干旱区生态环境知识资源中心(Arid): Branched tetraether lipids in Chinese soils: Evaluating the fidelity of MBT/CBT proxies as paleoenvironmental proxies

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	Branched tetraether lipids in Chinese soils: Evaluating the fidelity of MBT/CBT proxies as paleoenvironmental proxies
	Zheng Fengfeng; Zhang Chuanlun; Chen Yufei; Li Fuyan; Ma Cenling; Pu Yang; Zhu Yuanqing; Wang Yongli; Liu Weiguo
来源期刊	Science China. Earth Sciences
ISSN	1674-7313
出版年	2016
卷号	59 期号:7 页码:1353-1367
英文摘要	The ubiquitous occurrence of branched glycerol dialkyl glycerol tetraethers(brGDGTs) in soils has allowed development of new proxies for reconstruction of past climate and environment. The methylation and cyclization degrees of brGDGTs, expressed as MBT and CBT, respectively, are reported to be mainly controlled by mean annual air temperature(MAAT) and soil pH. However, the brGDGT-derived temperatures and soil pH scatter widely when data from different environmental conditions are considered. In this study, we collected over 300 soil samples from China, which are representative of humid(Xishuangbanna, Guangzhou, and Shanghai), semi-arid(Dongying) and semi-arid/arid(Lanzhou, Tibetan Plateau) regions. Collectively we have the most extensive dataset that broadly characterizes the distribution of brGDGTs according to climate zones in China. The overall data demonstrate that the MBT/CBT derived temperatures better match the measured MAATs in humid and non-alkaline regions than those from regions of low MAP(<400 mm/yr) and above neutral soil pH(>7.0-7.5). Similarly, CBT describes soil pH much better in humid and non-alkaline soils than in semi-arid/arid and alkaline soils; the semi-arid/arid and alkaline soils tend to show a positive correlation between soil pH and CBT, which contradicts that in the humid and non-alkaline soils. While soil pH, MAAT and mean annual precipitation(MAP) are dominating factors controlling the brGDGT distribution across all climate zones, conductivity, total organic carbon and total nitrogen, as well as soil water content can also play an important role locally. Removing brGDGT-II resulted in a revised CBT index that provides more accurate estimation of pH, especially in semi-arid/arid and alkaline soils. The overall Chinese dataset demonstrates that continental air temperature derived from brGDGT-proxies can vastly deviate from real measurements and should be used with extreme caution in paleo-climate or -environment studies.
英文关键词	brGDGTs MAAT Soil pH MAP Chinese soils Tibetan Plateau Chinese Loess Plateau
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5757529
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335691
作者单位	Zheng Fengfeng, Tongji University, State Key Laboratory of Marine Geology, Shanghai 200092, China.; Zhang Chuanlun, Tongji University, State Key Laboratory of Marine Geology, Shanghai 200092, China.; Chen Yufei, Tongji University, State Key Laboratory of Marine Geology, Shanghai 200092, China.; Li Fuyan, Tongji University, State Key Laboratory of Marine Geology, Shanghai 200092, China.; Ma Cenling, Tongji University, State Key Laboratory of Marine Geology, Shanghai 200092, China.; Zhu Yuanqing, Tongji University, State Key Laboratory of Marine Geology, Shanghai 200092, China.; Pu Yang, School of Geography and Remote Sensing, Nanjing University of Information Science & Technology, Nanjing, Jiangsu 210044, China.; Wang Yongli, Institute of Geology and Geophysics, Chinese Academy of Sciences, Key Laboratory of Gas Geochemistry, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Liu Weiguo, Institute of Earth Environment, Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geolo...
推荐引用方式 GB/T 7714	Zheng Fengfeng,Zhang Chuanlun,Chen Yufei,et al. Branched tetraether lipids in Chinese soils: Evaluating the fidelity of MBT/CBT proxies as paleoenvironmental proxies[J],2016,59(7):1353-1367.
APA	Zheng Fengfeng.,Zhang Chuanlun.,Chen Yufei.,Li Fuyan.,Ma Cenling.,...&Liu Weiguo.(2016).Branched tetraether lipids in Chinese soils: Evaluating the fidelity of MBT/CBT proxies as paleoenvironmental proxies.Science China. Earth Sciences,59(7),1353-1367.
MLA	Zheng Fengfeng,et al."Branched tetraether lipids in Chinese soils: Evaluating the fidelity of MBT/CBT proxies as paleoenvironmental proxies".Science China. Earth Sciences 59.7(2016):1353-1367.