[B-CG10] 顕生代生物多様性の変遷：絶滅と多様化

[BCG10-09] 大量絶滅と宇宙気象学的誘因

*磯崎 行雄¹ (1.東京大学大学院総合文化研究科広域科学専攻広域システム科学系)

キーワード：大量絶滅、銀河宇宙線、地球気候

In addition to the most prevalent scenario of mantle plume-generated large igneous provinces (LIPs) for the end-Permian extinction, a new aspect of cosmoclimatology is introduced with respect to astrobiology. Galactic cosmic radiation (GCR) and solar/terrestrial responses in magnetism could have had a profound impact on Earth’s climate, in particular, on extensive cloud coverage and global cooling. Other past major mass extinctions need to be tested with this new view, as star-burst events in the Milky Way Galaxy apparently coincide in timing. The study of past mass extinctions on Earth is entering a new stage with a new astrobiological perspective.