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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/1638

Title: Orbital forcing of climate over South Africa: A 200,000-year rainfall record from the Pretoria saltpan
Authors: Patridge, TC
Demenocal, PB
Lorentz, SA
Paiker, MJ
Vogel, JC
Keywords: Pretoria saltpan - South Africa
Subtropical regions
Orbital precession geometry
Late Pleistocene
Palaeomonsoon indices
Geosciences
Issue Date: 1997
Publisher: Pergamon-Elsevier Science Ltd
Citation: Patridge, TC, et al. 1997. Orbital forcing of climate over South Africa: A 200,000-year rainfall record from the Pretoria saltpan. Quaternary Science Reviews, vol 16(10), pp 1125-1133
Abstract: Late Pleistocene variations in rainfall in subtropical Southern Africa are estimated from sediments preserved in the Pretoria saltpan, a 200,000 year-old closed-basin crater lake on the interior plateau of South Africa. This record is one of the few long and continuous palaeoclimate records from the Southern hemisphere subtropics, as such it provides a fundamental test of the role of the orbital forcing on the global subtropical climate. The authors show that South African summer rainfall covaried with changes in southern hemisphere summer insolation resulting from orbital precession. As predicted by orbital precession geometry, this South African record is out of phase with North African palaeomonsoon indices; the amplitude of the rainfall response to insolation forcing agrees with climate model estimates. These results document the importance of direct orbital insolation forcing on both subtropical North and South African climate as well as the predicted antiphase sensitivity to precessional insolation forcing.
URI: http://hdl.handle.net/10204/1638
http://hdl.handle.net/10204/1638
ISSN: 0277-3791
Appears in Collections:Mining and geoscience
Climate change
General science, engineering & technology

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