ITPCAS OpenIR  > 图书馆
Hydrogen isotope ratios of terrestrial leaf wax n-alkanes from the Tibetan Plateau: Controls on apparent enrichment factors, effect of vapor sources and implication for altimetry
Zhang, XL (Zhang, Xiaolong)1,2; Xu, BQ (Xu, Baiqing)1,3; Gunther, F (Guenther, Franziska)4,5; Mugler, I (Muegler, Ines)4,6; Lange, M (Lange, Markus)4; Zhao, HB (Zhao, Huabiao)1,3; Li, JL (Li, Jiule)1; Gleixner, G (Gleixner, Gerd)4; Gleixner, G
Source PublicationGEOCHIMICA ET COSMOCHIMICA ACTA
2017
Volume211Issue:0Pages:10-27
DOI10.1016/j.gca.2017.04.035
AbstractEmpirical evidence suggested that the altitudinal dependence of hydrogen isotope ratios of leaf wax n-alkanes (dDwax) can be used to estimate paleoaltitudinal changes. However, the application of delta D-wax-based paleoaltimetry remains difficult, as the impacts of evaporative, transpirative and biosynthetic processes on hydrogen isotope fractionations in changing environments and the influence of likely changing water vapor sources are not well explored. For this study, we sampled stream waters, soils and plant leaves along two transects spanning large gradients of altitude, precipitation amount, vapor source, temperature and vegetation type on the Tibetan Plateau (TP). delta D values of stream water (as an approximation for delta D-p), soil water (delta D-sw) and plant leaf water (delta D-lw) as well as leaf wax n-alkanes were measured in order to quantify isotopic fractionations in the formation of leaf waxes.
Most interestingly, we found a strong negative correlation between the evapotranspirative enrichment of leaf water against precipitation (epsilon(lw-p)), which combines the effects of soil evaporation and leaf transpiration, and the biosynthetic hydrogen isotope fractionation (epsilon(wax-lw)), which describes isotopic enrichment between leaf wax and leaf water. The relationship yields a steady apparent isotopic enrichment factor (epsilon(wax-p)) between leaf wax and precipitation, which is independent from climatic parameters and has an average value of -107 +/- 26% for grasses (monocotyledons) and -77 +/- 22% for trees (dicotyledons). Since the terrestrial n-alkanes, especially n-C27 and n-C29, in sediments are derived from trees and grasses, the likely change of the vegetation type in the uplift of mountains can change the isotopic estimates by about +/- 30%, which corresponds to an altitudinal change of +/- 1600 m. We, therefore, suggest that hydrogen isotope ratio of sedimentary n-C-31 alkane, which is mainly derived from grasses might be better proxies to reconstruct paleoaltitudes.
Our large dataset of delta D-wax from trees and grasses that aimed to mirror the variability of environmental factors over geological time frames showed the lapse rates were significant, but much smaller than in previous studies. Most importantly our result demonstrated that the lapse rate significantly differed for both transects (p = 0.0068), i. e. 0.87 +/- 0.71%/100 m (R-2 = 0.28, p = 0.2841, n = 6) and 2.28 +/- 0.82%/100 m (R-2 = 0.34, p = 0.0135, n = 17) for Indian monsoon and Westerly dominated areas, respectively. This suggests that different moisture sources might strongly affected the observed lapse rates. In consequences altitude reconstructions are strongly complicated in areas with likely changing air masses like the Tibetan Plateau. (C) 2017 Elsevier Ltd. All rights reserved.
Subject Area自然地理学
WOS IDWOS:000405786800002
Language英语
Indexed BySCI
KeywordDelta-d Values Western Central-africa Stable-isotopes Organic-matter D/h Ratios Plants Implications Lipid Biosynthesis Surrounding Area Aquatic Plants Central Andes
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics ; Geochemistry & Geophysics
Cooperation Status国际
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8005
Collection图书馆
Corresponding AuthorGleixner, G
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China.
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
4.Max Planck Inst Biogeochem, POB 100164, D-07701 Jena, Germany.
5.Leibniz Ctr Trop Marine Res, Fahrenheitstr 6, D-28359 Bremen, Germany.
6.Univ Hamburg, Mittelweg 177, D-20148 Hamburg, Germany.
Recommended Citation
GB/T 7714
Zhang, XL ,Xu, BQ ,Gunther, F ,et al. Hydrogen isotope ratios of terrestrial leaf wax n-alkanes from the Tibetan Plateau: Controls on apparent enrichment factors, effect of vapor sources and implication for altimetry[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2017,211(0):10-27.
APA Zhang, XL .,Xu, BQ .,Gunther, F .,Mugler, I .,Lange, M .,...&Gleixner, G.(2017).Hydrogen isotope ratios of terrestrial leaf wax n-alkanes from the Tibetan Plateau: Controls on apparent enrichment factors, effect of vapor sources and implication for altimetry.GEOCHIMICA ET COSMOCHIMICA ACTA,211(0),10-27.
MLA Zhang, XL ,et al."Hydrogen isotope ratios of terrestrial leaf wax n-alkanes from the Tibetan Plateau: Controls on apparent enrichment factors, effect of vapor sources and implication for altimetry".GEOCHIMICA ET COSMOCHIMICA ACTA 211.0(2017):10-27.
Files in This Item:
File Name/Size DocType Version Access License
V.211 10-27 2017.pdf(3971KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhang, XL (Zhang, Xiaolong)]'s Articles
[Xu, BQ (Xu, Baiqing)]'s Articles
[Gunther, F (Guenther, Franziska)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhang, XL (Zhang, Xiaolong)]'s Articles
[Xu, BQ (Xu, Baiqing)]'s Articles
[Gunther, F (Guenther, Franziska)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhang, XL (Zhang, Xiaolong)]'s Articles
[Xu, BQ (Xu, Baiqing)]'s Articles
[Gunther, F (Guenther, Franziska)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: V.211 10-27 2017.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.