文献类型：期刊文献

中文题名：近8000年来珠江口沉积物磁化率及其气候环境意义

英文题名：Sediment Magnetic Susceptibility and its Indication to Climatic and Environmental Changes over the Last 8000 Years in the Pearl River Estuary

作者：冯钰婷[1,2];彭诗云[1,2];谢辉[1,2];孔德明[1,2];赵辉[1,2]

机构：[1]广东海洋大学海洋与气象学院;[2]广东省近海海洋变化与灾害预警重点实验室,广东湛江524088

年份：2018

卷号：38

期号：3

起止页码：49

中文期刊名：广东海洋大学学报

外文期刊名：Journal of Guangdong Ocean University

收录：CSTPCD

基金：国家自然科学青年基金(41606070);广东海洋大学博士启动基金(R17011);广东海洋大学创新强校项目(GDOU2014050201);广东省自然科学基金(2016A030310331)

语种：中文

中文关键词：珠江口;磁化率;夏季风;环境演变

外文关键词：Pearl River Estuary;magnetic susceptibility;summer monsoon;environmental evolution

中文摘要：【目的】研究磁化率在亚洲季风区河口海岸环境中的变化及其指示意义。【方法】利用珠江口沉积物柱状样HKUV16,结合放射性碳定年,重建近8 000 a来沉积物的磁化率变化。【结果】距今8 000~3 000 a磁化率呈现下降趋势,表明随着东亚夏季风减弱,输送到珠江口的陆源沉积物减少。而从距今2 500 a开始,HKUV16磁化率显著上升,在距今400 a达到最大2 700×10^(-6)SI。【结论】该变化趋势与近2 000 a以来珠江流域人类活动的增加以及夏季风的变强一致,近2 000 a来人类活动对珠江口环境的影响已逐渐超过了夏季风等自然因素带来的变化。

外文摘要：【Objective】To study changes and its application of MS in the coastal and estuarine environments in the Asian monsoon regions.【Method】Sediment core HKUV16 collected from the Pearl River Estuary（PRE） was used to reconstruct magnetic susceptibility changes over the last 8 thousands years with age controlled by radiocarbon dating.【Result】The results showed prominent decreasing trend from 8000 to 3 000 years BP which suggested less terrestrial material imput to the PRE under the background of weakening of East Asian summer monsoon. The MS of HKUV16 increased significantly from 2 500 to 400 years BP when the MS reached the peak value 2 700×10^（-6） SI. Changes of MS since 2 000 years BP coincided with the expansion of human activities in the Pearl River drainage area, as well as the intensified summer monsoon.【Conclusion】It suggested human activities has been exerting increasingly impact on the PRE environment over the last 2 000 years than natural factors such as the summer monsoon. The results of this study could provide good reference for further application of MS in environment and climate reconstructions in coastal and estuarine areas.