根据南沙群岛海区NS93- 5柱样浮游有孔虫分布和高分辨率氧同位素地层学 ,揭示了氧同位素 1— 6期 ,其中氧同位素 2期的值最重 ,5期的值最轻。运用浮游有孔虫古生态转换函数求得冬季表层海水温度为 2 2— 2 8 C ,夏季变动在 2 8— 30 C之间 ,季节温差为 1—6 C ,冬季海水表层温度则是以上次冰期最低 ,末次间冰期最高 ,末次盛冰期的冬季表层水温下降幅度最大 ,很好地反映了距今 2 0 0ka以来表层水温的变化特征 According to NS93-5 column-like planktonic foraminiferal distribution and high-resolution oxygen isotope stratigraphy in the Nansha Islands, the oxygen isotope 1-6 stage was revealed. Among them, the oxygen stage 2 was the heaviest and the stage 5 was the lightest. Using the paleosol transfer function of planktonic foraminifera, the winter surface seawater temperature is 2 2- 28 C, the variation in summer is 2-8-30 C, the seasonal temperature difference is 1-6 C, and the winter sea surface temperature is calculated from the last time The lowest in glacial period, the highest in the last interglacial period, and the largest decrease in surface temperature of winter in the last glaciation period, which well reflects the variation of surface water temperature since the present of 200 ka