Late Quaternary highstands at Lake Chilwa, Malawi: Frequency, timing and possible forcing mechanisms in the last 44ka

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dc.contributor.author Bailey, Richard
dc.contributor.author Shaw, Paul A.
dc.contributor.author Thomas, David S. G.
dc.contributor.author Durcan, Julie A.
dc.contributor.author Singarayer, Joy S.
dc.date.accessioned 2010-12-15T10:53:35Z
dc.date.available 2010-12-15T10:53:35Z
dc.date.issued 2009-03
dc.identifier.citation Bailey , R , Shaw , P A , Thomas , D S G , Durcan , J A & Singarayer , J S 2009 , ' Late Quaternary highstands at Lake Chilwa, Malawi: Frequency, timing and possible forcing mechanisms in the last 44ka ' Quaternary Science Reviews , vol 28 , no. 5-6 , pp. 5-6 . , 10.1016/j.quascirev.2008.10.023 en
dc.identifier.issn 0277-3791
dc.identifier.other PURE: 155212
dc.identifier.other dspace: 2160/6014
dc.identifier.uri http://hdl.handle.net/2160/6014
dc.description Thomas, D.S.G., Bailey, R., Shaw, P.A., Drucan, J.A., Singarayer, J.S. (2009). Late Quaternary highstands at Lake Chilwa, Malawi: Frequency, timing and possible forcing mechanisms in the last 44ka. Quaternary Science Reviews, 28(5-6): 526-539 en
dc.description.abstract The extensive shoreline deposits of Lake Chilwa, southern Malawi, a shallow water body today covering 600 km2 of a basin of 7500 km2, are investigated for their record of late Quaternary highstands. OSL dating, applied to 36 samples from five sediment cores from the northern and western marginal sand ridges, reveal a highstand record spanning 44 ka. Using two different grouping methods, highstand phases are identified at 43.7–33.3 ka, 26.2–21.0 ka and 17.9–12.0 ka (total error method) or 38.4–35.5 ka, 24.3–22.3 ka, 16.2–15.1 ka and 13.5–12.7 ka (Finite Mixture Model age components) with two further discrete events recorded at 11.01 ± 0.76 ka and 8.52 ± 0.56 ka. Highstands are comparable to the timing of wet phases from other basins in East and southern Africa, demonstrating wet conditions in the region before the LGM, which was dry, and a wet Lateglacial, which commenced earlier in the southern compared to northern hemisphere in East Africa. We find no evidence that wet phases are insolation driven, but analysis of the dataset and GCM modelling experiments suggest that Heinrich events may be associated with enhanced monsoon activity in East Africa in both timing and as a possible causal mechanism. en
dc.format.extent 2 en
dc.language.iso eng
dc.relation.ispartof Quaternary Science Reviews en
dc.title Late Quaternary highstands at Lake Chilwa, Malawi: Frequency, timing and possible forcing mechanisms in the last 44ka en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.quascirev.2008.10.023
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Centre for Glaciology en
dc.description.status Peer reviewed en


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