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| Titel |
Deuterium in tree rings: a low frequency climate proxy? - Hope for deuterium in tree rings? |
| VerfasserIn |
S. Hangartner, A. Kress, M. Sauer, M. Leuenberger |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250022739
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| Zusammenfassung |
| We measured stable hydrogen isotope ratios in α-cellulose from a millennial European larch
(Larix decidua) chronology from a subalpine valley in Valais, Switzerland. The online
equilibration method described in [1] was applied to measure the Deuterium/Hydrogen ratio
(δD) of the non–exchangeable hydrogen. We compared the δD chronology to the results from
δ18O measurements of the same cellulose samples [2]. Although both hydrogen and oxygen
share a highly similar long term trend, high frequency signals show low coherence. This
results are in contrast to the mechanistic model by [3] who assumes a similar pathway for
hydrogen and oxygen in woody plants from source water to cellulose synthesis. The
comparison of our δD chronology to high resolution instrumental meteo data also leads
to conflicting results. In this work we thus focused on low frequencies in δD to
investigate the question whether deuterium in tree rings is a worthwhile climate
proxy.
References
[1]Â Â Â Filot, M. (2006), Rapid Commun. Mass Spectrom.
[2]Â Â Â Kress, A. et al. (2009, in press), Oecologia.
[3]Â Â Â Roden, J.S. (2000), Geochimica et Cosmochimica Acta. |
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