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南海南部ODP 1143站位第四纪以来的蛋白石含量及其堆积速率与底栖有孔虫氧同位素记录的对比显示,900ka以来蛋白石含量及其堆积速率在间冰期明显增加,而冰期降低,反映了间冰期高的表层生产力,可能是由于间冰期夏季风的加强,从而导致了上升流的增强和营养提供的增加.底栖有孔虫氧同位素记录与蛋白石含量及其堆积速率的时间序列频谱分析结果表明,900 ka以来南海南部表层生产力变化主要受地球轨道周期的驱动.
Comparison of the opal content and its accumulation rate with that of benthic foraminiferal since the Quaternary of ODP 1143 station in the southern South China Sea shows that the opal content and its accumulation rate increased significantly during the interglacial period and decreased during the glacial period since 900 ka, The high surface productivity in the interglacial period may be due to the intensification of the summer monsoon during the interglacial period, which leads to the enhancement of the upwelling flow and the increase of nutrition. Time-series spectral analysis of benthic foraminiferal oxygen isotope records and opal content and its accumulation rate The results show that the change of surface productivity in the southern South China Sea since 900 ka is mainly driven by the orbital period.