著者

藤井 嘉章 フジイ ヨシアキ FUJII Yoshiaki

出版者

東京外国語大学大学院総合国際学研究科

雑誌

言語・地域文化研究 (Language, area and culture studies) (ISSN:13419587)

巻号頁・発行日

no.25, pp.361-378, 2019-01-31

著者

藤井 嘉章 東京外国語大学大学院・博士後期課程 フジイ ヨシアキ Tokyo University of Foreign Studies FUJII Yoshiaki

出版者

東京外国語大学国際日本研究センター

雑誌

日本語・日本学研究 / 東京外国語大学国際日本研究センター [編] (Journal for Japanese studies) (ISSN:21860769)

巻号頁・発行日

no.9, pp.37-56, 2019-03-31

著者

藤井 嘉章 フジイ ヨシアキ FUJII Yoshiaki

出版者

東京外国語大学国際日本研究センター

雑誌

日本語・日本学研究 / 東京外国語大学国際日本研究センター [編] (Journal for Japanese studies) (ISSN:21860769)

巻号頁・発行日

no.5, pp.27-48, 2015-03-31

著者

Fujii Yoshiaki Takahashi Kei Fukuda Daisuke Kodama Jun-ichi

出版者

Japanese Committee for Rock Mechanics

雑誌

Workshop on Rock Engineering and Environment proceedings(ARMS8)

巻号頁・発行日

vol.2014, pp.41-46, 2014-10-13

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An equation that represents the relationship between the volume of the injected water V and the maximum magnitude Mmax of induced earthquakes for various cases, including EGS (Enhanced Geothermal System), is expressed as M max = 0.75logV - 0.48 (1) Another equation that represents the relationship between the magnitude and the JMA (Japan Meteorological Agency) maximum seismic intensity scale SISmax of 40 randomly-selected, inland earthquakes in Japan is expressed as: SIS max = 1.36M - 1.12logd - 1.11 (2) where d is the focal depth (m). The equation that follows was derived from the preceding equations. SIS max = 1.02logV - 1.12logd - 1.76 (3) The volume of water injection by shale gas extraction in US was estimated and substituted into the equations, assuming that Eq. (2) could be used also for US earthquakes. The maximum magnitude and seismic intensity scale was predicted to be 6.0 and 3.5 (slight damage to residences), respectively, for the case where extraction had continued for 30 years. This estimate does not conflict with the fact that an M 5.6 event occurred five years after shale gas extraction began in the US. The same procedure was adopted for CCS (Carbon dioxide Capture and Storage) assuming that supercritical CO2 injection had the same effect in inducing seismicity. The injection volume is just 0.001% of the annual CO2 emission in Japan assuming that the allowable seismic intensity scale is 1. The injection of this small amount of CO2 is meaningless. We may have an M 7.1 whose SIS is 5.3 (heavy, significant damage to residences) if we inject 17% (this is IPCC's expectation) of the CO2 in Japan for 30 years into a CCS site. An M 7.1 is apparently not allowed. We need 510,000 CCS sites in Japan in order to inject 17% CO2 safely. It is impossible to construct so many CCS sites. In conclusion, either shale gas extraction or CCS should be carried out very carefully or we may have severe seismicity.

著者

Fujii Yoshiaki

出版者

Elsevier

雑誌

Journal of Atmospheric and Solar-Terrestrial Physics (ISSN:13646826)

巻号頁・発行日

vol.73, no.5, pp.643-652, 2011

被引用文献数

1 8

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This study suggests that the cause of the stagnation in global warming in the mid 20th century was the atmospheric nuclear explosions detonated between 1945 and 1980. The estimated GST drop due to fine dust from the actual atmospheric nuclear explosions based on the published simulation results by other researchers (a single column model and Atmosphere-Ocean General Circulation Model) has served to explain the stagnation in global warming. Atmospheric nuclear explosions can be regarded as full-scale in situ tests for nuclear winter. The non-negligible amount of GST drop from the actual atmospheric explosions suggests that nuclear winter is not just a theory but has actually occurred, albeit on a small scale. The accuracy of the simulations of GST by IPCC would also be improved significantly by introducing the influence of fine dust from the actual atmospheric nuclear explosions into their climate models; thus, global warming behavior could be more accurately predicted.

著者

藤井 嘉章 フジイ ヨシアキ FUJII Yoshiaki

出版者

東京外国語大学大学院総合国際学研究科

雑誌

言語・地域文化研究 (Language, area and culture studies) (ISSN:13419587)

巻号頁・発行日

no.24, pp.259-270, 2018-01-31