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Abstract:
Marine CO2 system data (total alkalinity, and total dissolved inorganic carbon) were collected from full water column in austral summer 2020 on board the MV Malik Antarctica in 21 December to 14th January 2020, arranged by the Norwegian Polar Institute. Sampling efforts were concentrated along the 6°E meridional transect and along the coast of Dronning Maud Land near the Fimbul ice shelf. Hydrography of the water column was measured and seawater samples were collected from a CTD (conductivity-temperature-depth; SBE91+ system) mounted on a 12-Niskin-bottle SBE32 carousel water sampler following standard procedures. Seawater samples were analyzed post-cruise at the Institute of Marine Research, Tromsø, Norway following the method described in Dickson et al. (2007). Total dissolved inorganic carbon (DIC) was determined 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). Total alkalinity (ALK) determined by potentiometric titration with 0.1 N hydrochloric acid using a Versatile Instrument for the Determination of Titration Alkalinity (VINDTA 3S, Marianda, Germany). Routine analyses of Certified Reference Materials (CRM, provided by A. G. Dickson, Scripps Institution of Oceanography, United States) ensured the accuracy and precision of the measurements, which was better than ±2 µmol kg-1 for both DIC and ALK. Description of the analytical methods and sampling can be found in Lenss et al., accepted.
Further details on the data set can be found in: Lenss, M., S. Moreau., T. Hattermann., J. Wiktor., M. Różańska., P. Claeys., N. Brion., M. Chierici., A. Fransson., and K. Campbell. Sea ice melt drives phytoplankton bloom distribution and succession in the Kong Håkon VII Hav, in review, Elementa: Science of the Anthropocene, Ms. No. ELEMENTA-D-23-00122
This study is a contribution to the project the Norwegian Research Council RCN (RCN) project I-CRYME (Impact of CRYosphere Melting on Southern Ocean Ecosystems and biogeochemical cycles, #11993).