A new reconstructing method of Tsunami attack during the last several thousand years by Sr ratio measurements in a varve of a brackish lake

咸水湖水域Sr比测量重建近几千年海啸袭击的新方法

• 批准号: 24654158
• 负责人: TOYODA Kazuhiro
• 金额: $ 0.67万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24654158/
• 关键词: 年縞堆積物; ストロンチウム同位体比; 津波; 汽水湖; 塩分濃度

This research is to pursue the possibility in reconstructing the history of tsunami attack during the last several thousand years based on Sr isotopic data extracted from an annually laminated sediment core taken in center part of Lake Ogawara in Aomori Prefecture. The Sr isotope could be served as proxy of paleosalinity of environmental waters. As for the Lake Ogawara, the method is problematic because the variations of Sr isotope in the sediment little reflect the past paleosalinity fluctuation inthe bottom water. This is due to the low Sr concentration in the river flowing to the lake.

本研究旨在探讨利用青森县小川湖中部一年一次的层状沉积物岩芯中提取的锶同位素数据，重建近几千年来海啸侵袭历史的可能性。锶同位素可作为环境水体古盐度的替代指标。至于小川湖，由于沉积物中锶同位素的变化很少反映底水过去的古盐度波动，这种方法是有问题的。这是由于流入湖泊的河流中锶浓度较低所致。

项目成果

Airborne radioactive contamination in urban areas from the nuclear accident in Fukushima

福岛核事故造成城市地区空气中放射性污染

• 发表时间: 2012
• 作者: Tsugeki;N. K.;et al.;豊田和弘
• 通讯作者: 豊田和弘

Sedimentary records of metal deposition in Japanese alpine lakes for the last 250 years: Recent enrichment of airborne Sb and In in East Asia

• DOI: 10.1016/j.scitotenv.2012.10.037
• 发表时间: 2013-01-01
• 期刊: SCIENCE OF THE TOTAL ENVIRONMENT
• 影响因子: 9.8
• 作者: Kuwae, Michinobu;Tsugeki, Narumi K.;Urabe, Jotaro
• 通讯作者: Urabe, Jotaro