Abstract. Oceanic Acidification is the process that describes a shift in the acid-base equilibrium caused by the rise of the CO2 concentration in the ocean. The project A.RIOS lists among its goals to establish an observation network of oceanic acidification in the Rías and the Galician shelf (NW Iberia). Included in that observation network, an autonomous instrument for spectrophotometric measurements of seawater pH was deployed at the Ría de Vigo during four periods between November 2017 and May 2019. We present here the pH data for those deployments along with temperature, salinity, and pressure data. All the data is available through an unrestricted repository at https://doi.pangaea.de/10.1594/PANGAEA.909933 (Varela et al., 2019). In the author's opinion, this dataset significantly improves the temporal resolution of the pH database in the Ría of Vigo.
First automatic pH measurements in the bottom layer of the Ria de Vigo (NW Spain)