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Based on the individual joint research projects that have been carried out by the MaCRI, Kochi University, and its partner institutions, we will promote international joint research that emphasizes international collaboration with the European Consortium for Ocean Research Drilling (ECORD) by systematically setting three research themes as follows,
R1: Quaternary super-interglacials
R2: Miocene warm period
R3: Eocene hyperthermals
R1
Southern Ocean paleoceanography during the super interglacials
R1
Southern Ocean paleoceanography during the super interglacials
Group Leader: Yusuke SUGANUMA (NIPR)
We will carry out sedimentological, geochemical, and micropaleontological analyses of the marine sediment cores, including the Southern Ocean cores collected by the IODP Expedition, the Antarctic continental shelf cores collected by the Japanese Antarctic Research Expedition (JARE) to reconstruct the changes in sea surface temperature, and sea ice condition during the past super-interglacials, such as Marine Isotope Stage (MIS) 5e and 11.
Group members: Minoru Ikehara (Kochi U), Takuya Itaki (GSJ/AIST), Osamu Seki (Hokkaido U), Yuji Kato (Kochi U), Takeshige Ishiwa (NIPR), Hiroki Matsui (Akita U), Mutsumi Iizuka (GSJ/AIST), Junpei Yoshioka (NIPR), Keiko Takehara (Hokkaido U), Xavier Crosta (U Bordeaux), Johan Etourneau (U Bordeaux), Rob McKay (Victoria University of Wellington), Mike Weber (U Bonn), Johann P. Klages (AWI), Dominic Hodgson (BAS), Volker Klemann (GFZ), Michele Rebesco (OGS), and others
R2
Indian Ocean Intermediate Water variability during the Miocene warm period
R2
Indian Ocean Intermediate Water variability during the Miocene warm period
Group Leader: Junichiro KURODA (AORI, Univ. Tokyo)
We will continue to analyze sediment samples from the Indian Ocean drilling cores obtained in the ReC23-01 project under the Repository Core Re-Discovery Program (ReCoRD) and reconstruct the paleoceanographic changes in the Indian Ocean since the Miocene. We are preparing to hold a workshop at the University of Graz in March 2026. We will combine the analysis data in Japan and Austria to deepen the discussion. We will also collaborate with the ReC23-03 Japan Sea project.
Group members: Yusuke Kubo (JAMSTEC), Kenji Matsuzaki (U Tokyo), Hironao Matsumoto (U Tsukuba), Arisa Seki (Fukada), Gerald Auer (U Graz), Werner Piller (U Graz), Theresa Nohl (U Vienna), Anna Joy Drury (U Leicester), and others
R3
Carbon cycle during the Eocene hyperthemals
R3
Carbon cycle during the Eocene hyperthemals
Group Leader: Erika TANAKA (Kochi Univ)
By advancing isotope geochemical analysis, microfossil analysis, elemental composition analysis, and statistical analysis of data sets from IODP drilling cores in the South Pacific, as well as legacy cores from the Indian Ocean and Atlantic Ocean, we will reconstruct the reality of the Eocene warm period and short-term warming events that occurred during that period, as well as the ocean circulation and carbon cycle. We will also advance the analysis of terrestrial geological samples and develop a discussion that includes paleoclimatic information.
Group members: Hitoshi Hasegawa (Kochi U), Kazutaka Yasukawa (U Tokyo), Yusuke Kuwahara (Kwansei Gakuin U), Thomas Westerhold (U Bremen), Ursula Röhl (U Bremen), and others
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