Bé A W, Duplessy J C
Science. 1976 Oct 22;194(4263):419-22. doi: 10.1126/science.194.4263.419.
Oxygen isotopic and microfaunal analyses and shell size variations of Orbulina universa in two Indian Ocean cores indicate that the position of the Subtropical Convergence has fluctuated between a northern limit north of 31 degrees S during glacial stages and its present, maximum southern limit. The northward displacement of the Subtropical Convergence to a position off Durban, South Africa, reflects the general weakness of the Agulhas Current during glacial stages and parts of interglacial stages, representing about 65 percent of the past 540,000 years.
对印度洋两个岩芯中的环球圆筛藻进行的氧同位素和微动物群分析以及壳体大小变化表明，亚热带辐合带的位置在冰期时曾在南纬31度以北的北部界限与其目前的最南界限之间波动。亚热带辐合带向北移动至南非德班附近的位置，反映出在冰期以及部分间冰期阶段阿古拉斯洋流总体较为微弱，这种情况在过去54万年中约占65%。
