Calibrating branched GDGTs in bones to temperature and precipitation: Application to Alaska chronological sequences

doi:10.1016/j.quascirev.2020.106371

	Calibrating branched GDGTs in bones to temperature and precipitation: Application to Alaska chronological sequences
	Zhao, Jiaju 1,2; Huang, Yongsong 1,3; Yao, Yuan 1,2; An, Zhisheng 1,2; Zhu, Yizhi 1; Lu, Hongxuan 1,2; Wang, Zheng 1,2
刊名	QUATERNARY SCIENCE REVIEWS
	2020-07-15
卷号	240 页码:12
关键词	Branched GDGTs Paleoclimate Temperature proxy Precipitation proxy Animal bone Alaska
ISSN号	0277-3791
DOI	10.1016/j.quascirev.2020.106371
通讯作者	Huang, Yongsong(yongsong_huang@brown.edu)
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.
资助项目	National Natural Science Foundation of China[41573113] ; National Natural Science Foundation of China[41602193] ; National Natural Science Foundation of China[41702187] ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment of the Chinese Academy of Sciences[SKLLQGPY1704] ; U.S. National Science Foundation[ATM-0902805] ; U.S. National Science Foundation[EAR-1122749] ; U.S. National Science Foundation[PLR-1503846] ; U.S. National Science Foundation[EAR-1502455] ; U.S. National Science Foundation[EAR-1762431]
WOS关键词	DIALKYL GLYCEROL TETRAETHERS ; LAST GLACIAL MAXIMUM ; HOLOCENE CLIMATE ; MEMBRANE-LIPIDS ; TIBETAN PLATEAU ; SOILS ; PROXY ; LAKE ; RECONSTRUCTIONS ; PALEOCLIMATE
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000546906200011
资助机构	National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment of the Chinese Academy of Sciences ; U.S. National Science Foundation
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15001]
专题	地球环境研究所_古环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Huang, Yongsong
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 3.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]. QUATERNARY SCIENCE REVIEWS,2020,240:12.
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,240,12.
MLA	Zhao, Jiaju,et al."Calibrating branched GDGTs in bones to temperature and precipitation: Application to Alaska chronological sequences".QUATERNARY SCIENCE REVIEWS 240(2020):12.