Climatic changes during the last deglaciation recorded in sediment cores from the northeastern Brazilian Continental Margin

被引：0

作者：

Arz H.W. ^{[1
]}

Pätzold J. ^{[1
]}

Wefer G. ^{[1
]}

机构：

[1] Fachbereich Geowissenschaften, Universität Bremen

来源：

Geo-Marine Letters | 1999年 / 19卷 / 3期

关键词：

Sedimentation; Sedimentation Rate; Stratigraphy; Sediment Core; Continental Margin;

D O I：

10.1007/s003670050111

中图分类号：

学科分类号：

摘要：

Detailed 14C AMS data and isotope based stratigraphies from high-resolution paleoceanographic records for the last 22 ka of cores from the upper continental slope off NE Brazil reveal sedimentation rates of up to 100 cm per 1000 yr. Variations in the sediment composition relate to changes in the input of terrigenous material. The sedimentation is controlled by sea level and by the climatic regime of the hinterland. Short-term changes in the tropical wind field may act as a climatic trigger. The zonality of the SE trades was probably increased and the monsoonal activity over Africa reduced during the Younger Dryas period.

引用

页码：209 / 218

页数：9

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