TA, total alkalinity; DIC, dissolved inorganic carbon; pCO2, carbon dioxide concentration; HCO3 −, bicarbonate concentration; CO32 −, carbonate concentration; POC, particulate organic carbon content per cell; PP, primary production per cell; PIC, particulate inorganic carbon content per cell; CR, calcification rate per cell; Chl a,
chlorophyll a content per cell.