| Summary: | Poster.-- Encontros IIM 5ª fase, Vigo, 28 de xuño de 2024 The ocean absoirbs approximately one-third of anthropogenic C02 emissions (Friedlingstein et al., 2022), which :plays a crucial role in climate regulation, but modifies marine carbonate chemistry. This increase in C02 uptake has led to a long-term decrease in ocean pH, a phenomenon known as ocean acidification (OA; Caldeira and Wickett, 2003). Since pre-industrial times, the pH of the global ocean surface has decreased by 0.1 units, representing a 30% increase in acidity (Caldeira and Wickett, 2003). Anthropogenic C02 uptake and storage (Cant) in the ocean has significant spatial variability, so regional studies of OA rates are needed (Sabine et al., 2004). This study analyzes the evolution of ocean acidification of the main water masses of the Iberian basin which is part of the North Atlantic, a major oceanic for the sjnk of Cant (Gruber et al., 2019) This research has been financially supported by BOCATS2 project funded by Plan Estatal de lnvestigación Científica y Técnica y de lnnovación 2017-2020. Cruises were co-funded by CNRS and Ifremer In France. MF was funded by PTA2022-021307-I, MClN/AEl/10.13039/501100011033 and by FSE+ No
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