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(Article of periodic en Anglais - 1985)

Document title

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

Authors(s) and Affiliation(s)

POKRAS E. M. ; MIX A. C. ;

Abstract

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.

Source

Article of periodic

published at : Quaternary research New York

Editor :

Millesime : 1985, vol. 24, no2 [pp. 137-149]

Bibliographic references : 54 réf.

Language

Anglais

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