从陆架泥质沉积中寻找高分辨率的全新世东亚季风记录

Exploring High-Resolution Records of the Holocene East Asian Monsoon from Mud Sediments on Shelves of China Marginal Seas

当前对全新世东亚季风的研究,一是重造了不同地区的季风气候与环境特点,分析、划分了不同的阶段并总结了各阶段的特点;二是通过高分辨率的气候代用指标进一步开展定量古气候研究,揭示其变化与周期,探讨其驱动机制.已有的研究主要来自陆地,而利用海洋沉积物研究季风则集中在深海;且主要体现的是气候整体变化特征或侧重于夏季风,而专门论述全新世东亚冬季风的报道则较少;尚未在短时间尺度上有效地确定全新世东亚冬、夏季风的关系及其驱动机制.该文指出,可以利用中国边缘海陆架泥质沉积开展全新世高分辨率的东亚古季风研究,其粒度和Rb/Sr比值等元素地球化学指标可分别作为高分辨率的东亚冬、夏季风演化的替代性指标.

The reported research on the Holocene East Asian Monsoon （EAM） can be divided into two stages. Early research lays stress on reconstrucing Holocene monsoon climate and environment in various areas, analyzing and classifying Holocene into different periods, and summerizing characteristics of each period; recent research emphasizes revealing its change and cycles, and discussing its driving mechanism. On one hand, most reported researchs on the Holocene EAM are from continents, and some from marine sediments are collected from deep sea; On the other hand, they mainly focus on changes of the whole climate or the Holocene East Asian Summer Monsoon （EASM）, and least on East Asian Winter Monsoon （EAWM）. The relation- ship between the Holocene EASM and EAWM is nor revealed on short time scale, and their driving mechanism is still in probing. In this paper, we think mud on the shelves of Chinese Marginal Seas is good material to study the Holocene EAM; and its grain-size and Rb/Sr are high-resolution proxies of EAWM and EASM respectively.