[M-IS16] 古気候・古海洋変動

[MIS16-P19] Examining MIS 5e Sea-Levels around Japan: 60+ Years of Sea-Level Proxy Analysis and Applied Dating Techniques

*Evan Tam^1,2、Yusuke Yokoyama^1,2 (1.University of Tokyo, Atmosphere and Ocean Research Institute、2.University of Tokyo, Graduate Program on Environmental Science)

キーワード：Paleosea-level, MIS 5e, Last Interglacial

Sea-level proxies chronicling Marine Isotope Stage 5e (MIS 5e, ca. 124 ka) have been examined in Japanese geologic literature for over at least the last 60 years. Formed during sea-level highstands and preserved predominantly by tectonic uplift processes, sea-level proxies in Japan are commonly identified as marine terraces and are chronologically constrained by their relation to identified tephra layers or other dated strata. Stratigraphic correlations are used in conjunction to numerous dating techniques such as paleontological analysis, tectonic uplift rates, tephra (volcanic ash), Uranium-Thorium (U/Th), Carbon 14 (¹⁴C), and Optically Stimulated Luminesce (OSL) dating techniques, linking these landforms to MIS 5e and a broader global history. Commissioned by the World Atlas of Last Interglacial Shorelines (WALIS), this study standardized data from over 70 studies, assembling data points for over 300 locations to create an updated overview of MIS 5e proxy sea-levels throughout Japan.