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科学通报  2015 

东海内陆架泥质沉积记录的全新世快速气候波动

DOI: 10.1360/N972014-00069, PP. 411-419

Keywords: 快速气候波动,全新世,东海内陆架,泥质区,古海洋学事件

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Abstract:

以东海内陆架泥质区中部MZ02孔岩芯沉积物为材料,挑选底栖有孔虫单种Ammoniacompressiuscula进行了壳体氧碳稳定同位素和镁钙比值分析,并结合沉积物粒度、磁化率和地球化学等古环境替代指标,讨论了MZ02孔沉积记录所反映的若干气候和海洋环境变化,识别出发生在8.4,7.2和6.2kaBP的3次千年事件,其中最为显著的是发生在8.4kaBP的降温事件.本研究揭示的中全新世大暖期内气候波动特征,与相邻陆地的季风记录、热带太平洋的古海洋记录相一致,具有百年尺度的太阳活动周期,其中以200a周期最为显著,推测太阳活动可能是研究区全新世快速气候变化的主要原因之一.

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