DOI: 10.1016/j.quascirev.2013.07.006
Scopus记录号: 2-s2.0-84885954906
论文题名: Dinocyst-based reconstructions of sea ice cover concentration during the Holocene in the Arctic Ocean, the northern North Atlantic Ocean and its adjacent seas
作者: De Vernal A. ; Hillaire-Marcel C. ; Rochon A. ; Fréchette B. ; Henry M. ; Solignac S. ; Bonnet S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 79 起始页码: 111
结束页码: 121
语种: 英语
英文关键词: Arctic Ocean
; Atlantic Ocean
; Dinocysts
; Holocene
; Sea ice
Scopus关键词: Arctic ocean
; Atlantic Ocean
; Dinocysts
; Holocenes
; Large amplitude
; Modern analogue techniques
; North Atlantic Ocean
; Sea ice concentration
; Oceanography
; Repair
; Sea ice
; concentration (composition)
; dinoflagellate cyst
; Holocene
; ice cover
; reconstruction
; sea ice
; Arctic Ocean
; Atlantic Ocean
英文摘要: Sea ice cover extent expressed in terms of mean annual concentration was reconstructed from the application of the modern analogue technique to dinocyst assemblages. The use of an updated database, which includes 1492 sites and 66 taxa, yields sea ice concentration estimates with an accuracy of ±1.1/10. Holocene reconstructions of sea ice cover were made from dinocyst counts in 35 cores of the northern North Atlantic and Arctic seas. In the Canadian Arctic, the results show high sea ice concentration (>7/10) with little variations throughout the interval. In contrast, in Arctic areas such as the Chukchi Sea and the Barents Sea, the reconstructions show large amplitude variations of sea ice cover suggesting millennial type oscillations with a pacing almost opposite in western vs. eastern Arctic. Other records show tenuous changes with some regionalism either in trends or sea ice cover variability. During the mid-Holocene, and notably at 6±0.5ka, minimum sea ice concentration is recorded in the eastern Fram Strait, northern Baffin Bay and Labrador Sea. However, this minimum cannot be extrapolated at the scale of the Arctic and circum-Arctic. The comparison of recent observations and reconstructions suggests larger variations in the Arctic sea ice cover during the last decades than throughout the Holocene. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60470
Appears in Collections: 过去全球变化的重建
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作者单位: Centre de recherche en géochimie et géodynamique (Geotop), Université du Québec à Montréal, PO Box 8888, Montréal, QC H3C 3P8, Canada; ISMER, Université du Québec à Rimouski, 310 allée des Ursulines, Rimouski, QC G5L 3A1, Canada
Recommended Citation:
De Vernal A.,Hillaire-Marcel C.,Rochon A.,et al. Dinocyst-based reconstructions of sea ice cover concentration during the Holocene in the Arctic Ocean, the northern North Atlantic Ocean and its adjacent seas[J]. Quaternary Science Reviews,2013-01-01,79