DOI: 10.1016/j.quascirev.2013.08.023
Scopus记录号: 2-s2.0-84885157782
论文题名: New perspectives on paleoglaciology
作者: Fastook J.L. ; Hughes T.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 80 起始页码: 169
结束页码: 194
语种: 英语
英文关键词: Arctic Ocean
; Glacial geology
; Glaciation cycles
; Ice sheets
; Ice shelves
; Marine geology
; Megafloods
; Quaternary Ice Age
; Sea ice
; White Hole
Scopus关键词: Arctic ocean
; Glaciation cycles
; Ice age
; Ice sheet
; Ice shelves
; Megafloods
; White Hole
; Glaciers
; Sea ice
; Submarine geology
; Glacial geology
; flood
; geochronology
; glaciology
; ice sheet
; paleoenvironment
; Pleistocene
; radiocarbon dating
; sea ice
; Arctic Ocean
英文摘要: Paleoglaciology deals with glaciation cycles of the Quaternary Ice Age. It combines the dynamics of present-day ice sheets deduced from glaciology with the history of former ice sheets deduced from glacial geology. Cosmogenic dating now makes a detailed chronology of a cycle possible. Radiocarbon dating has provided a detailed chronology for Termination of the last cycle, but cannot date how the cycle began. Here we identify the central challenge in applying paleoglaciology to Quaternary glaciation cycles in general, and initiation of these cycles in particular. The challenge is the role of thickening sea ice in the Arctic Ocean, possibly becoming thick ice shelves floating over deep Arctic basins and high marine ice sheets grounded on shallow Arctic continental shelves. In that case, an Arctic Ice Sheet existed that was larger and less stable than the Antarctic Ice Sheet is now or in the past. Two approaches to this problem are presented as Part 1 and Part 2. In Part 1, the height of these former ice sheets is linked primarily to the strength of ice-bed coupling, which is deduced from glacial geology. It provides "snapshots" of ice sheets that give ice elevations independent of the past history and largely independent of ice-surface conditions, temperatures and the mass balance in particular. In Part 2, heights of former ice sheets depend on both their past history, particularly initial conditions, and changing surface conditions during the glaciation cycle. This provides a "motion picture" of ice sheets during the full cycle. The challenge is to establish a "mind meld" of these two approaches. They allow new perspectives on paleoglaciology. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60464
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Computer Sciences, Climate Change Institute, University of Maine, Orono, ME, United States; School of Earth and Climate Sciences, Climate Change Institute, University of Maine, 404 North Sixth Street, Fort Pierre, SD, United States
Recommended Citation:
Fastook J.L.,Hughes T.J.. New perspectives on paleoglaciology[J]. Quaternary Science Reviews,2013-01-01,80