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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
2019-02-10
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
Volume650Issue:1Pages:470-478
Contribution Rank1
AbstractSedimentary 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.
KeywordApparent fractionation Leaf wax Plant types Sediments Latitude zones
Indexed BySCI ; SCIE
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10953
Collection古环境研究室
Corresponding AuthorLiu, JZ (Liu, Jinzhao)
Affiliation1.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
Recommended Citation
GB/T 7714
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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