On the Frontline: Tracking Ocean Acidification in an Alaskan Shellfish Hatchery
Fig 4
Top panel is pH on the total hydrogen ion scale (pHT) and the saturation state of the aragonite phase of CaCO3 (Ωarag).
The dashed red line is the sub-optimal 1.5 Ωarag threshold. Subsequent panels are a decomposition of Ωarag components: middle panel is calcium (Ca2+) and carbonate (CO32-) concentrations (mmol kg-1), and bottom panel is Ca2+ x CO32- ((mol kg-1)2 x 10−7) and the solubility product for aragonite (Ksp-arag; (mol kg-1)2 x 10−7).