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Environmental changes during the Holocene from the pollen records of the Chaohu Lake data set (since 10097 cal. yr BP)
CTR :400
Key words Chaohu,pollen, Holocene
Relevant data On the basis of the analyses of the lake sediment in Chaohu Lake, Holocene environmental changes have been reconstructed in this basin. The Holocene Optimum occurred at 6000-2000 aBP in the Chaohu Lake Basin, showing the best conditions of water and heat, especially 6000-5000 aBP, which reflected the most warm-moist climate condition. Namely, the mixed forest of deciduous broad-leaved trees and evergreen broad-leaved trees occupied most areas of this basin. After around 5000 aBP, the climate and environment changed from warm-moist to relatively warm-dry conditions during the middle Holocene, then temperature and humidity decreased gradually. An obvious drying event occurred in around 2000 aBP, and the Chaohu Lake experienced a large-scale retreat during which the water level reached its lowest level possibly exposing the lakebed. During 2000-1000 aBP, the climate and environment transformed from warm to cool with evident forest shrinkage; this was a climate transitional period which was characterized by the vegetation change. Pollen concentrations of Cyclobalanopsis and Quercus, which were always the constructive species within the forest, decreased rapidly at this time, and the vegetation changed from the mixed forest of deciduous broad-leaved trees and evergreen broad-leaved trees to the grassland with Gramineae as the main components.
Data shows that
a. Description of Intellectual Property Rights When using a dataset, please refer to the following documents in the article: [1]WU Li, WANG Xinyuan, ZHOU Kunshu, et al. Transmutation of ncient settlements and nvironmental changes between 6000-2000 aBP in the Chaohu Lake Basin, East China[J]. Journal of Geographical Sciences, 2010, 20(5): 687-700 [2] Wu Li, Wang Xinyuan, Zhang Guangsheng et al. Vegetation evolution and climate change since the Holocene recorded by pollen-charcoal assemblages from lacustrine sediments of Chaohu Lake in Anhui Province[J]. Journal of Palaeogeography, 2008, 10(2): 183-192 (in Chinese) 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; English Expression: 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. " 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 - Lakes and oceans
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ZhaoHL Email: zhaohl@ieecas.cn
Unit: IEECAS Phone: 029-62336213
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