Coupling δ2H and δ18O biomarker results yields information on relative humidity and isotopic composition of precipitation – a climate transect validation study
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 3342698
Author(s) Tuthorn, Mario; Zechner, Rudolf; Ruppenthal, Marc; Oelmann, Yvonne; Kahmen, Ansgar; del Valle , H. F.; Eglinton, T.; Rozanski, K.
Author(s) at UniBasel Kahmen, Ansgar
Year 2015
Title Coupling δ2H and δ18O biomarker results yields information on relative humidity and isotopic composition of precipitation – a climate transect validation study
Journal Biogeosciences
Volume 12
Number 12
Pages / Article-Number 3913-3924
Abstract

The hydrogen isotopic composition (δ2H) of leaf waxes, especially of n-alkanes (δ2Hn-alkanes), is increasingly used for paleohydrological and paleoclimate reconstructions. However, it is challenging to disentangle past changes in the isotopic composition of precipitation and changes in evapotranspirative enrichment of leaf water, which are both recorded in leaf wax δ2H values. In order to overcome this limitation, Zech M. et al. (2013) proposed a coupled δ2Hn-alkanes–δ18Osugar biomarker approach. This coupled approach allows for calculating (i) biomarker-based "reconstructed" δ2Hδ18O values of leaf water (δ2Hδ18Oleaf water), (ii) biomarker-based reconstructed deuterium excess (d-excess) of leaf water, which mainly reflects evapotranspirative enrichment and which can be used to reconstruct relative air humidity (RH) and (iii) biomarker-based reconstructed δ2Hδ18Oprecipitation values.

Publisher European Geosciences Union (EGU)
ISSN/ISBN 1726-4189
URL http://www.biogeosciences.net/12/3913/2015/bg-12-3913-2015.html
edoc-URL http://edoc.unibas.ch/40145/
Full Text on edoc No
Digital Object Identifier DOI 10.5194/bg-12-3913-2015
ISI-Number WOS:000357119000018
Document type (ISI) Article
 
   

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