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根据南海南沙海区１７９５７－２柱中放射虫组合，浮游有孔虫丰度以及氧同位素和沉积学记录的研究，发现中更新世气候转型是一种复杂的转型现象．放射虫／浮游有孔虫比值，粗组分和放射虫组合的明显变化可能与 ９０万年前“中更新世革命（ＭＰＲ）”所造成的全球气候变冷有关．北赤道流明显向南移动，导致南海表层水温的下降，这一结果已由９０万年前热带与亚热带放射虫组合的变化所证实．“中更新世革命”以后高的放射虫丰度可能显示了上升流的增强和营养提供．放射虫组合在９０万年前的突然变化可能反映了放射虫组合对由气候变化所导致的洋流变化的响应．
According to the study of radiolarian assemblages, abundance of planktonic foraminifera and records of oxygen isotopes and sediments in the 17957-2 column of the Nansha sea area of the South China Sea, the mid-Pleistocene climatic transition is a complex transition phenomenon. Significant changes in radiolarian / planktonic foraminiferal assemblages, coarse fractions and radiolarian assemblages may be related to the global climate change caused by the “mid-Pleistocene Revolution” (MPR) 90 million years ago. The apparent migration of the northern equatorial stream to the south has led to a decrease in the surface water temperature over the South China Sea, a result confirmed by changes in the combination of tropical and subtropical radionuclides of 900,000 years ago. High levels of radiolarian abundance after the “middle Pleistocene revolution” may indicate enhanced upwelling and nutrient availability. Sudden changes in the radio-worm assemblage 900,000 years ago may reflect the response of the radio-worm assemblages to changes in ocean currents caused by climate change.