Antarctic Cryosphere evolution: To evaluate the role of the Southern Ocean in the global climate system during the Quaternary

南极冰冻圈演化：评估第四纪期间南大洋在全球气候系统中的作用

• 批准号: 23244102
• 负责人: IKEHARA Minoru
• 金额: $ 10.65万
• 依托单位: Kochi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-11-18 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23244102/
• 关键词: 南大洋; 海氷; 南極周極流; セディメントウェーブ; 気候変動; 生物ポンプ; バイオマーカー; ダスト; 南極; IRD; 珪藻; 酸素同位体比; 南極氷床; 氷期

Large-scale sediment wave structures were discovered on the Conrad Rise, Indian sector of the Southern Ocean. The sediment waves are most likely formed by bottom current interactions with the Antarctic Circumpolar Current (ACC). Based on the seismic survey, it is thought that the ACC was migrated to the north at about 1.5 Ma.Winter sea-ice edge was significantly shifted to the north at least about 15 degrees as latitude during the last glacial period. This indicated that the Southern Ocean surface water was stratified due to input of less saline water. In addition, the millennial-scale cooling and sea-ice expansion were occurred in the glacial South Indian Ocean.

在南大洋的印度板块康拉德海隆发现了大尺度的沉积物波浪结构。沉积物波很可能是由底流与南极绕极流（ACC）相互作用形成的。根据地震资料，认为ACC在1.5Ma左右发生了北移，末次冰期冬季海冰边缘明显北移了至少15 °。这表明，南大洋表层水分层，由于输入较少的盐水。此外，冰川期的南印度洋也出现了千年尺度的变冷和海冰扩张。

项目成果

Holocene migration of oceanic front systems over the Conrad Rise in the Indian Sector of the Southern Ocean

南大洋印度区康拉德海隆上全新世海洋锋系统的迁移

• 发表时间: 2012
• 期刊: Journal of Quaternary Science
• 影响因子: 2.3
• 作者: Katsuki;K.;Ikehara;M.;Yokoyama;Y.;Yamane;M.;Khim;B-K
• 通讯作者: B-K

Deglaciation history of Dronning Maud Land, East Antarctica deduced by 10Be exposure dating and geomorphology of Sor Rondane Mountains coupled with GIA modeling

通过 10Be 暴露测年和 Sor Rondane 山脉地貌结合 GIA 建模推断出东南极洲 Dronning Maud 地的冰消历史

• 发表时间: 2013
• 作者: Suganuma;Y.;Miura;H.;Zondervan;A.;Okuno;J
• 通讯作者: J

New IODP proposal for transect drilling in the Indian sector of the Southern Ocean: Conrad Rise and Del Cano Rise

IODP 在南大洋印度区横断面钻探的新提案：康拉德海隆和德尔卡诺海隆

• 发表时间: 2012
• 作者: M. Ikehara;Y. Nogi;Y. Ssuganuma;R. Dunbar;B.K. Khim;T. Naish;R. Levy;X. Crosta;L. De Santis;et al.
• 通讯作者: et al.

Well-preserved beach landform and sedimentary structure in East Antarctic coast affected by glacial-isostatic rebound

受冰川均衡回弹影响的南极东部海岸保存完好的海滩地貌和沉积结构

• 发表时间: 2013
• 作者: Miura;H.;Okuno;J.;Maemoku;H.
• 通讯作者: H.

浮遊性有孔虫に基づく更新世の南大西洋亜南極前線移動にともなう海洋構造変遷の解明

基于浮游有孔虫阐明更新世期间与南大西洋亚南极锋面运动相关的海洋结构变化

• 发表时间: 2013
• 作者: Kota Tobe;Yoshitaka Hashimoto;En-Chao Yeh;Chi-Shun Shiu;山﨑 誠，千葉 歌澄，佐藤 時幸，池原 実
• 通讯作者: 山﨑 誠，千葉 歌澄，佐藤 時幸，池原 実