DOI: 10.1016/j.palaeo.2016.12.031
论文题名: Holocene paleoceanography of the Bay of Biscay: Evidence for west-east linkages in the North Atlantic based on dinocyst data
作者: Zumaque J. ; Eynaud F. ; de Vernal A.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 468 起始页码: 403
结束页码: 413
语种: 英语
英文关键词: Bay of Biscay
; Climatic optimum
; Dinocysts
; Episodes of cooling
; Holocene
; Sea-surface conditions
英文摘要: Paleoceanographical changes during the Holocene were reconstructed from the study of core MD95-2002 situated in the northern Bay of Biscay, which is marked by the direct influence of the northeastern return branch of the North Atlantic Drift. Palynological data, sea-surface condition estimates based on dinocyst assemblages and stable isotope measurements in planktic and benthic foraminifera reveal a strong influence of freshwater/meltwaters from both the proximal European sources and the more distal Laurentide Ice Sheet, which experienced delayed deglaciation. The data also indicate the setting of a climate optimum between 7 and 5.5 ka followed by a cooling trend, which is consistent with insolation changes and other regional records of climate changes. Superimposed on the long term trends, the reconstructions of sea-surface conditions evidence large amplitude changes at centennial to millennial time-scales, with seven episodes of cooling and low salinity since 11 ka that generally match episodes of dense sea-ice cover in the Labrador Sea. The west to east transfer of the sea-ice and/or meltwater signal across the North Atlantic evidenced from core MD95-2002 points to strong linkages between western and eastern North Atlantic, probably in relation to the North Atlantic Oscillation (NAO) mode of variability. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67951
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: GEOTOP, Université du Québec à Montréal, CP 8888, Montréal, Québec, Canada; Université de Bordeaux, EPOC, UMR 5805, Talence, France
Recommended Citation:
Zumaque J.,Eynaud F.,de Vernal A.. Holocene paleoceanography of the Bay of Biscay: Evidence for west-east linkages in the North Atlantic based on dinocyst data[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,468