Effect of water depth on the TEX86 proxy in volcanic lakes of northeastern China

doi:10.1016/j.orggeochem.2019.01.014

	Effect of water depth on the TEX86 proxy in volcanic lakes of northeastern China
	Yao, Yuan 1,3; Zhao, Jiaju 3; Bauersachs, Thorsten 2; Huang, Yongsong 1,3
刊名	ORGANIC GEOCHEMISTRY
	2019-03-01
卷号	129 页码:88-98
关键词	Isoprenoid GDGTs TEX86 Water depth Volcanic lakes Lake level
ISSN号	0146-6380
DOI	10.1016/j.orggeochem.2019.01.014
通讯作者	Huang, Yongsong(yongsong_huang@brown.edu)
英文摘要	The TEX(86 )index, based on the distribution of isoprenoid glycerol dialkyl glycerol tetraethers (iGDGTs), has been widely applied for reconstructing past sea surface temperature (SST). However, its successful application in lacustrine environments has been limited to certain large lakes in which aquatic Thaumarchaeota are thought be the dominant iGDGT producers. In small lakes, multiple factors, such as iGDGTs from soil and non-thaumarchaeotal sources, could complicate the use of TEX86 as a temperature proxy (Powers et al., 2010). Here we investigate iGDGTs from surface sediments and suspended particulate matter (SPM) in a series of small volcanic lakes (areas: similar to 0.1-8.2 km(2)) from three main volcanic fields of northeastern China. The iGDGT distribution patterns from surface sediments of these lakes differ significantly from those of surrounding soils, global marine sediments, as well as cultured Group I.1 a and Group I.1b Thaumarchaeota, suggesting a substantial contribution of autochthonous non-thaumarchaeotal sources. Interestingly, however, the correlation between TEX86 values in the SPM samples and in situ water temperatures remain strong and display temperature sensitivity similar to previously published linear calibrations from global marine and lake sediments. Our results suggest that the in situ TEX86-temperature relationship is little affected by the non-thaumarchaeotal iGDGT sources in these lakes. However, the TEX86-inferred temperatures from surface sediments show increasingly colder offsets relative to air temperatures with increasing lake depth, which can be explained by the observed increase in iGDGTs production and decrease in water temperatures in water column as depth increases. Our results thus suggest that TEX86 values in the sediments of these volcanic lakes are affected by both temperature and lake depth, and when temperature can be constrained independently or remains constant over a given period of time, have potential application as a lake level proxy in deep volcanic lakes. (C) 2019 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[41573113] ; National Natural Science Foundation of China[41702187] ; National Natural Science Foundation of China[41602193] ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences[SKLLQGPY1704] ; U.S. National Science Foundation[EAR-1122749] ; U.S. National Science Foundation[PLR-1503846] ; U.S. National Science Foundation[EAR-1502455]
WOS关键词	GLYCEROL TETRAETHER LIPIDS ; SEA-SURFACE TEMPERATURES ; MEMBRANE-LIPIDS ; ARCHAEAL LIPIDS ; ETHER LIPIDS ; INTACT POLAR ; TIBETAN PLATEAU ; MAAR LAKE ; NE CHINA ; MARINE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000460896700008
资助机构	National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; U.S. National Science Foundation
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/14250]
专题	地球环境研究所_加速器质谱中心
通讯作者	Huang, Yongsong
作者单位	1.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA 2.Univ Kiel, Inst Geosci, Dept Organ Geochem, D-24118 Kiel, Germany 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Yao, Yuan,Zhao, Jiaju,Bauersachs, Thorsten,et al. Effect of water depth on the TEX86 proxy in volcanic lakes of northeastern China[J]. ORGANIC GEOCHEMISTRY,2019,129:88-98.
APA	Yao, Yuan,Zhao, Jiaju,Bauersachs, Thorsten,&Huang, Yongsong.(2019).Effect of water depth on the TEX86 proxy in volcanic lakes of northeastern China.ORGANIC GEOCHEMISTRY,129,88-98.
MLA	Yao, Yuan,et al."Effect of water depth on the TEX86 proxy in volcanic lakes of northeastern China".ORGANIC GEOCHEMISTRY 129(2019):88-98.