Deep ocean injection of liquid CO2
E.R. Ricketts et al. / Marine Micropaleontology 72 (2009) 165–175.
Technologies for injecting captured CO2 into the oceans may also have potential, but held still in the research phase and have not undergone full-scale test. They involve releasing CO2 into the water column of the ocean through a fixed pipeline or a moving ship, depositing it in the deep sea-floor at depths below 3,000 m where CO2 is denser than water. There are concerns about the impact that such technologies could have on ocean life and it is known that marine organisms could be harmed. Although the implications of long-term environmental change the ocean chemistry in this way are unclear, the oceans could become significantly acidified if CO2 injection occurred on a large scale.