DOI: 10.1016/j.quascirev.2013.12.022
Scopus记录号: 2-s2.0-84893095454
论文题名: The sea-level fingerprints of ice-sheet collapse during interglacial periods
作者: Hay C. ; Mitrovica J.X. ; Gomez N. ; Creveling J.R. ; Austermann J. ; Kopp E.R.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 87 起始页码: 60
结束页码: 69
语种: 英语
英文关键词: Fingerprinting
; Ice sheets
; Interglacials
; Sea level
; Sea-level highstands
Scopus关键词: East antarctic ice sheets
; Fingerprinting
; Global climate changes
; Ice sheet
; Interglacial periods
; Interglacials
; Sea-level highstands
; West antarctic ice sheets
; Climate change
; Glacial geology
; Glaciers
; Isotopes
; Melting
; Sea level
; climate variation
; global climate
; ice sheet
; interglacial
; paleoclimate
; Pleistocene
; sea level change
; Antarctic Ice Sheet
; Antarctica
; Arctic
; Greenland
; Greenland Ice Sheet
; West Antarctic Ice Sheet
; West Antarctica
英文摘要: Studies of sea level during previous interglacials provide insight into the stability of polar ice sheets in the face of global climate change. Commonly, these studies correct ancient sea-level highstands for the contaminating effect of isostatic adjustment associated with past ice age cycles, and interpret the residuals as being equivalent to the peak eustatic sea level associated with excess melting, relative to present day, of ancient polar ice sheets. However, the collapse of polar ice sheets produces a distinct geometry, or fingerprint, of sea-level change, which must be accounted for to accurately infer peak eustatic sea level from site-specific residual highstands. To explore this issue, we compute fingerprints associated with the collapse of the Greenland Ice Sheet, West Antarctic Ice Sheet, and marine sectors of the East Antarctic Ice Sheet in order to isolate regions that would have been subject to greater-than-eustatic sea-level change for all three cases. These fingerprints are more robust than those associated with modern melting events, when applied to infer eustatic sea level, because: (1) a significant collapse of polar ice sheets reduces the sensitivity of the computed fingerprints to uncertainties in the geometry of the melt regions; and (2) the sea-level signal associated with the collapse will dominate the signal from steric effects. We evaluate these fingerprints at a suite of sites where sea-level records from interglacial marine isotopes stages (MIS) 5e and 11 have been obtained. Using these results, we demonstrate that previously discrepant estimates of peak eustatic sea level during MIS5e based on sea-level markers in Australia and the Seychelles are brought into closer accord. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60368
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Planetary Sciences, Harvard University, United States; Division of Geological and oPlanetary Sciences, California Institute of Technology, United States; Department of Earth and Planetary Sciences and Rutgers Energy Institute, Rutgers University, United States
Recommended Citation:
Hay C.,Mitrovica J.X.,Gomez N.,et al. The sea-level fingerprints of ice-sheet collapse during interglacial periods[J]. Quaternary Science Reviews,2014-01-01,87