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.

本研究以青森县小川原湖中部每年一次的层状沉积物岩芯为研究对象，探讨了利用Sr同位素数据重建几千年来海啸袭击历史的可能性。Sr同位素可作为环境沃茨古盐度的代用指标。对小川原湖而言，由于沉积物中Sr同位素的变化不能反映古盐度的变化，因此该方法存在问题。这是由于流入湖泊的河流中Sr浓度较低。

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