Biogeosciences
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Articles | Volume 18, issue 15
Articles | Volume 18, issue 15
https://doi.org/10.5194/bg-18-4603-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-4603-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 15
Research article
 | 
12 Aug 2021
Research article |  | 12 Aug 2021

Temporal dynamics of tree xylem water isotopes: in situ monitoring and modeling

Stefan Seeger and Markus Weiler

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Short summary
We developed a setup for fully automated in situ measurements of stable water isotopes in soil and the stems of fully grown trees. We used this setup in a 12-week field campaign to monitor the propagation of a labelling pulse from the soil up to a stem height of 8 m. We could observe trees shifting their main water uptake depths multiple times, depending on water availability. The gained knowledge about the temporal dynamics can help to improve water uptake models and future study designs.
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