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Abstract:
This dataset contains results of dissolved inorganic carbon (DIC) from seawater column samples collected in Kongsfjorden (between 78°50’ and 79°04’N and 11°20’ and 12°30’E) and West-Spitsbergen shelf (Svalbard) during three years in July/August 2018-2020 as part of the annual MOSJ (Monitoring of Svalbard and Jan Mayen) summer cruises using R/V Lance and R/V Kronprins Haakon. Vertical profiles of salinity and temperature and water samples for DIC were collected using a ship-board CTD probe attached to a Rosette-sampler with 12-Niskin bottles (SBE911 plus, Sea Bird Electronics, Bellevue, WA, United States). The CTD was calibrated by Sea Bird Electronics annually before each sampling season. DIC was measured after the cruises at the Institute of Marine Research (IMR Tromsø, Norway) using gas extraction of acidified samples followed by coulometric titration and photometric detection using a Versatile Instrument for the Determination of Titration carbonate (VINDTA 3D, Marianda, Germany). Replicate measurements of Certified Reference Material (CRM, provided by A. G. Dickson, Scripps Institution of Oceanography, United States) ensured the precision and accuracy of the measurements, which was better ±2 μmol kg−1 for DIC. References: Dickson, A. G., Sabine, C. L., and Christian, J. R. (2007). Guide to best practices for ocean CO2 measurements. chap. 4, pp. 23–78, PICES Spec. Publ., 3.