Oral

Symbol A (Atmospheric and Hydrospheric Sciences) » A-CC Cryospheric Sciences & Cold District Environment

[A-CC29] Ice cores and past environmental changes

Tue. May 26, 2015 2:15 PM - 4:00 PM 301A (3F)

Convener:*Kenji Kawamura(National Institute of Polar Research, Research Organization of Information and Systems), Minoru Ikehara(Center for Advanced Marine Core Research, Kochi University), Nozomu Takeuchi(Chiba University), Ayako Abe-Ouchi(Atmosphere and Ocean Research Institute, The University of Tokyo), Chair:Kenji Kawamura(National Institute of Polar Research, Research Organization of Information and Systems), Ayako Abe-Ouchi(Atmosphere and Ocean Research Institute, The University of Tokyo)

Analyses of ice cores from polar and mountain regions have contributed for advancing reconstruction of the past environmental changes on timescales from years to several hundred thousand years, and understanding of the mechanisms behind them. In this session, we discuss environmental changes in the past on the basis of ice core studies and related researches (e.g. sediments and models). Studies on recording processes of paleoenvironmental signals and methods to extract them are also welcomed. Studies with deep-sea cores, terrestrial sediment cores, tree-rings and numerical modelings on similar time and spatial scales are also important and welcomed to discuss past environmental changes from multidisciplinary viewpoints.

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2:15 PM - 2:30 PM

[ACC29-01] Inconsistent relations among water stable isotope in Antarctic snow under different accumulation environments

*Yu HOSHINA¹, Koji FUJITA¹, Yoshinori IIZUKA², Hideaki MOTOYAMA³ (1.Nagoya University, 2.Institute of Low Temperature Science, Hokkaido University, 3.National Institute of Polar Research)

2:30 PM - 2:45 PM

[ACC29-02] Estimation of the age-depth relationship of Dome Fuji Ice Core using a sequential Bayesian approach

*Shin'ya NAKANO¹, Kazue SUZUKI¹, Kenji KAWAMURA², Frederic Parrenin³, Tomoyuki HIGUCHI¹ (1.The Institute of Statistical Mathematics, 2.National Institute of Polar Research, 3.Laboratoire de Glaciologie et Geophysique de l'Environnement)

2:45 PM - 3:00 PM

★ [ACC29-03] Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr

*Shuji FUJITA¹, F. Parrenin², M. Severi³, H. Motoyama¹, E. Wolff⁴ (1.National Institute of Polar Research, 2.CNRS, LGGE, F-38041 Grenoble, France, 3.Department of Chemistry, University of Florence, Florence, Italy, 4.Department of Earth Sciences, University of Cambridge, UK)

3:00 PM - 3:15 PM

[ACC29-04] Millennial scale site and source temperatures variability in Antarctica over the past 700,000 years

*Ryu UEMURA¹, Hideaki MOTOYAMA², FUJI ICE CORE RESEARCH GROUP, . DOME² (1.University of the Ryukyus, 2.National Institute of Polar Research)

3:15 PM - 3:30 PM

[ACC29-05] Glacial abrupt climate changes and thermal threshold of the Atlantic meridional overturning circulation

*Akira OKA¹, Ayako ABE-OUCHI¹, Yusuke YOKOYAMA¹, Kenji KAWAMURA², Hiroyasu HASUMI¹ (1.Atmosphere and Ocean Research Institute, University of Tokyo, 2.National Institute of Polar Research)

3:30 PM - 3:45 PM

[ACC29-06] The influence of glacial ice sheet on Atlantic meridional overturning circulation through atmospheric circulation change

*Sam SHERRIFF-TADANO¹, Ayako ABE-OUCHI¹, Masakazu YOSHIMORI², Akira OKA¹, Wing-le CHAN¹ (1.Atmosphere and Ocean Research Institute, University of Tokyo, 2.Faculty of Environmental Earth Science, Hokkaido University)

3:45 PM - 4:00 PM

[ACC29-07] Intermediate depth ice core drilling project 2015/2016 and some results of deep borehole logging, Antarctic ice sheet

*Hideaki MOTOYAMA¹, Atsushi FURUSAKI², Sumito MATOBA³, Shin SUGIYAMA³, Akiyoshi TAKAHASHI⁴, Yoichi TANAKA⁵, Morihiro MIYAHARA⁶, Morimasa TAKATA⁷, Takanobu SAWAGAKI⁸, Kunio SHINBORI³, Shoichi MORI³ (1.National Institute of Polar Research, 2.Asahikawa National College of Technology, 3.Institute of Low Temperature Science, Hokkaido University, 4.Geo Tecs Co. Ltd, 5.Geosystems Inc., 6.Anori Inc., 7.Nagaoka University of Technology, 8.Faculty of Env. Earth Science Hokkaido University)