TY - DATA AU - Ohsumi,Takashi ED - International Gas Union, IGU ED - World Gas Conference (22nd. : 2003 jun 1-5 : Tokyo) ED - International Gas Union, IGU TI - Aquifer sequestration of CO2: a comparison with the direct ocean disposal U1 - CD I249 1 0013788 N1 - Disponible en CD en formato PDF N2 - Transcripción del abstract original del autor: This report is an essay by a geochemist on the comparison between aquifer and ocean sequestration of CO2. The main driving force for the sequestered carbon dioxide to escape from the injection point is the buoyancy in both concepts The striking difference in the CO2 behaviors between the cases of aquifer and ocean sequestration is the free water body availability, which explains well the timescale of CO2's returning to the atmosphere. For the leakage concerns, the carbon cycle consideration will give clues on the ocean sequestration case, while a possible self-sealing mechanism will play an important role in the risk assessment of the aquifer sequestration ER -