[M-IS14] Paleoclimatology and paleoceanography

Fri. May 30, 2025 3:30 PM - 5:00 PM Convention Hall (CH-A) (International Conference Hall, Makuhari Messe)

convener:Takashi Obase(Japan Agency for Marine-Earth Science and Technology), Atsuko Yamazaki(Graduate School of Environmental Studies, Nagoya University), Hitoshi Hasegawa(Faculty of Science and Technology, Kochi University), Yusuke Okazaki(Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University), Chairperson:Takashi Obase(Japan Agency for Marine-Earth Science and Technology)

We discuss past environmental changes and events at interannual to tectonic timescale toward understanding Earth's climate system by integrating terrestrial and marine proxy studies and numerical modeling. At JpGU2025, in addition to the regular session, we will have a topic session on highlighting the characteristic of "present-day" climate and ocean from perspective of paleoclimate and paleoceanography. We hope this session will provide an opportunity to promote communication between participants from the multidisciplinary field.

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3:30 PM - 3:45 PM

[MIS14-26] Ocean circulation changes in early Eocene Hothouse inferred from deep-sea sediment silicification

*Kazutaka Yasukawa¹, Erika Tanaka^2,3, Yusuke Kuwahara^1,3, Kentaro Nakamura^1,3, Ann G. Dunlea⁴, Ingrid Hendy⁵, Bryan Niederbockstruck⁶, Ursula Röhl⁶, Minoru Ikehara², Yasuhiro Kato^1,3 (1.School of Engineering, The University of Tokyo, 2.MaCRI, Kochi University, 3.ORCeNG, Chiba Institute of Technology, 4.Woods Hole Oceanographic Institution, 5.University of Michigan, 6.MARUM, University of Bremen)

3:45 PM - 4:00 PM

[MIS14-27] Variety of Cretaceous alkenones as product of haptophytes: perspective for understanding high latitude paleotemperature during Cretaceous

*Takashi Hasegawa¹, Yukiko Kozaka¹, Tsukika Takahashi², Masashi A. Ikeda¹, Hiromichi Komiya^2,3 (1.Faculty of Geoscience and Engineering, Institute of Science and Engineering, Kanazawa University, 2.Graduate School of Natural Science and Technology. Kanazawa University, 3.Now at TEPCO)

4:00 PM - 4:15 PM

[MIS14-28] Analysis of carbon isotope record at the Cretaceous/Paleogene boundary using an ocean biogeochemical model

*Tomoki Takeda¹, Eiichi Tajika¹ (1.Tokyo University)

4:15 PM - 4:30 PM

[MIS14-29] A theoretical study of the marine biogeochemical cycles during the Paleocene-Eocene Thermal Maximum using a one-dimensional vertical ocean model

*Tamaki Rina¹ (1.The University of Tokyo)

4:30 PM - 4:45 PM

[MIS14-30] Response of the marine productivity to the Eocene hyperthermals: Insights from Ba stable isotope records of Northwestern Pacific carbonate sediments

*Yotaro Yamamoto^1,2, Yusuke Kuwahara^1,2,3, Takashi Miyazaki², Kazutaka Yasukawa¹, Kentaro Nakamura^1,3, Yasuhiro Kato^1,3 (1.School of Engineering, University of Tokyo, 2.JAMSTEC, 3.ORCeNG, Chiba Institute of Technology)

4:45 PM - 5:00 PM

[MIS14-31] PIMS and SSAMS at Atmosphere and Ocean Research Institute, The University of Tokyo to study climate, environment and biological sciences

*Yusuke Yokoyama^1,2,3,4, Yosuke Miyairi¹, Takahiro AZE¹, Yohei Matsui⁴, Shoko Hirabayashi¹ (1.Atmosphere and Ocean Research Institute, University of Tokyo, 2.Department of Earth and Planetary Science, University of Tokyo, 3.Research School of Physics, The Australian National University, 4.Japan Agency for Marine-Earth Sciences)

Session information