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中文摘要：
应用分子化石长链烯酮的不饱和度,在南海西部取得了45万年以来表层水温的变化记录,分辨率约1ka,是南海迄今为止时间最长的高分辨率温度剖面.结果表明U3k7′-SST与有孔虫氧同位素一样显示出冰期旋回的特征,冰期、间冰期表层水温的变化范围分别为23～25.5℃和25～28℃,最高温为MIS5.5时期的28.4℃,最低温为MIS2时期的22.6℃.5次冰期旋回转换期中温度变化都超前于有孔虫氧同位素,与南北半球温度变化记录对比显示南海的温度变化模式与南半球相似.频谱分析中强烈的岁差及半岁差周期显示了明显的热带区域特征.
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