Site selection in CO2 ocean sequestration: Dependence of CO2 injection rate on eddy activity distribution |
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| Authors: | Yoshio Masuda Yasuhiro Yamanaka Yoshikazu Sasai Michimasa Magi Takashi Ohsumi |
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| Affiliation: | 1. Hokkaido University, N10 W5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan;2. Research Institute of Innovative Technology for the Earth (RITE), 9-2 Kizugawadai, Kizu-cho, Soraku-gun, Kyoto 619-0292, Japan;3. Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25, Showa-machi, Kanazawa-ku, Yokohama-city, 236-0001, Japan;4. Creation of Technological Seeds Responding to Social Demands (CREST), Science and Technology Agency (JST), Sanbancho 5, Tokyo 102-0075, Japan;1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, PR China;2. Department of Ocean Technology, Policy, and Environment, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan;1. Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore;2. Lloyd’s Register Global Technology Centre Pte Ltd, 138522, Singapore;1. Key Laboratory of Ocean Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, PR China;2. Deepwater Engineering Key Laboratory, China National Offshore Oil Corporation Research Institute, Beijing 100080, PR China;1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China;2. Thermochemistry Laboratory, Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;1. Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;2. Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China |
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| Abstract: | Site selection in CO2 ocean sequestration is examined based on the idea that a site where injected CO2 is efficiently diluted is favourable in reducing/avoiding biological impacts. Simulations of CO2 injection into several sites by an eddy-resolving oceanic general circulation model (OGCM) show that the maximum CO2 concentration differs by a factor of 10 among sites. The distribution of eddy activity is the most important causative factor producing the geographical differences in CO2 dilution. Based on the relationship between the maximum CO2 concentration and eddy activity, we estimated the distribution of the maximum CO2 injection rate by a proposed method, which does not cause chronic impacts on biota. Around Japan, extensive ocean volume has the potential to dilute 20 million tonnes per year without chronic impacts, and some areas can be injected with 80 million tonnes per year. |
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