[M-IS28] 東アジア‐北西太平洋域高解像度古気候観測網

[MIS28-05] 日本海古環境データベース(JSPED)の構築とその応用

*尾崎 和海¹、平瀬 祥太郎¹、草間 優子¹、岩崎 渉²、横山 祐典¹、川幡 穂高¹、多田 隆治²、山本 正伸³ (1.東京大学 大気海洋研究所、2.東京大学 大学院理学系研究科、3.北海道大学 大学院地球環境科学研究院)

キーワード：日本海, データベース, 海洋表層水温, 氷期‐間氷期サイクル, アルケノン

The Japan Sea has seen fundamental changes in environmental conditions in response to the glacial-interglacial cycles, particularly the spatiotemporal variations of sea surface temperature (SST) and oceanic redox states. These climatically-driven changes along with geochemical and tectonic variations in boundary conditions such as sea-level, patterns of ocean current and oxygen distribution all would have affected evolution and distributions of diverse species. From this point of view, a comprehensive paleoenvironmental database of the Japan Sea will be a powerful tool for elucidating paleoenvironmental variations in geological past, and will provide useful information for testing hypothesis on relationships between past environmental changes and evolution. Here we develop a new database, Japan Sea Paleoenvironmental Database (JSPED), with the aim of a collaboration of paleoceanography and phylogeography. In this study, we will summarize the temporal variations of SST distributions over the last 20 kyr and its relationship with genetic diversity of several fish species in the Japan Sea, and discuss the future direction toward updates of JSPED.