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Título: | Spectrophotometric Measurement of Carbonate Ion in Seawater over a Decade: Dealing with Inconsistencies |
Autor: | Fernández-Guallart, E. CSIC ORCID; Fajar, Noelia CSIC ORCID CVN; García-Ibáñez, Maribel I. CSIC ORCID ; Castaño, Mónica CSIC; Santiago, Rocío CSIC ORCID; El Rahman Hassoun, Abed; Pérez, Fiz F. CSIC ORCID ; Easley, Regina; Álvarez-Rodríguez, Marta CSIC ORCID | Palabras clave: | Ocean acidification Saturation states Bio-geochemistry Oceanic carbon cycle Time-series CO2 system monitoring CO2 system variables Climate goal |
Fecha de publicación: | 7-jun-2022 | Editor: | American Chemical Society | Citación: | Environmental Science and Technology 56(12): 7381-7395 (2022) | Resumen: | The spectrophotometric methodology for carbonate ion determination in seawater was first published in 2008 and has been continuously evolving in terms of reagents and formulations. Although being fast, relatively simple, affordable, and potentially easy to implement in different platforms and facilities for discrete and autonomous observations, its use is not widespread in the ocean acidification community. This study uses a merged overdetermined CO2 system data set (carbonate ion, pH, and alkalinity) obtained from 2009 to 2020 to assess the differences among the five current approaches of the methodology through an internal consistency analysis and discussing the sources of uncertainty. Overall, the results show that none of the approaches meet the climate goal (± 1 % standard uncertainty) for ocean acidification studies for the whole carbonate ion content range in this study but usually fulfill the weather goal (± 10 % standard uncertainty). The inconsistencies observed among approaches compromise the consistency of data sets among regions and through time, highlighting the need for a validated standard operating procedure for spectrophotometric carbonate ion measurements as already available for the other measurable CO2 variables. | Descripción: | 15 pages, 5 figures, 1 table.-- This publication is licensed under CC-BY 4.0 | Versión del editor: | https://doi.org/10.1021/acs.est.1c06083 | URI: | http://hdl.handle.net/10261/274757 | DOI: | 10.1021/acs.est.1c06083 | ISSN: | 0013-936X | E-ISSN: | 1520-5851 |
Aparece en las colecciones: | (IIM) Artículos (ICM) Artículos (IEO) Artículos |
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Carbonate_Ion.pdf | 3,83 MB | Adobe PDF | Visualizar/Abrir | |
es1c06083_si_001.pdf | 836,11 kB | Adobe PDF | Visualizar/Abrir |
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