacial Maximum may need revising. In the Vestfold Hills and Rauer Islands the final deglacial sea-level rise was almost exactly cancelled out by local rebound between 9411 and 5967 cal yr BP and this was followed by a near exponential decay in relative sea-level. In the Larsemann Hills the sea-level data suggest that the rate of ice retreat in this region was not uniform throughout the Holocene. Swath bathymetric surveys of the benthic seafloor topography show the presence of multiple offshore basins. These are a priority for further study as those that remained free of grounded ice should provide precise constraints on relative sea-level rise and ice sheet history during the most rapid phases of the last major deglaciation. © 2016 The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957105341&doi=10.1016%2fj.gloplacha.2015.12.020&partnerID=40&md5=a38e7c088316bd25173e97f1a5556a55
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11698
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
There are no files associated with this item.
作者单位: British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge, United Kingdom
Recommended Citation:
Hodgson D.A.,Whitehouse P.L.,De Cort G.,et al. Rapid early Holocene sea-level rise in Prydz Bay, East Antarctica[J]. Global and Planetary Change,2016-01-01,139.