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Tanaka, Toshiyuki*; Miyajima, Rikio*; Asai, Hideaki*; Horiuchi, Yasuharu; Kumada, Koji; Asai, Yasuhiro*; Ishii, Hiroshi*
Earth Planets and Space, 65(2), p.59 - 66, 2013/02
Times Cited Count：8 Percentile：23.68(Geosciences, Multidisciplinary)
C concentration in tree rings of beech trees living near CO
vents in the Hakkoda Cardera, Aomori, JapanHoriuchi, Kazuho*; Chiba, Takuji*; Hoshino, Yasuharu*; Oyama, Motonari*; Tanaka, Takayuki; Amano, Hikaru*
JAEA-Conf 2010-001, p.71 - 74, 2010/03
We investigated how volcanic CO emission affects the C concentrations in tree rings of beech trees in the Hakkoda Caldera in Aomori, which is one of high emission regions of volcanic CO in the world. There was a tendency that the obtained C concentrations were, surprisingly, quite near to the values of the concurrent atmospheric CO and decreased from 1991 to 2001. The C concentrations in caldera are lower than those of the control samples taken from a beech living outside of the caldera. We revealed the possibility that we can solve the local dynamics of fossil CO emission using C in tree rings. However, the maximum difference of C between inside and outside of the caldera was 14 permil. This result showed that the volcanic CO mixed with atmospheric CO by 4.4 ppm or less. As the trunk absorbing CO exist in height that is several meters higher than the volcanic CO vents, the low mixing may occur.
Tanaka, Yasuharu*; Goto, Kazuyuki*; Miyagawa, Kimio*; Tsukuda, Kazuhiro*; Goshima, Keiichiro*; Kunimaru, Takanori; Tsuruta, Tadahiko; Morikawa, Keita; Yuguchi, Takashi
no journal, ,
no abstracts in English
Yuguchi, Takashi; Kunimaru, Takanori; Morikawa, Keita; Uehara, Tomoko; Ishibashi, Masayuki; Yoshida, Hidekazu*; Tanaka, Yasuharu*
no journal, ,
no abstracts in English
Tanaka, Yasuharu*; Goto, Kazuyuki*; Miyagawa, Kimio*; Kiho, Kenzo*; Tsukuda, Kazuhiro*; Hama, Katsuhiro; Takeuchi, Ryuji; Morikawa, Keita; Yuguchi, Takashi
no journal, ,
no abstracts in English
Nakata, Kotaro*; Hasegawa, Takuma*; Tomioka, Yuichi*; Tanaka, Yasuharu*; Hama, Katsuhiro; Iwatsuki, Teruki
no journal, ,
The technology development of groundwater dating has been carried out as a part of CRIEPI-JAEA collaboration. The carbon-14 in the organic matter dissolved in groundwater is used to estimate groundwater age. The estimated age is almost same as the age that estimated by the He-4 in groundwater. This suggested that the age estimation by carbon-14 in organic matter can be useful tool to enhance the reliability of the data on groundwater age.
Tanaka, Yasuharu*; Nohara, Shintaro*; Hasegawa, Takuma*; Yata, Kotaro*; Hama, Katsuhiro; Iwasaki, Riyo
no journal, ,
no abstracts in English
Tanaka, Yasuharu*; Hama, Katsuhiro
no journal, ,
CRIEPI and JAEA have been carried out collaborative study. Two items have proposed for this study. One is development of groundwater dating methodology, the other is development of mass transport evaluation methodology. In this report, the study item and result are introduced.
Hama, Katsuhiro; Ishibashi, Masayuki; Tanaka, Yasuharu*
no journal, ,
Tono Geoscience Center of Japan Atomic Energy Agency has been carrying out the Mizunami Underground Research Laboratory Project. This project has three overlapping phases: Surface-based investigation phase (Phase I), Construction phase (Phase II), and Operation phase (Phase III). Currently, the project is being carried out under the Phase III. The development of mass transport modeling methodology is one of the important issues in the Phase III investigation. This report presents the status and future plan for this study.
