Japan Geoscience Union Meeting 2023

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[E] Oral

U (Union ) » Union

[U-03] Advanced understanding of Quaternary and Anthropocene hydroclimate changes in East Asia

Thu. May 25, 2023 9:00 AM - 10:30 AM Exhibition Hall Special Setting (1) (Exhibition Hall 8, Makuhari Messe)

convener:Li Lo(Department of Geosciences, National Taiwan University), Yusuke Yokoyama(Atmosphere and Ocean Research Institute, University of Tokyo), Kaoru Kubota(Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology), Chuan-Chou Shen(National Taiwan University), Chairperson:Kaoru Kubota(Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology), Li Lo(Department of Geosciences, National Taiwan University), Yusuke Yokoyama(Atmosphere and Ocean Research Institute, University of Tokyo)

9:20 AM - 9:35 AM

[U03-02] The record of spheroidal carbonaceous particles (SCPs) in Beppu Bay sediments: Further evidence for SCPs as a marker for Anthropocene industrialization

★Invited Papers

*Jun Inoue1, Natsuko Takenaka1, Takamoto Okudaira1, Michinobu Kuwae2 (1.Osaka Metropolitan University, 2.Ehime University)

Keywords:spheroidal carbonaceous particles (SCPs) , Beppu Bay sediments, fossil fuel combustion, industrialization, Anthropocene

Spheroidal carbonaceous particles (SCPs) are carbonaceous fly ash particles produced exclusively by industrial fossil fuel combustion. We examined the SCP record in Beppu Bay sediments in southern Japan, and compared this record with historical trends in industrial activity and monitoring data for atmospheric pollution in the region. Beppu Bay has varved sediments in the absence of bioturbation, providing an ideal situation for SCP study. Our results show that the temporal variation of SCP deposition is consistent with the trends of industrial activity and the temporal variation of atmospheric pollution status. We conclude that undisturbed sediments, such as the Beppu Bay sediments, have SCP records that adequately represent the historical trends of industrial activity and atmospheric pollution in detail. These results support that SCPs are a potential marker for the Anthropocene characterized by industrialization.