渤海庙岛剖面记录的近130ka气候环境海岸带沉积信息的研究

项目名称： 渤海庙岛剖面记录的近130ka气候环境海岸带沉积信息的研究

项目编号： No.41206036

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 海洋科学

项目作者： 杜恕环

作者单位： 中国科学院南海海洋研究所

项目金额： 25万元

中文摘要： 分析东部季风区海岸带的高分辨率黄土-古土壤沉积序列及其古季风变化信息，对揭示东亚古季风环境的时空演变过程具有不可替代性作用。本项研究拟选择渤海庙岛剖面作为代表性的地层记录，建立末次间冰期以来的气候-环境序列，采用不同的年代测试方法（14C-AMS和OSL）确定可与深海和冰芯氧同位素各主、亚阶段进行对比的年代学框架，运用粒度、磁化率、碳酸钙、化学元素等各种理化分析指标，揭示近130ka存在的多旋回千年尺度环境交替演化过程，探讨晚第四纪东亚季风在我国海岸带地区的时空演变特征与规律，填补末次间冰期以来海岸带黄土千年尺度气候变化记录的空白,并在此基础上与同纬度毛乌素沙漠的风沙沉积序列进行时空对比，更进一步探索晚第四纪以来中国东部季风区的环境变迁与东亚季风演化，为进行全球变化特别是千年尺度气候事件对比提供新的基础资料与科学依据。

中文关键词： 渤海海岸带；风成沉积物；庙岛剖面；气候环境；末次间冰期

英文摘要： Analysis of the high resolution loess-paleosol sedimentary sequence and paleo-monsoon changed information on coastal zone among the East Monsoon region of China, which irreplaceable role in revealing the temporal and spatial evolution in the process of East Asian Monsoon environment. This study intends to choose Miaodao Section in Bohai Sea as the representative stratum record, establish the climate-environment sequence since the last interglacial, using different chronology test measures as 14C-AMS and OSL to confirm the chronology framework, which can contrast with each stage and substage in the GRIP ice core and the marine core, utilize the physicochemical indices like grain size, magnetic susceptibility, calcium carbonate, chemical element to reveal the multicycle kiloyear-scale environment alternate evolution process during the nearly 130 ka, explore the temporal and spatial development characteristics and rules of East Asian Monsoon on east China's coastal zone since the late Quaternary, fill up the blank of coastal loess kiloyear-scale climate events record since the last interglacial, on this basis contrast with the aeolian deposition sequence at the Mu Us Desert in the same latitude, further explore the process of environment change and East Monsoon evolution since the late Quaternary among the monsoon

英文关键词： Bohai Sea coastal zone；eolian deposition；Miaodao section；climatic environment；last interglacial period