When the effect of organic carbon is included, the lysocline can be kilometers above the saturation horizon and the saturation horizon and the CCD are coincident. The spheres were lightly etched in hydrochloric acid prior to deployment to remove any disordered layers produced by the grinding, and were weighed before and after the deployment. The scatter in the dissolution rate from sphere to sphere was much larger than the weighing error. The source of the scatter is unknown, although it may be related to heterogeneities in the calcite or variations in the boundary layer between the spheres and circulating seawater. Rate of dissolution of calcite spheres in the water column south of Hawaii.
Circles are rates averaged over five adjacent spheres.
Modeling equatorial Pacific sea floor sediments. Effects of different patterns of calcite dissolution on the 14 C age of surface sediments as a function of water depth. Measured 14C ages of surface sediments in the equatorial Pacific. G denotes glacial, c carbonate, nc non-carbonate, and ml mixed layer. Terms in the model which determine the dissolution necessary to produce the present day carbonate content and 14 C surface ages as a function of age and water depth for modern equatorial Pacific sediments.