1. Low-latitude “dusty events” vs. high-latitude “icy Heinrich events”
- Author
-
Jullien, Elsa, Grousset, Francis, Malaizé, Bruno, Duprat, Josette, Sanchez-Goni, Maria Fernanda, Eynaud, Frédérique, Charlier, Karine, Schneider, Ralph, Bory, Aloys, Bout, Viviane, and Flores, Jose Abel
- Subjects
LATITUDE ,ICEBERGS ,TROPICAL conditions - Abstract
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. [Copyright &y& Elsevier]
- Published
- 2007
- Full Text
- View/download PDF