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Variations in hydrogen isotopic fractionation in higher plants and sediments across different latitudes: Implications for paleohydrological reconstruction
Liu, JZ (Liu, Jinzhao)1,2; An, ZS (An, Zhisheng)1
通讯作者Liu, Jinzhao(liu.jin.zhao.am@stu.xjtu.edu.cn)
2019-02-10
发表期刊SCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
卷号650期号:1页码:470-478
产权排序1
摘要Sedimentary delta Dn-alkane value is widely utilized as a reliable proxy for paleo-hydrological reconstruction. Applications of this proxy must be based upon a globally clear understanding of the relationship between leaf wax dDn-alkane values and precipitation delta D(delta D-p), defined as apparent fractionation (epsilon(app)). However, there is a critical concern about whether relatively constant epsilon(app) values exist across different latitudes. In this study, we systematically analyzed the variations of available epsilon(app) with latitudes based upon two compiled-new databases of higher plants and sediments over the world. We found that the total average eapp was relatively constant, i.e., -116 +/- 5% (n = 941), in higher plants across different latitudes without consideration of plant types (e.g., dicots, monocots, gymnosperms), and was still constant but slightly lower average eapp, i. e., -125 +/- 6% (n = 460), in sediments across the latitudes. The slightly lower average eapp in sediments relative to higher plants probably derived from the contribution of aquatic plants with isotopically D-depleted eapp in lake sediments. Interestingly, with consideration of plant types, average eapp increased in dicots but decreased inmonocots slightly from low to high latitudes. The counteraction of these competing trends generates relatively constant average eapp values in higher plants, and resultantly constant average eapp values occur in sediments at the global scale. It is important to elaborate relatively constant eapp values from higher plants and sediments across different latitudes when sedimentary delta Dn-alkane is utilized as a proxy for paleohydrological reconstruction.
关键词Apparent fractionation Leaf wax Plant types Sediments Latitude zones
DOI10.1016/j.scitotenv.2018.09.047
关键词[WOS]DELTA-D VALUES ; WAX N-ALKANES ; WESTERN CENTRAL-AFRICA ; LEAF-WAXES ; D/H RATIOS ; LACUSTRINE SEDIMENTS ; TERRESTRIAL PLANTS ; TIBETAN PLATEAU ; LIPID BIOSYNTHESIS ; AQUATIC PLANTS
收录类别SCI ; SCIE
语种英语
资助项目Chinese Academy of Sciences[QYZDY-SSW-DQC001] ; National Natural Science Foundation of China[41420104008]
WOS研究方向Environmental Sciences & Ecology
项目资助者Chinese Academy of Sciences ; National Natural Science Foundation of China
WOS类目Environmental Sciences
WOS记录号WOS:000447092700049
出版者ELSEVIER SCIENCE BV
引用统计
被引频次:27[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10953
专题古环境研究室
通讯作者Liu, JZ (Liu, Jinzhao)
作者单位1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China;
2.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China
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Liu, JZ ,An, ZS . Variations in hydrogen isotopic fractionation in higher plants and sediments across different latitudes: Implications for paleohydrological reconstruction[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,650(1):470-478.
APA Liu, JZ ,&An, ZS .(2019).Variations in hydrogen isotopic fractionation in higher plants and sediments across different latitudes: Implications for paleohydrological reconstruction.SCIENCE OF THE TOTAL ENVIRONMENT,650(1),470-478.
MLA Liu, JZ ,et al."Variations in hydrogen isotopic fractionation in higher plants and sediments across different latitudes: Implications for paleohydrological reconstruction".SCIENCE OF THE TOTAL ENVIRONMENT 650.1(2019):470-478.
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