海面下に着底した東南極氷床の安定性に関する研究

南极东部冰盖沉入海面的稳定性研究

• 批准号: 20J21145
• 负责人: BEHRENS BETHANY
• 金额: $ 1.98万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-24 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20J21145/
• 关键词: Antarctica; Beryllium; Ice sheet; Holocene; Tasmania; beryllium isotopes; radiocarbon; glacial cycles; East Antarctica; beryllium; cosmogenic isotopes; glacial discharge

Phase 1: Preparation of the high resolution Adelie Basin, East Antarctica samples has been completed, and analysis of beryllium isotopes by accelerator mass spectrometry is finished. A manuscript detailing the high resolution dataset is being prepared for submission to a scientific journal.Phase 2: Additional samples from the Sabrina Coast region of East Antarctica have been analyzed by accelerator mass spectrometer for beryllium isotopes. Comparison to a nearby core at a shallower depth reveal some interesting differences in the data, despite the proximity of the core sites. The results are under discussion with coauthors, and the data was presented at the Japan Geosciences Union meeting and the Geological Society of America meeting in poster form.Phase 3: Samples from Lake Selina in the West Coast Range of Tasmania have been analyzed by accelerator mass spectrometry, covering the past five marine isotope stages (MIS 1-5). With a greater sample number, it has been interesting to see a stronger climate signal than expected. The results from this analysis were presented at the Geological Society of America meeting as an oral presentation, and the manuscript is complete and under discussion with coauthors. It will shortly be submitted to a scientific journal.

第一阶段：完成了东南极阿德利海盆高分辨率样品的制备和铍同位素加速器质谱分析。正在编写一份详细介绍高分辨率数据集的手稿，以提交给一份科学杂志。第二阶段：用加速器质谱仪分析了东南极洲萨布丽娜海岸地区的更多样品，以确定铍同位素。与附近较浅深度的岩心进行比较，发现数据中存在一些有趣的差异，尽管岩心位置很接近。结果正在讨论与合著者，和数据在日本地球科学联盟会议和美国地质学会会议在海报的形式。第3阶段：样品从湖Selina在西海岸范围的塔斯马尼亚进行了分析，加速器质谱，涵盖了过去五个海洋同位素阶段（MIS 1-5）。随着样本数量的增加，有趣的是看到了比预期更强的气候信号。这项分析的结果在美国地质学会会议上以口头报告的形式提出，手稿已经完成，正在与合著者进行讨论。它将很快提交给一份科学杂志。

项目成果

Relationship between the Southern Westerly Winds and glacial dynamics at the Sabrina Coast, East Antarctica as determined by beryllium isotope ratios

由铍同位素比确定的东南极洲萨布丽娜海岸南西风与冰川动力学之间的关系

• 发表时间: 2022
• 作者: Murakami Chiaki;Hoshino Fumi;Sakai Hiromichi;Hayashi Yasuhiro;Yamashita Atsushi;Sakane Fumio;Bethany Behrens
• 通讯作者: Bethany Behrens

Beryllium isotope variations recorded in the Adélie Basin, East Antarctica reflect Holocene changes in ice dynamics, productivity, and scavenging efficiency

南极洲东部阿德利盆地记录的铍同位素变化反映了全新世冰动力学、生产力和清除效率的变化

• DOI: 10.1016/j.qsa.2022.100054
• 发表时间: 2022
• 期刊: Quaternary Science Advances
• 影响因子: 4.5
• 作者: Behrens, Bethany C.;Yokoyama, Yusuke;Miyairi, Yosuke;Sproson, Adam D.;Yamane, Masako;Jimenez-Espejo, Francisco J.;McKay, Robert M.;Johnson, Katelyn M.;Escutia, Carlota;Dunbar, Robert B.
• 通讯作者: Dunbar, Robert B.

Climatic and paleomagnetic forcing of beryllium isotope ratios of Lake Selina, Tasmania from 125,000 years ago to the present

125,000年前至今塔斯马尼亚塞利纳湖铍同位素比值的气候和古地磁强迫

• 发表时间: 2022
• 作者: Yamada Haruka;Hoshino Fumi;Lu Qiang;Sakane Fumio;Yuma Uematsu;Takuya Mieno;Bethany C Behrens
• 通讯作者: Bethany C Behrens

East Antarctic meltwater influx from the Wilkes Subglacial Basin since the Last Glacial Maximum as determined by beryllium isotopes

由铍同位素确定的自末次盛冰期以来来自威尔克斯冰下盆地的南极东部融水流入量

• 发表时间: 2021
• 作者: Bethany Behrens;Yosuke Miyairi;Adam D. Sproson;Masako Yamane;Yusuke Yokoyama
• 通讯作者: Yusuke Yokoyama

Antarctic slope current intensification following Last Glacial Maximum ice retreat

末次盛冰期冰退缩后南极坡流增强

• 发表时间: 2022
• 作者: Bethany C. Behrens;Yusuke Yokoyama;Yosuke Miyairi;Alexandra L Post;Leanne K Armand;Stephen P Obrochta;Naohiko Ohkouchi;Hisami Suga;Takato Takemura;Philip E O'Brien
• 通讯作者: Philip E O'Brien