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dc.contributor.author
Tuthorn, M.
dc.contributor.author
Zech, R.
dc.contributor.author
Ruppenthal, M.
dc.contributor.author
Oelmann, Y.
dc.contributor.author
Kahmen, A.
dc.contributor.author
del Valle, Hector Francisco
dc.contributor.author
Eglinton, T.
dc.contributor.author
Rozanski, K.
dc.contributor.author
Zech, R.
dc.date.available
2016-05-12T18:40:55Z
dc.date.issued
2015-04
dc.identifier.citation
Tuthorn, M.; Zech, R.; Ruppenthal, M.; Oelmann, Y.; Kahmen, A.; et al.; Coupling δ2H and δ18O biomarker results yields information on relative humidity and isotopic composition of precipitation ? a climate transect validation study; Copernicus Publications; Biogeosciences; 12; 4-2015; 3913-3924
dc.identifier.issn
1726-4170
dc.identifier.uri
http://hdl.handle.net/11336/5636
dc.description.abstract
The hydrogen isotopic composition (δ 2H) of leaf waxes, especially of n-alkanes (δ 2Hn−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 δ 2H values. In order to overcome this limitation, Zech M. et al. (2013) proposed a coupled δ 2Hn−alkane–δ 18Osugar biomarker approach. This coupled approach allows for calculating (i) biomarker-based “reconstructed” δ 2H/δ18O values of leaf water (δ 2H/δ18Oleaf water), (ii) biomarker-based reconstructed deuterium excess (dexcess) of leaf water, which mainly reflects evapotranspirative enrichment and which can be used to reconstruct relative air humidity (RH) and (iii) biomarker-based reconstructed δ 2H/δ18Oprecipitation values. Here we present a climate transect validation study by coupling new results from δ 2H analyses of n-alkanes and fatty acids in topsoils along a climate transect in Argentina with previously measured δ 18O results obtained for plantderived sugars. Accordingly, both the reconstructed RH and δ 2H/δ18Oprecipitation values correlate highly significantly with actual RH and δ 2H/δ18Oprecipitation values. We conclude that compared to single δ 2Hn−alkane or δ 18Osugar records, the proposed coupled δ 2Hn−alkane–δ 18Osugar biomarker approach will allow more robust δ 2H/δ18Oprecipitation reconstructions in future paleoclimate research. Additionally, the proposed coupled δ 2Hn−alkane–δ 18Osugar biomarker approach allows for the establishment of a “paleohygrometer”, more specifically, the reconstruction of mean summer daytime RH changes/history
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Copernicus Publications
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
Isotopic Composition
dc.subject
Climate Transects
dc.subject
Argentina
dc.subject.classification
Ciencias Medioambientales
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Coupling δ2H and δ18O biomarker results yields information on relative humidity and isotopic composition of precipitation ? a climate transect validation study
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-04-28T14:51:11Z
dc.identifier.eissn
1726-4189
dc.journal.number
12
dc.journal.pagination
3913-3924
dc.journal.pais
Alemania
dc.journal.ciudad
Gottingen
dc.description.fil
Fil: Tuthorn, M.. University Of Bayreuth; Alemania
dc.description.fil
Fil: Zech, R.. ETH Zurich. Geological Institute; Suiza
dc.description.fil
Fil: Ruppenthal, M.. University of Tübingen; Alemania
dc.description.fil
Fil: Oelmann, Y.. University of Tübingen; Alemania
dc.description.fil
Fil: Kahmen, A.. University of Basel. Department of Environmental Sciences – Botany; Suiza
dc.description.fil
Fil: del Valle, Hector Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
dc.description.fil
Fil: Eglinton, T.. ETH Zurich. Geological Institute; Suiza
dc.description.fil
Fil: Rozanski, K.. AGH University of Science and Technology. Faculty of Physics and Applied Computer Science; Polonia
dc.description.fil
Fil: Zech, R.. University Of Bayreuth; Alemania. Martin-Luther University. Institute of Agronomy and Nutritional Sciences, Soil Biogeochemistry; Alemania
dc.journal.title
Biogeosciences
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.biogeosciences.net/12/3913/2015/
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-3913-2015
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.5194/bg-12-3913-2015
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