干旱区生态环境知识资源中心(Arid): Calibrating branched GDGTs in bones to temperature and precipitation: Application to Alaska chronological sequences

Arid

DOI	10.1016/j.quascirev.2020.106371
	Calibrating branched GDGTs in bones to temperature and precipitation: Application to Alaska chronological sequences
	Zhao, Jiaju; Huang, Yongsong; Yao, Yuan; An, Zhisheng; Zhu, Yizhi; Lu, Hongxuan; Wang, Zheng
通讯作者	Huang, YS
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
出版年	2020
卷号	240
英文摘要	Our recent study suggests that branched glycerol dialkyl glycerol tetraethers (brGDGTs) in ancient bones may have great potential for reconstructing in-situ paleoclimate conditions. However, one major problem with reconstructing past climate and environmental conditions using brGDGTs in ancient bones is the lack of calibrations specific to bones. Here we investigate the distribution of brGDGTs in 191 modern weathered bone samples in China with a broad range of mean annual air temperature (MAAT: -3.3-25.6 degrees C) and mean annual precipitation (MAP: 163-2062 mm), and present the first bone-specific brGDGT temperature and precipitation calibrations. We find that the best correlation with temperature is found in bones with a higher ratio of 6-methyl over 5-methyl brGDGT isomers, suggesting a preferential production of 6-methyl brGDGTs by bacteria inside bones. The bone-specific temperature relationship is distinct from published mineral soil calibrations (e.g., with virtually no influence from soil pH changes). We hypothesize that the lower calibration residual values result from more homogenous and semi-closed environment for bacterial growth inside the bones than soil environments. We also demonstrate that, in semi-arid and semi-humid regions (MAP: 200-710 mm), brGDGT distributions in cancellous bones with relatively high percentages of 6-methyl isomers are strongly correlated with mean annual precipitation. Application of our bone-specific brGDGT calibrations to Alaskan chronological sequences yields new insights to high latitude temperature and precipitation variations for the past 30,000 years. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	Branched GDGTs Paleoclimate Temperature proxy Precipitation proxy Animal bone Alaska
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000546906200011
WOS关键词	DIALKYL GLYCEROL TETRAETHERS ; LAST GLACIAL MAXIMUM ; HOLOCENE CLIMATE ; MEMBRANE-LIPIDS ; TIBETAN PLATEAU ; SOILS ; PROXY ; LAKE ; RECONSTRUCTIONS ; PALEOCLIMATE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	中国科学院地球环境研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324983
作者单位	[Zhao, Jiaju; Huang, Yongsong; Yao, Yuan; An, Zhisheng; Zhu, Yizhi; Lu, Hongxuan; Wang, Zheng] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China; [Zhao, Jiaju; Yao, Yuan; An, Zhisheng; Lu, Hongxuan; Wang, Zheng] CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China; [Huang, Yongsong] Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA
推荐引用方式 GB/T 7714	Zhao, Jiaju,Huang, Yongsong,Yao, Yuan,et al. Calibrating branched GDGTs in bones to temperature and precipitation: Application to Alaska chronological sequences[J]. 中国科学院地球环境研究所,2020,240.
APA	Zhao, Jiaju.,Huang, Yongsong.,Yao, Yuan.,An, Zhisheng.,Zhu, Yizhi.,...&Wang, Zheng.(2020).Calibrating branched GDGTs in bones to temperature and precipitation: Application to Alaska chronological sequences.QUATERNARY SCIENCE REVIEWS,240.
MLA	Zhao, Jiaju,et al."Calibrating branched GDGTs in bones to temperature and precipitation: Application to Alaska chronological sequences".QUATERNARY SCIENCE REVIEWS 240(2020).