Eolian evidence for spatial variability of late Quaternary climates in tropical Africa

Auteurs :
POKRAS, E. M.
MIX, A. C.

Description :
Tropical northwest Africa was driest during glaciations and stades, but wetter than at present during interglaciations and interstades. This may be a response to ice sheets at higher latitudes, via equatorward displacement of the westerlies and the subtropical high. In contrast, central equatorial Africa (southeast of the Sahara) was most arid during interstades and times of ice growth, and most humid during deglaciation. Wet periods in this area correspond to insolation maxima in northern hemisphere summer. A 23,000. yr precessional rythm is suggested, supporting a direct link between African Monsoon intensity and orbitally modulated insolation.


Type de document :
Article de périodique

Source :
Quaternary research New York, 1985, vol. 24, n°. 2, p. 137-149, Références bibliographiques : 54 réf.

Date :
1985