DOI: 10.1016/j.quascirev.2014.04.026
Scopus记录号: 2-s2.0-84903183019
论文题名: 10Be dating of the Narsarsuaq moraine in southernmost Greenland: Evidence for a late-Holocene ice advance exceeding the Little Ice Age maximum
作者: Winsor K. ; Carlson A.E. ; Rood D.H.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 98 起始页码: 135
结束页码: 143
语种: 英语
英文关键词: Cosmogenic surface exposure dating
; Glacial geology
; Greenland ice sheet
Scopus关键词: Concurrency control
; Glacial geology
; Ice control
; Climate variability
; Greenland
; Greenland Ice Sheet
; Little Ice Age
; North Atlantic
; Surface exposure dating
; Ice
; beryllium isotope
; climate effect
; climate variation
; dating method
; Holocene
; ice margin
; ice retreat
; ice sheet
; Little Ice Age
; moraine
; Arctic
; Greenland
英文摘要: In southernmost Greenland near Narsarsuaq, the terminal Narsarsuaq moraine was deposited well outside of a historical Little Ice Age (LIA) moraine adjacent to the modern ice margin. Using 10Be surface exposure dating, we determine Narsarsuaq moraine abandonment at 1.51±0.11ka. A second set of 10Be ages from a more ice-proximal position shows that ice has been within or at its historical (i.e., LIA) extent since 1.34±0.15ka. Notably, Narsarsuaq moraine abandonment was coincident with climate amelioration in southern Greenland. Southern Greenland warming at ~1.5ka was also concurrent with the end of the Roman Warm Period as climate along the northern North Atlantic sector of Europe cooled into the Dark Ages. The warming of southern Greenland and retreat of ice from the Narsarsuaq moraine is consistent with studies suggesting possible anti-phase centennial-scale climate variability between northwestern Europe and southern Greenland. Other southernmost Greenland ice-margin records do not preclude a pre-LIA ice-margin maximum, potentially concurrent with a Narsarsuaq advance prior to ~1.51ka, but also lack sufficient ice-margin control to confirm such a correlation. We conclude that there is a clear need to further determine whether a late-Holocene pre-LIA maximum was a local phenomenon or a regional southern Greenland ice maximum, and if this advance and retreat reflects a regional fluctuation in climate. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60204
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geoscience, University of Wisconsin-Madison, WI, Madison 53706, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, United States; Scottish Universities Environmental Research Centre (SUERC), University of Glasgow, East Kilbride G75 0QF, United Kingdom; Earth Research Institute, University of California-Santa Barbara, Santa Barbara, CA 93106, United States
Recommended Citation:
Winsor K.,Carlson A.E.,Rood D.H.. 10Be dating of the Narsarsuaq moraine in southernmost Greenland: Evidence for a late-Holocene ice advance exceeding the Little Ice Age maximum[J]. Quaternary Science Reviews,2014-01-01,98