Ocean Science
Ocean Science
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Articles | Volume 21, issue 2
Articles | Volume 21, issue 2
https://doi.org/10.5194/os-21-567-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-21-567-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 2
Technical note
 | 
07 Mar 2025
Technical note |  | 07 Mar 2025

Technical note: Large offsets between different datasets of seawater isotopic composition – an illustration of the need to reinforce intercalibration efforts

Gilles Reverdin, Claire Waelbroeck, Antje H. L. Voelker, and Hanno Meyer

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Short summary
Water isotopes in the ocean trace the freshwater exchanges between the ocean, the atmosphere, and the cryosphere and are used to investigate processes of the hydrological cycle. We illustrate offsets in seawater isotopic composition between different datasets that are larger than the expected variability that one often wants to explore. This highlights the need to share seawater isotopic composition samples dedicated to specific intercomparison of data produced in different laboratories.
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