Low-latitude "dusty events" vs. high-latitude "icy Heinrich events"

Jullien, E., Grousset, F., Malaize, B., Duprat, J., Sanchez-Goni, M. F., Eynaud, F., Charlier, K., Schneider, R., Bory, A., Bout, V. and Flores, J. A. (2007) Low-latitude "dusty events" vs. high-latitude "icy Heinrich events" Quaternary Research, 68 (3). pp. 379-386. DOI 10.1016/j.yqres.2007.07.007.

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Abstract

It has been proposed that tropical events could have participated in the triggering of the classic, high-latitude, iceberg-discharge Heinrich events (HE). We explore low-latitude Heinrich events equivalents at high resolution, in a piston core recovered from the tropical north-western African margin. They are characterized by an increase of total dust, lacustrine diatoms and fibrous lacustrine clay minerals. Thus, low-latitude events clearly reflect severe aridity events that occurred over Africa at the Saharan latitudes, probably induced by southward shifts of the Inter Tropical Convergence Zone. At a first approximation, it seems that there is more likely synchronicity between the high-latitude Heinrich Events (HEs) and low-latitude events (LLE), rather than asynchronous behaviours. (c) 2007 University of Washington. All rights reserved.

Document Type: Article
Keywords: Pleistocene low-latitudes Heinrich events dust Ti/Al clays past 130,000 years millennial-scale north-atlantic climate-change ocean wind atmosphere deposition greenland sediments
Research affiliation: Kiel University
Refereed: No
DOI etc.: 10.1016/j.yqres.2007.07.007
ISSN: 0033-5894
Date Deposited: 12 Jan 2012 05:48
Last Modified: 31 Jan 2019 04:47
URI: http://eprints.uni-kiel.de/id/eprint/15914

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