[M-IS05] 南大洋・南極氷床が駆動する全球気候変動

[MIS05-P06] Application of AI-based classification to planktic foraminifera assemblage in the Southern Ocean

*松井 浩紀¹、板木 拓也²、池原 実³ (1.秋田大学大学院 国際資源学研究科、2.産業技術総合研究所、3.高知大学海洋コア総合研究センター)

キーワード：自動分類、浮遊性有孔虫、南大洋

Microfossils provide valuable information on past climate changes, although counting and picking of microfossils necessitate a large amount of effort and time. Recent development of a system for automated image collection and AI-based classification of microfossils thus can significantly contribute biostratigraphy and paleoceanography. Because Southern Ocean (SO) planktic foraminifera assemblage is characterized by generally low diversity (i.e., small number of species), it is suitable to develop AI-based classification. We utilize miCRAD (microfossil Classification and Rapid Accumulation Device) system to differentiate planktic foraminifera Globigerina bulloides, Neogloboquadrina pachyderma, other foraminifera species, and all other particles of a marine core in the SO. We report preliminary results of classification accuracy to the above four categories (81.3% on average). We discuss further improvements of classification model and potential application to SO paleoceanography.