The Indo-Pacific deep waters are older and more time has passed for sorption of the chemicals onto sinking particles. Concentrations are, therefore, lower in the deep waters of the Indian and Pacific Oceans than in the deep Atlantic. The residence time of scavenged elements is short, typically less than 1000 years. External processes will markedly change the concentration of these elements because inputs or outputs can be much larger than As an example, see the distribution of aluminum. Concentrations of Al may also increase near the ocean bottom due to release from sediments.
Cold water holds more gas than does warm water.
Stable gas concentrations are higher in cold surface waters and when these cold waters sink into the ocean depths, they carry these gases along with them. These gases may be completely unreactive, such as the noble gases, or only very slightly reactive, such as nitrogen. The deep waters of the ocean are cold and have higher concentrations than the warm surface waters. There is little difference between the Atlantic and Pacific. As an example, see argon.