Multivariate statistical analysis on the kaolinite/chlorite ratios from 20 South Atlantic sediment cores, supplement to: Krüger, Stefan; Leuschner, Dirk C; Ehrmann, Werner; Schmiedl, Gerhard; Mackensen, Andreas; Diekmann, Bernhard (2008): Ocean circulation patterns and dust supply into the South Atlantic during the last glacial cycle revealed by statistical analysis of kaolinite/chlorite ratios. Marine Geology, 253(3-4), 82-91

DOI

Multivariate statistical analysis on the kaolinite/chlorite ratios from 20 South Atlantic sediment cores allowed for the extraction of two processes controlling the fluctuations of the kaolinite/chlorite ratio during the last 130,000 yrs, (1) the relative strength of North Atlantic Deep Water (NADW) inflow into the South Atlantic Ocean and (2) the influx of aeolian sediments from the south African continent. The NADW fluctuation can be traced in the entire deep South Atlantic while the dust signal is restricted to the vicinity of South Africa. Our data indicate that NADW formation underwent significant changes in response to glacial/interglacial climate changes with enhanced export to the Southern Hemisphere during interglacials. The most pronounced phases with Enhanced South African Dust Export (ESADE) occurred during cold Marine Isotope Stage (MIS) 5d and across the Late Glacial/Holocene transition from 16 ka to 4 ka (MIS 2 to 1). This particular pattern is attributed to the interaction of Antarctic Sea Ice extent, the position of the westerlies and the South African monsoon system.

Identifier
DOI http://dx.doi.org/doi:10.1594/PANGAEA.774777
Metadata Access http://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite3&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.774777
Provenance
Creator Mackensen, Andreas;Leuschner, Dirk C;Krüger, Stefan;Schmiedl, Gerhard;Ehrmann, Werner;Diekmann, Bernhard
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2008
Rights Creative Commons Attribution 3.0 Unported (CC-BY)
Representation
Language English
Resource Type Supplementary Collection of Datasets
Format application/zip
Discipline Earth System Research
Spatial Coverage (60S-7 S,43W-37E)
Temporal Point 1988-03-04T11:59:59Z