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Variation of Zr/Rb ratios in the Chinese loess deposits dataset (during the past 1.8 Myr)
CTR :535
Key words Chinese loess,Zr/Rb ratios
Relevant data Most of our knowledge concerning the evolution of the East Asian monsoon (EAM) comes from the Chinese loess-paleosol sequence. Variations in the EAM, as recorded in loess, are highly correlated to the marine δ18O record and show a strong 100 kyr cyclicity during the past 800 kyr. This conclusion is based on both weathering and pedogenesis intensity changes as well as grain size variation in loess-paleosol sequences which usually serves as a proxy for winter monsoon variation. However, grain size distributions are subject to modification by pedogenic processes. In this study we used the Zr/Rb ratio from the Lingtai section on the Loess Plateau in central China to trace variations in the East Asian winter monsoon for the past 1.8 Myr. Long-term Zr/Rb variations in the Lingtai section exhibit a similar amplitude and frequency to those of mean grain size in bulk samples over the past 1.8 Myr. Comparing the Zr/Rb record and mean grain size record between L1 and L9 shows that a good linear relationship exists in the glacial age loess samples, whereas paleosol samples usually deviate from the linear relationship because of intense pedogenesis during the relatively warm and humid interglacial intervals. Our results indicate that the Zr/Rb ratio reflects the original eolian grain size and may serve as a proxy for the strength of the East Asian winter monsoon. In the Lingtai section over the past 1.8 Myr, the Zr/Rb ratio record displays a very strong 41 kyr obliquity periodicity from 1.8-1.2 Myr B.P., implying that variations of the winter monsoon during this interval are controlled by high-latitude climate. However, during the past 0.8 Myr the Zr/Rb ratio exhibits a stronger precession cycle influence, suggesting a possible low-latitude control on the East Asian monsoon regime during this interval.
Data shows that
a. Description of Intellectual Property Rights When using a dataset, please refer to the following documents in the article: Lianwen Liu, Jun Chen, Junfeng Ji, et al. Variation of Zr/Rb ratios in the Chinese loess deposits during the past 1.8 Myr and its implication for the change of East Asian monsoon intensity[J]. Geochemistry Geophysics Geosystems, 2006, 7(10): 1-9 b. The data labels refer to the following specifications: In order to respect intellectual property rights and protect the rights and interests of data contributors and service providers, data users are requested to mark the data sources in the research results (including project evaluation reports, acceptance reports, academic papers and graduation thesis) based on this data, and the references cited in the [Citation Reference], and submit the publicly available results to the "National Earth System Science Data Sharing Platform" Data sources refer to the following specifications: Chinese Expression: 国家科技基础条件平台-国家地球系统科学数据共享平台-东亚古环境科学数据库; English Expression: East Asian Paleoenvironmental Science Database, National Earth System Science Data Sharing Infrastructure, National Science & Technology Infrastructure of China Acknowledgments refer to the following specifications: Acknowledgments in Chinese: 感谢国家科技基础条件平台-国家地球系统科学数据共享平台-东亚古环境科学数据库提供数据支撑。 Acknowledgments in English: Acknowledgement for the data support from " National Earth System Science Data Sharing Infrastructure, National Science & Technology Infrastructure of China, East Asian Paleoenvironmental Science Database. " Iegal liability: The platform owns intellectual property rights protected by the law, including copyrights for all the data products or services and relevant information published by the platform itself or contributed by some data contributors. No unit or individual may copy, modify, transcribing, spread or sell any part of the above data products, services, information or materials in any way or reason without the written permission of this platform. Where the infringement of copyright and other intellectual property rights of the platform, the platform will be held accountable according to law, hereby solemnly declare! c. Contacts Name: Data processing group Email: eapsd@ieecas.cn Tel: 029-62336213
Data collection format Excel
Data classification Geological record - Terrestrial environmental records
Data source
East Asian Paleoenvironmental Science Database
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Full name: 
ZhaoHL Email: zhaohl@ieecas.cn
Unit: IEECAS Phone: 029-62336213
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