Carbonate compensation depth
= Carbonate compensation depth
{wiki=Carbonate_compensation_depth}
The Carbonate Compensation Depth (CCD) is the ocean depth at which the rate of carbonate accumulation equals the rate of carbonate dissolution. Below this depth, the conditions in the ocean become more acidic due to an increase in the partial pressure of carbon dioxide (pCO2), which leads to the dissolution of calcium carbonate (CaCO3) materials such as shells and sediments.