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

Alexandre, Anne; Webb, Elizabeth; Landais, Amaelle; Piel, Clément; Devidal, Sébastien; Sonzogni, Corinne; Couapel, Martine; Mazur, Jean-Charles; Pierre, Monique; Prié, Frédéric; Vallet-Coulomb, Christine; Outrequin, Clément; Roy, Jacques

doi:https://doi.org/10.5194/bg-16-4613-2019

Articles | Volume 16, issue 23

https://doi.org/10.5194/bg-16-4613-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-16-4613-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 23

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, Elizabeth Webb, Amaelle Landais, Clément Piel, Sébastien Devidal, Corinne Sonzogni, Martine Couapel, Jean-Charles Mazur, Monique Pierre, Frédéric Prié, Christine Vallet-Coulomb, Clément Outrequin, and Jacques Roy

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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'review', Anonymous Referee #1, 24 Apr 2019
- AC1: 'Reply to comments+ revised draft', Anne Alexandre, 03 Jul 2019
RC2: 'review #2', Daniel Herwartz, 23 Jul 2019
- AC2: 'Answer to Reviewer 2', Anne Alexandre, 06 Sep 2019

Peer-review completion

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.