Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS10] Paleoclimatology and paleoceanography

Wed. May 23, 2018 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

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)

[MIS10-P32] Ventilation changes in the western subarctic Pacific since the last glacial to deglacial periods

*Yusuke Okazaki1, Naomi Harada2, Osamu Seki3 (1.Kyushu Univ., 2.JAMSTEC, 3.Hokkaido Univ.)

We reconstructed the ventilation record of deep water at 2100 m depth in the western subarctic Pacific between 10 and 20 ka from radiocarbon measurements of coexisting planktic and benthic foraminiferal shells in sediment. Sediment core MU14-PS1 was obtained from the western subarctic Pacific off Kamchatka Peninsula during MU14 cruise by R/V Professor Multanovskiy in summer 2014. Radiocarbon age offset between coexisting planktic and benthic foraminiferal shells at MU14-PS1 suggests that increased ventilation from the last glacial maximum to Heinrich stadial 1. During Bolling-Allerod and Preboreal periods, small age reversals of planktic foraminiferal radiocarbon ages were found.