Diffusion simulation of CO₂ discharged in mesoscale deep ocean by using moving-nesting grid technique

Although direct injection of CO₂ into the deep ocean is believed feasible for the mitigation of global warming, its impact on the marine environment is of concern. To dilute the injected CO₂ to the point of little biological influence, using a ship that cruises and injects CO ₂, has been considered. To investigate the fate of CO₂ near the ship and in a mesoscale site, a multi-scale ocean model was developed in which a small-scale domain involving the injection ship moves in the mesoscale domain. The simulation results suggested that the moving ship is effective in suppressing the rise of CO₂ concentration. Copyright © by The International Society of Offshore and Polar Engineers.