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A high-resolution(4-5cm/kyr)giant piston core record(MD962085)retrieved during an IMAGES Ⅱ-NAUSICAA cruise from the continentalslope of the southeast Atlantic Ocean reveal striking variations in plank-tonic foraminifer faunal abundances and sea-surface temperatures(SST)during the past 400,000 years.The location and high-quality sedimentaryrecord of the core provide a good opportunity to assess changes in the intensityand position of the Benguela Current System and the SubtropicalConvergence,two key features of the ocean-climate system in the southAtlantic.This record can be also used to evaluate the possible influence ofAgulhas Current from the throughflow of the Indian Ocean into the SouthAtlantic.The planktonic foraminifer faunal abundances of the core aredominated by three assemblages:(1)N.pachyderma(right coiling)+N.dutertrei,(2)G.bulloides,and(3)G.inflata.The assemblage of N.pachyderma(right coiling)+N.dutertrei shows distinctive abundance changes whichare nearly in-phase with glacial-interglacial variations.High abundancesof this assemblage are associated with major glacial conditions,possiblyrepresenting low SST/high nutrient level conditions in the southwesternAfrica margin.In contrast,the assemblages of G.bulloides and G.inflatashow more high-frequency abundance change patterns,which are not well-parallel to glacial-interglacial changes.These patterns may indicate rapidoceanic frontal movements from the south,and a rapid change in the intensity of Benguela upwelling system from the east.A winter-season SST estimate using transfer function techniques for this record shows primarilyglacial-interglacial variations.The SST reaches maxima during the transitions from the major glacial to interglacial stages(Termination Ⅱ,Ⅲ,Ⅳ),and is associated with the abundance maxima of a warm water species indicator G.ruber.The relationship shown by the SST and planktonic foraminifer (The equation is abbreviated)^(18)O implies that the SST maxima lead the (The equation is abbreviated)^(18)O minima by approximately 3-5 kyr.

Dynamics of currents in a Small-scale Coastal Lagoon,Southwestern Taiwan