DOI: 10.1016/j.quascirev.2014.10.021
Scopus记录号: 2-s2.0-84909583579
论文题名: The influence of meltwater on the Labrador Current in Heinrich event 1 and the Younger Dryas
作者: Li G. ; Piper D.J.W.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 107 起始页码: 129
结束页码: 137
语种: 英语
英文关键词: Flemish Pass
; Heinrich event 1
; Labrador Current
; Melt water
; Younger Dryas
Scopus关键词: Glaciers
; Sea ice
; Water
; Flemish Pass
; Heinrich Events
; Labrador Current
; Melt water
; Younger Dryas
; Ice
; detritus
; Heinrich event
; iceberg
; last deglaciation
; meltwater
; meridional circulation
; paleoclimate
; surface water
; X-ray diffraction
; Younger Dryas
; Atlantic Ocean
; Flemish Pass
; Labrador Current
英文摘要: The Labrador Current transports freshwater from the Arctic regions to the northern Atlantic and the freshwater flux can influence the meridional overturning circulation. The response of the Labrador Current to meltwater processes is unclear during the deglaciation of the ice sheets around the northwest Atlantic. This study utilized cores from Flemish Pass to monitor variations in the strength of the Labrador Current by using the sortable-silt proxy. The carbonate content, the amount of ice-rafted detritus and XRF chemical data were measured to identify the main meltwater events during the last deglaciation. This study observed a clear enhancement of the flow strength of the Labrador Current in Heinrich Event 1 and the Younger Dryas, with the greatest flow strength during the Younger Dryas event. The onset of the current enhancement was dated at ca13calkaBP, which preceded the enhanced ice-rafted deposition in Hudson Strait by about one thousand years. The current enhancement in Flemish Pass during the Younger Dryas event corresponds to the freshening of the surface water. Thus meltwater preceding significant iceberg supply has an important effect on the Labrador Current in Heinrich events on the Laurentide Ice Sheet margin. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60086
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guang Zhou, Guang Dong, China; Geological Survey of Canada (Atlantic), Natural Resources Canada, Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth, Nova Scotia, Canada
Recommended Citation:
Li G.,Piper D.J.W.. The influence of meltwater on the Labrador Current in Heinrich event 1 and the Younger Dryas[J]. Quaternary Science Reviews,2015-01-01,107