Editing Lysocline (section)

== Calcite compensation depth ==
The [[Carbonate compensation depth|calcite compensation depth]] (CCD) occurs at the depth that the rate of calcite to the sediments is balanced with the dissolution flux, the depth at which the CaCO<sub>3</sub> content are values 2–10%.<ref name=":2" />  Hence, the lysocline and CCD are not equivalent. The lysocline and compensation depth occur at greater depths in the [[Atlantic Ocean|Atlantic]] (5000–6000 m) than in the [[Pacific Ocean|Pacific]] (4000–5000 m), and at greater depths in [[Tropics|equatorial regions]] than in [[Polar regions of Earth|polar regions]].<ref>{{Cite journal|last1=Volat|first1=J. L.|last2=Pastouret|first2=L.|last3=V. G.|first3=Colette|date=1980|title=Dissolution and carbonate fluctuations in Pleistocene deep-sea cores: A review|journal=Marine Geology|volume=34|issue=1|pages=1–28|doi=10.1016/0025-3227(80)90138-3|bibcode=1980MGeol..34....1V|issn=0025-3227}}</ref>

The depth of the CCD varies as a function of the chemical composition of the seawater and its temperature.<ref>{{Cite journal|last=Broecker|first=W. S.|date=2009|title=Wally's Quest to Understand the Ocean's CaCO3 Cycle|journal=Annual Review of Marine Science|volume=1|issue=1|pages=1–18|doi=10.1146/annurev.marine.010908.163936|pmid=21141027|bibcode=2009ARMS....1....1B|s2cid=45348785|issn=1941-1405}}</ref> Specifically, it is the deep waters that are undersaturated with [[calcium carbonate]] primarily because its solubility increases strongly with increasing pressure and [[salinity]] and decreasing temperature. As the atmospheric concentration of [[carbon dioxide]] continues to increase, the CCD can be expected to decrease in depth, as the ocean's acidity rises.<ref name=":1" />