日本地球惑星科学連合2018年大会

講演情報

[JJ] ポスター発表

セッション記号 M (領域外・複数領域) » M-IS ジョイント

[M-IS21] 南北両極のサイエンスと大型研究

2018年5月24日(木) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:中村 卓司(国立極地研究所)、杉本 敦子(北海道大学 北極域研究センター)、杉山 慎(北海道大学低温科学研究所、共同)、野木 義史(国立極地研究所)

[MIS21-P04] 南北両極におけるアイスコア掘削プロジェクト

*東 久美子1,2川村 賢二1,2藤田 秀二1,2中澤 文男1,2本山 秀明1,2 (1.国立極地研究所、2.総合研究大学院大学)

キーワード:アイスコア、南極、グリーンランド

Polar ice cores and borehole measurements provide us with valuable information on the past climate and environment, as well as that on ice sheet and glacier dynamics. Such information is prerequisite to understanding of the mechanisms of climatic and environmental changes, and is expected to contribute to better projections of future climate and sea level. In the next phases of Antarctic glaciological research, National Institute of Polar Research (NIPR) together with Dome Fuji Ice Core Consortium (ICC) plans to perform various activities related to the third deep ice-core drilling in the vicinity of Dome Fuji, in order to obtain the “oldest ice” with age much older than 800 kyr. This is also a contribution to International Partnership in Ice Core Sciences (IPICS), which defines the oldest ice project as most challenging. We plan to (i) investigate glaciological conditions (ice sheet surface conditions, englacial conditions and subglacial conditions) of the candidate site area; (ii) determine the exact location of the drilling site, and (iii) carry out deep drilling at the selected site. In Greenland, NIPR and collaborating universities have participated in international deep ice coring projects. Currently we participate in the East Greenland the East Greenland Ice Core Project (EGRIP). The purposes of the EGRIP are to advance our knowledge on the dynamics and past changes of the Greenland Ice Sheet and to reconstruct the climate and environment changes during the early Holocene, which was known to be warmer than today and should be an excellent analogue to the future Greenland affected by global warming. After the EGRIP, other deep ice coring projects will be carried out in Greenland to obtain spatial information on climate and ice sheet variability. By analyzing ice cores from both polar regions, we expect to understand the mechanisms and impacts of abrupt climate changes as well as glacial-interglacial climate changes.