Author: Elisa F.Guallart, Early Career Scientist (Instituto Español de Oceanografía)
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The spectrophotometric methodology to determine carbonate ion concentration in seawater was first published in 2008 and has been continuously evolving in terms of reagents and formulations. Although being fast, relatively simple and affordable, it is not widely used in the ocean acidification community neither in time-series observations nor for experimentation. This study uses a merged dataset, from 2009 to 2020, with overdetermined CO<sub>2</sub> measurements to assess the evolution of the methodology for carbonate ion determination through CO<sub>2</sub> system internal consistency analysis and discussion of uncertainty sources. Overall results show that the inconsistencies observed compromise the consistency of datasets between regions and throughout time, pointing to the need for a validated standard operational procedure similar to those proposed for the other CO<sub>2</sub> parameters.
Category: Scientific Program Abstract > Special Sessions > SS84 Ocean acidification: trends and effects from local to regional scales
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Full list of Authors
- Elisa F. Guallart (Instituto Español de Oceanografía (IEO))
- Noelia Fajar (Instituto Español de Oceanografía (IEO))
- Maribel García-Ibáñez (University of East Anglia, School of Environmental Sciences)
- Mónica Castaño-Carrera (Instituto Español de Oceanografía (IEO))
- Rocío Santiago-Domenech (Instituto Español de Oceanografía (IEO))
- Abed El Rahman Hassoun (National Council for Scientific Research in Lebanon (CNRS-L), National Center for Marine Sciences)
- Fiz F. Pérez (Instituto de Investigacións Mariñas (IIM), Consejo Superior de Investigaciones Científicas)
- Regina Easley (Chemical Sciences Division, National Institute of Standards and Technology (NIST))
- Marta Álvarez (Instituto Español de Oceanografía (IEO))
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A DECADE OF SPECTROPHOTOMETRIC CARBONATE ION MEASUREMENTS IN SEAWATER: DEALING WITH INCONSISTENCIES
Category
Scientific Program Abstract > Special Sessions > SS84 Ocean acidification: trends and effects from local to regional scales
Description
Preference: Oral