HR: 14:45h
AN: U33A-06    [Abstracts]
TI: Ecosystem Modelling for Impact Assessment of Possible Methane Leakage during Methane Hydrate Utilization
AU: * Yamazaki, T
EM: tetsuo-yamazaki@aist.go.jp
AF: Natl. Inst. of AIST, AIST Tsukuba West, 16-1 Onogawa, Tsukuba, 305-8569 Japan
AU: Nakano, Y
EM: yukihiko.nakano@aist.go.jp
AF: Natl. Inst. of AIST, AIST Tsukuba West, 16-1 Onogawa, Tsukuba, 305-8569 Japan
AU: Monoe, D
EM: Monoe.Daisuke@cti.co.jp
AF: Chuden CTI Co., Ltd., Nihonseimei-Sasashima Bldg., 1-27-2 Meieki-Minami, Nakamura-ku, Nagoya, 450-0003 Japan
AU: Oomi, T
EM: Oomi.Tomoaki@cti.go.jp
AF: Chuden CTI Co., Ltd., Nihonseimei-Sasashima Bldg., 1-27-2 Meieki-Minami, Nakamura-ku, Nagoya, 450-0003 Japan
AU: Doi, T
EM: Doi.Toshimasa@cti.go.jp
AF: Chuden CTI Co., Ltd., Nihonseimei-Sasashima Bldg., 1-27-2 Meieki-Minami, Nakamura-ku, Nagoya, 450-0003 Japan
AU: Nakata, K
EM: nakata@scc.u-tokai.ac.jp
AF: Tokai Univ., 3-20-1 Shimizu-Orido, Shizuoka, 424-8610 Japan
AU: Fukushima, T
EM: t-fukushima@sof.or.jp
AF: Ship and Ocean Foundation, Kaiyo Senpaku Bldg., 1-15-16 Toranomon, Minato-ku, Tokyo, 105-0001 Japan
AB: Natural methane hydrate has been scientifically studied as a carbon reservoir globally. However, in Japan, the potential for energy resource has been industrially highlighted. There is less domestic oil and natural gas resources in Japan, but many potential deposition areas for methane hydrate in ocean around Japan are the reasons. Less CO2 discharge from methane compared with coal, oil and conventional natural gas when the same calorie value we get is considered as the advantage for energy resource. However, because methane hydrate distributes in shallower sediment layer in ocean floor, accidental leakage of methane may occur while we utilize methane hydrate. Methane itself has 21-times impact on the greenhouse effect, if it reaches the atmosphere. Therefore, it is necessary to estimate the behavior in the environment after the leakage, if we want to use methane hydrate as energy resource. The mass balance after leakage of methane on seafloor and in water column is numerically studied through the analyses of methane emissions from natural cold seepages and hydrothermal activities in this research. The outline structure of mass balance ecosystem model creating is introduced and some preliminary examination results from the test calculation are discussed.
DE: 4255 Numerical modeling
DE: 4804 Benthic processes/benthos
DE: 4815 Ecosystems, structure and dynamics
DE: 4825 Geochemistry
DE: 4842 Modeling
SC: Union [U]
MN: 2005 Joint Assembly