DOI: 10.1002/2015GL066476
论文题名: Assessing the continuity of the blue ice climate record at Patriot Hills, Horseshoe Valley, West Antarctica
作者: Winter K. ; Woodward J. ; Dunning S.A. ; Turney C.S.M. ; Fogwill C.J. ; Hein A.S. ; Golledge N.R. ; Bingham R.G. ; Marrero S.M. ; Sugden D.E. ; Ross N.
刊名: Geophysical Research Letters
ISSN: 0094-9300
EISSN: 1944-9031
出版年: 2016
卷: 43, 期: 5 起始页码: 2019
结束页码: 2026
语种: 英语
英文关键词: Antarctica
; Blue Ice Area
; climate record
; ground-penetrating radar
; katabatic winds
; unconformities
Scopus关键词: Climate change
; Deuterium
; Geological surveys
; Ground penetrating radar systems
; Landforms
; Radar
; Surveys
; Antarctica
; Blue ice
; Climate record
; Ground Penetrating Radar
; Katabatic winds
; Unconformities
; Ice
; assessment method
; deuterium
; erosion
; ground penetrating radar
; ice sheet
; isotopic analysis
; katabatic flow
; proxy climate record
; unconformity
; Antarctica
; West Antarctica
英文摘要: We use high-resolution ground-penetrating radar (GPR) to assess the continuity of the Blue Ice Area (BIA) horizontal climate record at Patriot Hills, Horseshoe Valley, West Antarctica. The sequence contains three pronounced changes in deuterium isotopic values at ~18 cal ka, ~12 cal ka, and ~8 cal ka. GPR surveys along the climate sequence reveal continuous, conformable dipping isochrones, separated by two unconformities in the isochrone layers, which correlate with the two older deuterium shifts. We interpret these unconformities as discontinuities in the sequence, rather than direct measures of climate change. Ice sheet models and Internal Layer Continuity Index plots suggest that the unconformities represent periods of erosion occurring, as the former ice surface was scoured by katabatic winds in front of mountains at the head of Horseshoe Valley. This study demonstrates the importance of high-resolution GPR surveys for investigating both paleoflow dynamics and interpreting BIA climate records. © 2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977851952&doi=10.1002%2f2015GL066476&partnerID=40&md5=2657135ac1d2eef0860911cc046fd608
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10263
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Geography, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, United Kingdom
Recommended Citation:
Winter K.,Woodward J.,Dunning S.A.,et al. Assessing the continuity of the blue ice climate record at Patriot Hills, Horseshoe Valley, West Antarctica[J]. Geophysical Research Letters,2016-01-01,43(5).