DOI: 10.1016/j.quascirev.2018.04.011
Scopus记录号: 2-s2.0-85046019550
论文题名: Late Quaternary deglacial history across the Larsen B embayment, Antarctica
作者: Jeong A. ; Lee J.I. ; Seong Y.B. ; Balco G. ; Yoo K.-C. ; Yoon H.I. ; Domack E. ; Rhee H.H. ; Yu B.Y.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 189 起始页码: 134
结束页码: 148
语种: 英语
英文关键词: Antarctica
; Cosmogenic isotopes
; Deglaciation
; Glacial geomorphology
; Glaciation
; In-situ 14C
; Larsen ice shelf
; Meteoric 10Be
; Quaternary
Scopus关键词: Climate change
; Deposits
; Geochronology
; Glacial geology
; Submarine geology
; Antarctica
; Cosmogenic isotopes
; Deglaciations
; Glacial geomorphology
; Glaciation
; Ice shelves
; Meteoric^10Be
; Quaternary
; Ice
; carbon isotope
; climate variation
; cosmogenic radionuclide
; deglaciation
; glacial deposit
; glaciation
; Holocene
; ice shelf
; in situ measurement
; Last Glacial Maximum
; marine sediment
; Quaternary
; seafloor
; sediment core
; subglacial deposit
; Antarctic Peninsula
; Antarctica
; Larsen Ice Shelf
; West Antarctica
英文摘要: We measured meteoric 10Be variation throughout a marine sediment core from the Larsen B embayment (LBE) of the Antarctic Peninsula, and collected in situ 10Be and 14C exposure ages on terrestrial glacial deposits from the northern and southern margins of the LBE. We use these data to reconstruct Last Glacial Maximum (LGM) to present deglaciation and ice shelf change in the LBE. Core sedimentary facies and meteoric 10Be data show a monotonic progression from subglacial deposits to sub-ice-shelf deposits to open-marine conditions, indicating that its collapse in 2002 was unprecedented since the LGM. Exposure-age data from the southern LBE indicate 40 m of ice surface lowering between 14 and 6 ka, then little change between 6 ka and the 2002 collapse. Exposure-age data from the northern LBE show a bimodal distribution in which clusters of apparent exposure ages in the ranges 4.9–5.1 ka and 1.0–2.0 ka coexist near 50 m elevation. Based on these results, other published terrestrial and marine deglaciation ages, and a compilation of sea bed imagery, we suggest a north-to-south progression of deglaciation in the northeast Antarctic Peninsula in response to Holocene atmospheric and oceanic warming. We argue that local topography and ice configuration inherited from the LGM, in addition to climate change, are important in controlling the deglaciation history in this region. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112200
Appears in Collections: 气候减缓与适应
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作者单位: School of Geographical Sciences and Urban Planning, Arizona State University, Tempe, AZ 85287, United States; Korea Polar Research Institute, Incheon, 21990, South Korea; Department of Geography, Korea University, Seoul, 02841, South Korea; Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, United States; College of Marine Science, University of South Florida, 140 7th Avenue South, St. Petersburg, FL 33701, United States; AMS Laboratory, Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
Recommended Citation:
Jeong A.,Lee J.I.,Seong Y.B.,et al. Late Quaternary deglacial history across the Larsen B embayment, Antarctica[J]. Quaternary Science Reviews,2018-01-01,189