10.1594/PANGAEA.924969Sanders, TrystanTrystanSanders0000-0002-7605-0747Thomsen, JörnJörnThomsen0000-0001-5109-7728Müller, Jens DanielJens DanielMüller0000-0003-3137-0883Rehder, GregorGregorRehder0000-0002-0597-9989Melzner, FrankFrankMelzner0000-0002-5884-1318PANGAEA2020bicarbonatecalcificationcalciumClimate changeESIROmegaSalinitySIREvent labelDATE/TIMESiteDEPTH, waterTemperature, waterSalinityCarbon, inorganic, dissolvedpH, total scaleAlkalinity, totalCarbon dioxide, partial pressureBicarbonate ionCarbonate ionCalcite saturation stateAragonite saturation stateSubstrate inhibitor ratioExtended substrate inhibitor ratioCalciumMultiple investigationsCalculated2015-01-21T00:00:00/2017-08-22T00:00:00Dataset10.1594/PANGAEA.925017870 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis data set presents data from environmental coastal monitoring of carbonate chemistry parameters at the same 3 sites in the Baltic Sea over the course of 2 years. Poisoned water samples were analysed in laboratories in GEOMAR, Kiel and IOW, Rostock to understand the variation in carbonate chemistry and salinity and how this correlates with calcification rates of mussels in the field. These carbonate chemistry parameters were used to calculate aragonite saturation state (omega) and the ratio of calcification substrate to inhibitor (ESIR) to describe the environmental conditions relevant for calcification along the Baltic Sea salinity gradient.10.1514.0111154.05583354.3852777