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Biogeosciences An interactive open-access journal of the European Geosciences Union
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This calibration study shows that despite isotope heterogeneity along grass leaves, the triple oxygen isotope composition of bulk leaf phytoliths can be estimated from the Craig and Gordon model, a mixing equation and a mean leaf water–phytolith fractionation exponent (lambda) of 0.521. The results strengthen the reliability of the 17O–excess of phytoliths to be used as a proxy of atmospheric relative humidity and open tracks for its use as an imprint of leaf water 17O–excess.
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BG | Articles | Volume 16, issue 23
Biogeosciences, 16, 4613–4625, 2019
https://doi.org/10.5194/bg-16-4613-2019
Biogeosciences, 16, 4613–4625, 2019
https://doi.org/10.5194/bg-16-4613-2019

Research article 05 Dec 2019

Research article | 05 Dec 2019

Effects of leaf length and development stage on the triple oxygen isotope signature of grass leaf water and phytoliths: insights for a proxy of continental atmospheric humidity

Anne Alexandre et al.

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Latest update: 22 Jan 2021
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The requested paper has a corresponding corrigendum published. Please read the corrigendum first before downloading the article.

Short summary
This calibration study shows that despite isotope heterogeneity along grass leaves, the triple oxygen isotope composition of bulk leaf phytoliths can be estimated from the Craig and Gordon model, a mixing equation and a mean leaf water–phytolith fractionation exponent (lambda) of 0.521. The results strengthen the reliability of the 17O–excess of phytoliths to be used as a proxy of atmospheric relative humidity and open tracks for its use as an imprint of leaf water 17O–excess.
Citation
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Final-revised paper
Preprint