Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS10] Paleoclimatology and paleoceanography

Wed. May 23, 2018 3:30 PM - 5:00 PM A07 (Tokyo Bay Makuhari Hall)

convener:Yusuke Okazaki(Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University), Atsuhiko Isobe(Research Institute for Applied Mechanics, Kyushu University), Akihisa Kitamura(静岡大学理学部地球科学教室, 共同), Masaki Sano(Faculty of Human Sciences, Waseda University), Hitoshi Hasegawa(Faculty of Science and Technology, Kochi University), Akira Oka(Atmosphere and Ocean Research Institute, The University of Tokyo), Michinobu Kuwae(Center for Marine Environmental Studies), Chairperson:Sano Masaki

4:07 PM - 4:22 PM

[MIS10-15] The study of reconstructing methods of temperature variation using tree-ring oxygen isotope

*Akane Tsushima1, Masaki Sano2, Zhen LI1, Takeshi Nakatsuka1, Koh Yasue3, Koji Fujita4 (1.Research Institute for Humanity and Nature, 2.Waseda University, 3. Shinshu Univ., 4.Graduate School of Environmental Studies, Nagoya University)

Keywords:Tree ring oxygen isotope, Temperature variation, Japan

The tree-ring δ18O is known to be an important proxy for reconstructing hydro-climate changes in monsoon Asia because the tree-ring δ18O is not controlled by ecological factors and is decided by 2 factors, one is δ18O in soil water and another is relative humidity. The δ18O in soil water reflect that in precipitation, but the precipitation δ18O is affected by some climate factors i.e., temperature, precipitation amount and atmospheric circulation pattern. Consequently, tree-ring δ18O changes influenced by not only soil water δ18O and relative humidity but also other climate factors. Therefore, we think that we can reconstruct not only precipitation variation but also temperature variation from tree-ring d18O. In this study, we discussed reconstruction method of temperature variation from tree-ring δ18O.