[M-GI25] Holocene paleoenvironment, paleoclimate, and paleohazards in the Pacific Islands

[MGI25-04] Holocene sea-level and environmental reconstructions using geochemistry on carbonate rocks in Western Pacific islands

★Invited Papers

*横山 祐典¹ (1.東京大学　大気海洋研究所 )

キーワード：完新世、海水準、古気候、古環境

Holocene climate will be discussedThere has been debate about whether the so-called Anthropocene is distinct from other periods of the Holocene, just as the last 100 years appear to be distinct from other periods of the Holocene, which began 11,700 years ago (Yokoyama et al., 2022; Kuwae et al., 2022). Understanding Holocene environments therefore provides a better platform for studying current environmental change. The islands of the Western Pacific are in a unique geographical position. They lie in the path of the Kuroshio Current, which transports heat from low to high latitudes, affecting local to regional climate and oceanographic conditions. They are also in the far field of present and past ice sheet locations where crustal deformation has occurred due to redistribution of surface load over the past 20,000 years, known as post-glacial isostatic adjustment (GIA; Yokoyama and Purcell, 2021). It is therefore a key region for understanding the melting history of the Antarctic and Greenland ice sheets during the Holocene. This also leads to the potential to better constrain vertical crustal deformation by earthquakes in the past.
In this talk I will present some of the studies we have carried out in the region.

References:
Kuwae et al., 2023, The Anthropocene Reviews, vol.10, pp 49-86
Yokoyama and Purcell, 2021 Geoscience Letters, vol 8, 13
Yokoyama et al., 2022, Scientific Reports, vol 12, 10068