DOI: 10.1038/ngeo2616
论文题名: Sea-level constraints on the amplitude and source distribution of Meltwater Pulse 1A
作者: Liu J. ; Milne G.A. ; Kopp R.E. ; Clark P.U. ; Shennan I.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期: 2 起始页码: 130
结束页码: 134
语种: 英语
Scopus关键词: amplitude
; climate variation
; glacier retreat
; glacioisostasy
; ice sheet
; last deglaciation
; meltwater
; reconstruction
; sea level change
; tropical region
; Antarctica
; Barbados
; North America
; Pacific Ocean
; Society Islands
; South China Sea
; Sunda Shelf
; Tahiti
; Windward Islands [Society Islands]
英文摘要: During the last deglaciation, sea levels rose as ice sheets retreated. This climate transition was punctuated by periods of more intense melting; the largest and most rapid of these-Meltwater Pulse 1A-occurred about 14,500 years ago, with rates of sea-level rise reaching approximately 4 m per century. Such rates of rise suggest ice-sheet instability, but the meltwater sources are poorly constrained, thus limiting our understanding of the causes and impacts of the event. In particular, geophysical modelling studies constrained by tropical sea-level records suggest an Antarctic contribution of more than seven metres, whereas most reconstructions from Antarctica indicate no substantial change in ice-sheet volume around the time of Meltwater Pulse 1A. Here we use a glacial isostatic adjustment model to reinterpret tropical sea-level reconstructions from Barbados, the Sunda Shelf and Tahiti. According to our results, global mean sea-level rise during Meltwater Pulse 1A was between 8.6 and 14.6 m (95% probability). As for the melt partitioning, we find an allowable contribution from Antarctica of either 4.1 to 10.0 m or 0 to 6.9 m (95% probability), using two recent estimates of the contribution from the North American ice sheets. We conclude that with current geologic constraints, the method applied here is unable to support or refute the possibility of a significant Antarctic contribution to Meltwater Pulse 1A. © 2016 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106074
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Earth and Environmental Sciences, University of Ottawa, Ottawa, ON, Canada; Department of Earth and Planetary Sciences, Rutgers Energy Institute, Rutgers University, New Brunswick, NJ, United States; College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Department of Geography, Durham University, Durham, County Durham, United Kingdom
Recommended Citation:
Liu J.,Milne G.A.,Kopp R.E.,et al. Sea-level constraints on the amplitude and source distribution of Meltwater Pulse 1A[J]. Nature Geoscience,2016-01-01,9(2)