Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Poster

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

[A-CC29] Ice cores and paleoenvironmental modeling

Tue. May 22, 2018 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Ryu Uemura(University of the Ryukyus), Kenji Kawamura(National Institute of Polar Research, Research Organization of Information and Systems), Ayako Abe-Ouchi(東京大学大気海洋研究所, 共同), Nozomu Takeuchi(Chiba University)

[ACC29-P01] Ice core dating using tree ring oxygen isotope

*Akane Tsushima1, Mask Sano2, Sojiro Sunako3, Podolskiy Evgeny4, Yoga Sato3, Koji Fujita 3 (1.Research Institute for Humanity and Nature, 2.Waseda University, 3.Graduate School of Environmental Studies, Nagoya University, 4.Hokkaido Univ. Arctic Research Center)

Keywords:Mountain glacier, Ice core, Dating

Alpine ice cores obtained from mountain glacier are considered to be an important proxy of paleoclimate changes. However, the dating of an ice core collected at lower latitudes is challenging due largely to complicate topographical and climatological conditions. Therefore, analyzing alpine ice cores is usually faced with dating error. On the other hand, tree-ring δ18O can be used to reconstruct annual precipitation change without dating error. In this study, we tried to develop a new dating method for alpine ice cores by collaborating with tree-ring δ18O data. In order to develop the new methodology, we collected tree-ring samples and an ice core in the Nepal Himalaya in 2017. Unfortunately, we could not obtain good ice core samples. Therefore we examined new dating methods using an existing ice core, which was obtained from the western Nepal Himalaya in 1998.