对数比变换在因子分析法提取东亚冬季风敏感粒级中的应用——以南黄海中部泥质区H07孔为例  

APPLICATIONS OF LOGARITHM RATIO TRANSFORMATION TO EXTRACTION OF THE SENSITIVE GRAIN SIZE OF EAST ASIAN WINTER MONSOON BY THE METHOD OF FACTOR ANALYSIS:A CASE STUDY OF CORE H07 FROM THE CENTRAL MUD AREA OF THE SOUTH YELLOW SEA

作　　者：冷传旭 袁鸿洁 徐翠玲[1] 郝娅楠[1] 赵广涛[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,青岛266100

出　　处：《海洋地质与第四纪地质》2017年第1期151-161,共11页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金委2014年渤黄海海洋学综合考察实验研究(NORC2014-01)

摘　　要：利用经典统计学分析等传统方法提取东亚季风敏感粒级时,往往因忽视了成分数据的闭合效应而造成对分析结果的误读,所确定的季风替代指标与已有指标的对应效果也不甚理想。以南黄海中部泥质区H07岩心为例,尝试对原始粒度数据做中心化对数比变换以消除闭合效应,再通过因子分析法从中提取出东亚冬季风敏感粒级,进而提出将F2因子得分值作为东亚冬季风强度的替代指标。结合AMS14 C年代数据,重建了近6 200aBP来的东亚冬季风演化历史,并将其划分为5个阶段:(1)6.2~4.99kaBP,高水平强烈波动期;(2)4.99~3.66kaBP,高水平小幅波动期;(3)3.66~0.87kaBP,低水平亚稳定期;(4)0.87~0.14kaBP,持续增强期;(5)0.14kaBP至今,大幅减弱期。所提取的替代指标与其他气候指标有很好的对应,证明将中心化对数比变换引入到季风敏感粒级的提取过程中是可行的,能有效地揭示出更接近于真实的中国东部地区东亚冬季风演化历史。When using traditional classical statistic analysis to extract sensitive grain size of the East Asian monsoon, misunderstandings are often raised due to neglect of closure effect caused by component data; therefore, the correspondence of the proxy and other climate indicators is always unsatisfactory. We take core H07 which is from the central mud area of the South Yellow Sea as the object of this research, and try to use the method of centralized logarithm ratio （clr） transformation for grain size data preprocessing to e- liminate closure effect. Then, the method of factor analysis is applied to extract the sensitive grain size from the transformed data. Further on, we select the factor score as a proxy for the East Asian winter monsoon strength. Combining with AMS14C dating data, East Asian winter monsoon variation over the past 6200 years is reconstructed. The variation of the East Asian monsoon can be divided into five stages： （1）6.2-4.99 kaBP, stage of violent fluctuation in high-level; （2）4.99-3.66 kaBP, stage of slight fluctu- ation in low-level; （3）3.66-0.87 kaBP, stage of metastable in low-level; （4） 0.87-0.14 kaBP, stage of sustained enhancement; （5） 0.14 kaBP up to now, stage of significant weakening. There is a fine corre- spondence between the proxy and other climate indicators, and it is proven that applying the method of clr transformation to sensitive grain size extraction is feasible. This method can effectively reveal the history of East Asian winter monsoon variation in the eastern part of China.

关 键 词：闭合效应 中心化对数比变换 因子分析 东亚冬季风 敏感粒级 南黄海中部泥质区 

分 类 号：P532[天文地球—古生物学与地层学]