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BG | Articles | Volume 16, issue 23
Biogeosciences, 16, 4613–4625, 2019
https://doi.org/10.5194/bg-16-4613-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 16, 4613–4625, 2019
https://doi.org/10.5194/bg-16-4613-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

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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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (25 Sep 2019) by Christopher Still
AR by Anne Alexandre on behalf of the Authors (04 Oct 2019)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (16 Oct 2019) by Christopher Still
RR by Anonymous Referee #1 (21 Oct 2019)
ED: Publish as is (05 Nov 2019) by Christopher Still
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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.
This calibration study shows that despite isotope heterogeneity along grass leaves, the triple...
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