The Paleogeomagnetic Intensity Variation from 10Be Record in Chinese Loess
详细信息
- 责任者：Du Yajuan (State Key Laboratory of Loess and Quaternary Geology ; Institute of Earth Environment ; Chinese Academy of Science ; Xi’an 710075 ; China) ; Zhou Weijian
- 刊名：Earth Science
- 出版年：2013
- 卷期：38(3)
- 关键词：黄土 ; loess ; 古地磁 ; paleomagnetism ; 中国 ; China
- 页码：p.482-488
- 图表：illus., 1 table, 25 refs.
- 分类号：1400
- issnNo：ISSN1000-2383
- isbnNo：CN42-1233/P
摘要
The 10Be records in Chinese loess can’t be used for tracing the paleogeomagnetic change because of the significant climate effect,so we need to do research on signal separation.The difficulties are summarized in the reconstruction of the paleogeomagnetic intensity by using the 10Be records in Chinese loess in this paper.Here we present the advantages and shortcomings in our methods used to separate climate effects and geomagnetic modulation effects from 10Be concentration.Based on these methods,principal component analysis(PCA)is used to extract the common signal of 10Be from Luochuan and Xifeng loess sections to further clear up the effect of the climate change,noise and other random signals,which we interpret as variations of the global 10Be production rate of the past 130 ka.The PCA method presented here may be facilitated to solve the difficulties in geological or other signal separation.
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