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Pathways of pollen transport
Reconstructing pathways of aeolian pollen transport to the marine sediments along the coastline of SW Africa
Dupont, L.M., Wyputta, U.
Quaternary Science Reviews 22 (2003) 157-174
Together with Ulrike Wyputta, I studied the distribution of pollen in marine sediments to reconstruct pathways of terrigenous input to the oceans and to provide a record of vegetation change on adjacent continents. The wind transport routes of aeolian pollen are comprehensively illustrated by clusters of trajectories. Ulrike Wyputta computed isobaric, four-day backward trajectories using the modelled wind-field of ECHAM3, and clustered them on a seasonal basis. In this way, we estimated the main pathways of aeolian particles to sites of marine cores in the southeast Atlantic.
The trajectory clusters show three regional, and two seasonal patterns, determining the pathways of aeolian pollen transport into the south-eastern Atlantic ocean. Transport out of the continent occurs mainly during austral fall and winter, when easterly and south-easterly winds prevail. South of 25°S, winds blow mostly from the west and southwest, and aeolian terrestrial input is very low.
Generally, we found good latitudinal correspondence between the distribution patterns of pollen in marine surface sediments and the occurrence of the source plants on the adjacent continent. The Zambezian vegetation zone is the main source area for wind-blown pollen in sediments of the Angola basin, while the semi-desert and desert areas are the main sources for pollen in sediments of the Walvis basin and on the Walvis Ridge.
Apart from the aeolian pathway, rivers are the main vehicle for pollen and spores from the Congolian and Zambezian forests into the northern Angola basin.
Variability in glacial and Holocene marine pollen records offshore from west southern Africa
Dupont, L.M., Behling, H., Jahns, S., Marret, F., Kim, J.-H.
Vegetation History & Archaeobotany 16 (2007) 87-100
A compilation of pollen records covering the last 30,000 years gives insight in the variability and persistent features of pollen diagrams from marine sediments along the west coast of southern Africa.
Late Quaternary palynology in marine sediments: A synthesis of the understanding of pollen distribution patterns in the NW African setting
Hooghiemstra, H., Lézine, A.-M., Leroy, S.A.G., Dupont, L.M., Marret, F.
Quaternary International,148 (2006) 29-44
This is a review of earlier studies on pollen distribution in marine sediments of Northwest Africa.
