Age model, isotope analyses, geochemical measurements and grain size analyses of sediment core GeoB9508-5 from the Senegal River Mouth, supplement to: Mulitza, Stefan; Prange, Matthias; Stuut, Jan-Berend W; Zabel, Matthias; von Dobeneck, Tilo; Itambi, Achakie C; Nizou, Jean; Schulz, Michael; Wefer, Gerold (2008): Sahel megadroughts triggered by glacial slowdowns of Atlantic meridional overturning. Paleoceanography, 23(4), PA4206

The influence of the large-scale ocean circulation on Sahel rainfall is elusive because of the shortness of the observational record. We reconstructed the history of eolian and fluvial sedimentation on the continental slope off Senegal during the past 57,000 years. Our data show that abrupt onsets o...

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Bibliographic Details
Main Authors: Mulitza, Stefan, Prange, Matthias, Stuut, Jan-Berend W, Zabel, Matthias, von Dobeneck, Tilo, Itambi, Achakie C, Nizou, Jean, Schulz, Michael, Wefer, Gerold
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2009
Subjects:
Gravity corer Kiel type
M65/1
Meteor 1986
Center for Marine Environmental Sciences MARUM
North Atlantic
Online Access:https://dx.doi.org/10.1594/pangaea.726789
https://doi.pangaea.de/10.1594/PANGAEA.726789
Description
Summary:The influence of the large-scale ocean circulation on Sahel rainfall is elusive because of the shortness of the observational record. We reconstructed the history of eolian and fluvial sedimentation on the continental slope off Senegal during the past 57,000 years. Our data show that abrupt onsets of arid conditions in the West African Sahel were linked to cold North Atlantic sea surface temperatures during times of reduced meridional overturning circulation associated with Heinrich Stadials. Climate modeling suggests that this drying is induced by a southward shift of the West African monsoon trough in conjunction with an intensification and southward expansion of the midtropospheric African Easterly Jet.

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