Japan Geoscience Union Meeting 2015

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Poster

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS34] Paleoclimatology and paleoceanography

Wed. May 27, 2015 6:15 PM - 7:30 PM Convention Hall (2F)

Convener:*Kazuyoshi Yamada(Museum of Natural and Environmental history, Shizuoka), Minoru Ikehara(Center for Advanced Marine Core Research, Kochi University), Tomohisa Irino(Faculty of Environmental Earth Science, Hokkaido University), Akira Oka(Atmosphere and Ocean Research Institute, The University of Tokyo), Yusuke Okazaki(Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University), Ikuko Kitaba(Research Centre for Palaleoclimatology, Ritsumeikan University), Akihisa Kitamura(Institute of Geosciences, Faculty of Science, Shizuoka University), Masaki Sano(Research Institute for Humanity and Nature), Takeshi Nakagawa(Ritsumeikan University), Akira Hayashida(Department of Environmental Systems Science, Doshisha University)

6:15 PM - 7:30 PM

[MIS34-P21] On the glacial carbon reservoir in the deep-sea

*Yusuke OKAZAKI1 (1.Kyushu University)

Keywords:Glacial period, Carbon reservoir

Numbers of studies has been performed to seek the glacial carbon reservoir in the deep-sea. Radiocarbon age offset between co-existing benthic and planktic foraminifers is widely used to estimate ventilation rate of the glacial deepwater. However, reconstructed results in previous studies were divided into two groups: comparable to the present and much older than the present. The discrepancy is caused by sediment disturbance inferred from major change in depth-age curve and estimation of regional marine reservoir age. These suggest an importance of primary information on sediment core sample and radiocarbon data.