Ten years of Spanish ion carbonate data in the North Atlantic Ocean and Mediterranean Sea

• Main Authors: Álvarez, Marta, Pérez, Fiz F., Fernández-Guallart, E., Castaño, Mónica, Fajar, Noelia, García-Ibáñez, Maribel I., Santiago, Rocío, El Rahman Hassoun, Abed
• Format: Dataset
• Language: English
• Published: 2021
• Subjects: Hydrography; Acidification; North Atlantic; Mediterranean Sea; CO2 system; Ion carbonate; http://aims.fao.org/aos/agrovoc/c_1302; http://aims.fao.org/aos/agrovoc/c_6903; http://aims.fao.org/aos/agrovoc/c_14497; Dióxido de carbono; Agua de mar; Espectrofotometria
• Online Access: http://hdl.handle.net/10261/233954; https://doi.org/10.20350/digitalCSIC/13786

This dataset is composed of 2 files. The main one is the data set itself (10yy_CO3_Spanish_database_hy1.csv) in WHP-Exchange bottle format, with 2418 samples of temperature, salinity, silicate and phosphate concentrations, along with pH, alkalinity, total inorganic carbon and absorbance ratios for measuring ion carbonate in seawater with two different reagents [PbCl2 y Pb(ClO4)2]. Information about the cruise name, year and location (latitude and longitude) is also provided. Information about the spectrophotometric equipment use is also given. The other file (readme_ 10yy_CO3_Spanish_database.txt) includes a short description of the database variables, units and more details on the contained cruises.-- he data are provided under an Attribution-ShareAlike 4.0 International license. However, if you use the data, so as to support the authors, please consider citing the above-mentioned article where data collection and analytical techniques are given in detail. Here we only provide an overall description of the content of the data file Concentration of ion carbonate has become the fifth measurable variable of the seawater CO2 system since the publication of the work by Byrne and Yao (2008) introducing a spectrophotometric method similar to the standard pH procedure. However, opposite to pH, the ion carbonate method has been refined and updated in a series of works(Easley et al., 2013; Patsavas et al., 2015; Sharp et al., 2017 and Sharp and Byrne, 2019) that introduced modifications in the equations relating the UV absorbance measurements and the final ion carbonate concentration, the reagent used and other details. Except for the USA seminal research group, and the two Spanish teams at the IEO A Coruña and IIM-CSIC, no other oceanographic group has published research data using the ion carbonate spectrophotometric methods. The work by Fajar et al. (2015) used a collection of Spanish cruises from 2009 to 2014 to compare the initial spectrophotometric ion carbonate methods by Byrne and Yao (2008) and Easley et al. ...