10.1594/PANGAEA.743078
Bouimetarhan, Ilham
Ilham
Bouimetarhan
0000-0003-3369-3811
Dupont, Lydie M
Lydie M
Dupont
0000-0001-9531-6793
Schefuß, Enno
Enno
Schefuß
0000-0002-5960-930X
Mollenhauer, Gesine
Gesine
Mollenhauer
0000-0001-5138-564X
Mulitza, Stefan
Stefan
Mulitza
0000-0002-3842-1447
Zonneveld, Karin A F
Karin A F
Zonneveld
0000-0002-3390-1572
Pollen and organic-walled dinoflagellate cyst assemblages of sediment core GeoB9503-5
PANGAEA
2009
Gravity corer (Kiel type)
M65/1
Meteor (1986)
Center for Marine Environmental Sciences (MARUM)
2005-06-13T14:31:00
en
Supplementary Publication Series of Datasets
10.1016/j.yqres.2009.05.003
3 datasets
application/zip
Creative Commons Attribution 3.0 Unported
Pollen and organic-walled dinoflagellate cyst assemblages from core GeoB 9503-5 retrieved from the mud-belt ( 50 m water depth) off the Senegal River mouth have been analyzed to reconstruct short-term palaeoceanographic and palaeoenvironmental changes in subtropical NW Africa during the time interval from ca. 4200 to 1200 cal yr BP. Our study emphasizes significant coeval changes in continental and oceanic environments in and off Senegal and shows that initial dry conditions were followed by a strong and rapid increase in humidity between ca. 2900 and 2500 cal yr BP. After ca. 2500 cal yr BP, the environment slowly became drier again as indicated by slight increases in Sahelian savannah and desert elements in the pollen record. Around ca. 2200 cal yr BP, this relatively dry period ended with periodic pulses of high terrigenous contributions and strong fluctuations in fern spore and river plume dinoflagellate cyst percentages as well as in the fluxes of pollen, dinoflagellate cysts, fresh-water algae and plant cuticles, suggesting "episodic flash flood" events of the Senegal River. The driest phase developed after about 2100 cal yr BP.
Supplement to: Bouimetarhan, Ilham; Dupont, Lydie M; Schefuß, Enno; Mollenhauer, Gesine; Mulitza, Stefan; Zonneveld, Karin A F (2009): Palynological evidence for climatic and oceanic variability off NW Africa during the late Holocene. Quaternary Research, 72(2), 188-197
-16.6525
16.066499999999998