南極ドームふじにおける最古級の深層氷床コア掘削とドームふじコアの気体分析に関する最新の研究成果

大藪 幾美; 川村 賢二; 北村 享太郎; 第３期ドームふじ観測計画推進 委員会

doi:10.14862/geochemproc.71.0_249

Abstracts of Annual Meeting of the Geochemical Society of Japan

DOI https://doi.org/10.14862/geochemproc.71.0_249

Conference information

Host: Abstracts of Annual Meeting of the Geochemical Society of Japan

Name : Abstracts of Annual Meeting of the Geochemical Society of Japan

Number : 71

Date : September 18, 2024 - September 20, 2024

Introduction of the Dome Fuji Deep Ice Coring Project 3 and latest results on gas analysis of the Dome Fuji ice core

*Oyabu Ikumi, Kawamura Kenji, Kitamura Kyotaro, Members of Dome Fuji Deep Ice Coring Project ３ committee

Author information

Keywords: Antarctica, ice core, Dome Fuji, oldest ice

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 249-

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Abstract

About one million years ago, the glacial and interglacial cycle changed from 40 kyr to 100 kyr (Mid-Pleistocene transition, MPT), but the causes and mechanisms behind this change remain unclear. Currently, multiple international projects, including Japan, are conducting the "Oldest Ice Project" in various regions of Antarctica to try to solve the mysteries of the MPT. We selected a site for drilling the oldest ice core in the 2022/2023 field season and drilled a 126 m shallow ice core in the 2023/2024 field season. Deep drilling will begin this season. In this presentation, we will introduce the process of selecting the drilling site, report on the activities at the Dome Fuji base II, and outline future plans. Additionally, we will present the latest research regarding gas analysis of the first and second Dome Fuji cores.

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