Temporal changes in North Atlantic circulation constrained by planktonic foraminiferal shell weights

被引：56

作者：

Barker, S ^{[1
]}

Kiefer, T ^{[1
]}

Elderfield, H ^{[1
]}

机构：

[1] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

来源：

PALEOCEANOGRAPHY | 2004年 / 19卷 / 03期

关键词：

foraminiferal shell weights; dissolution; North Atlantic circulation;

D O I：

10.1029/2004PA001004

中图分类号：

P [天文学、地球科学];

学科分类号：

07 [理学];

摘要：

[1] Records of planktonic foraminiferal shell weights for Globigerina bulloides, covering Termination I from four proximal sites at waters depths from 1150 to 4045 m in the northeast Atlantic, demonstrate the influence of dissolution superimposed upon initial shell weight variability. Records of shell weight, unaffected by dissolution, may be used as a reference for interpreting deeper records in terms of preservation history. Combining records of planktonic shell weight (and benthic delta(13)C) from shallow and deep sites suggests that maximum oceanic stratification and incursion of southern sourced deep waters in the North Atlantic occurred at about 18-20 ka, defining the glacial mode of Atlantic circulation. Reduced stratification and enhanced preservation in deeper waters reflect conditions during Heinrich event 1. A state similar to the modern mode of Atlantic circulation was attained by about 10 ka.

引用

页码：PA30081 / 15

页数：16

共 72 条

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