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MEASUREMENT OF Be-10 CONCENTRATION OF MODERN FALLING DUST IN NORTHERN CHINA
Xian, F (Xian, Feng)[1,2]; Zhou, WJ (Zhou, Weijian)[1,2,4]; Kong, XH (Kong, Xianghui)[1,2]; Jiang, J (Jiang, Jun)[5]; Wu, ZK (Wu, Zhenkun)[1,2]; Chen, N (Chen, Ning)[1,2]; Zhao, GQ (Zhao, Guoqing)[1,2]
2012-09-01
Source PublicationRADIOCARBON
Volume54Issue:1Pages:37-43
Subtype期刊论文
Abstract

Paleoenvironmental and paleogeomagnetic tracing studies from Chinese loess Be-10 have progressed in recent years (Zhou et al. 2007a,b, 2010). In this approach, Be-10 flux determined from sediment concentration and accumulation rate may be used to recover information about paleomonsoon rainfall rates as well as past variations in the geomagnetic field strength. However, these methods require that a correction be made for residual undecayed Be-10 in remobilized dust. To better understand the feature of the Be-10 signals related to the remobilized dust, we report the first observational study on Be-10 concentration of modern falling dust using the 3MV multi-element accelerator mass spectrometer (AMS) in the Xi'an AMS Center. Ten samples collected at Ansai observation station (109 degrees 19'E, 36 degrees 51'N) in northern China from May 2008 to June 2009 are measured along with 3 chemical blanks. The results clearly show that the Be-10 content of modern falling dust is relatively uniform, with a mean value of 1.21 x 10(8) atoms/g, a measurement similar to that of Chinese loess (Zhou et al. 2007a) and to the value found in the study by Shen et al. (2009) on dust Be-10 falling near Dingbian, China (1.25 +/- 0.06 x 10(8) atoms/g). Despite the fact that modern dust flux is much higher in spring relative to summer in northern China, Be-10 concentration in falling dust remains fairly constant. In addition, we find that dust Be-10 concentration is roughly independent of the local precipitation changes. This feature might be considered as an analogue to improve our understanding on the fundamental information of the source component contained in loess Be-10 records and its spatial/temporal distribution features.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10120
Collection加速器质谱中心
Corresponding AuthorXian, F (Xian, Feng)[1,2]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, No.10 Fenghui South Road, Hi-Tech Zone, Xi’an 710075, China;
2.Xi’an AMS Center, No. 99 Yanxiang Road, Yanta District, Xi’an 710052, China;
3.School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, No. 26 Xianning West Road, Beilin District, Xi’an 710049, China;
4.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, No. 26 XinongRoad, Yang Ling 712100, China
Recommended Citation
GB/T 7714
Xian, F ,Zhou, WJ ,Kong, XH ,et al. MEASUREMENT OF Be-10 CONCENTRATION OF MODERN FALLING DUST IN NORTHERN CHINA[J]. RADIOCARBON,2012,54(1):37-43.
APA Xian, F .,Zhou, WJ .,Kong, XH .,Jiang, J .,Wu, ZK .,...&Zhao, GQ .(2012).MEASUREMENT OF Be-10 CONCENTRATION OF MODERN FALLING DUST IN NORTHERN CHINA.RADIOCARBON,54(1),37-43.
MLA Xian, F ,et al."MEASUREMENT OF Be-10 CONCENTRATION OF MODERN FALLING DUST IN NORTHERN CHINA".RADIOCARBON 54.1(2012):37-43.
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