Impact of a 1℃ warming : paleoenvironmental studies of northern sea of Japan during

升温1℃的影响：日本北海古环境研究

• 批准号: 13640470
• 负责人: KITAMURA Akihisa
• 金额: $ 2.37万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640470/
• 关键词: near-shore environment; marine ecosystem; sedimentary records; climate; biologic production; human activity; 温暖化; 日本北方海域; 中世温暖期; 小氷期; 古環境; 貝類; 有孔虫; 火山灰

We collected sedimentary samples from Hakodate Bay, Hokkaido and analyzed fossil records to examine response of cold-water ecosystem to climatic changes. The youngest graded gravely to sandy bed in Hakodate Bay was discovered to contain abundant glassy spheres of 0.5-2.0mm in diameter. The stratigraphic distribution and the processes of formation and supply of the glassy spheres, and the history of natural and anthropogenic events influencing Hakodate Bay, lead to the following conclusions:1)the glassy spheres may be formed by explosions of large steamships in the east head of the bay during the World War II (July,14,1945); and2)during Typhoon Toyamaru in 1954, the storm surge and associated currents could have carried abundant sediment, including the glassy spheres, seaward and deposited them as the youngest graded bed in Hakodate Bay.The storm bed may be useful as a key bed that can be used to understand depositional process and environmental changes in Hakodate Bay.

我们从北海道函馆湾收集了沉积样本并分析了化石记录，以研究冷水生态系统对气候变化的响应。函馆湾最年轻的砾石至沙床被发现含有大量直径为 0.5-2.0 毫米的玻璃球体。通过对玻璃球的地层分布、形成和供给过程以及影响函馆湾的自然和人为事件的历史，得出以下结论：1）玻璃球可能是由东头大型轮船爆炸形成的。第二次世界大战期间海湾的情况（1945 年 7 月 14 日）； 2) 1954 年台风富山丸期间，风暴潮和相关洋流可能携带了丰富的沉积物，包括玻璃球，向海沉积，并将它们沉积为函馆湾最年轻的分级床。风暴床可能是有用的关键床，可以用于了解函馆湾的沉积过程和环境变化。

项目成果

北村晃寿, 坂口佳孝: "函館湾から見つかった小球状ガラス粒子を含むストーム堆積物"第四紀研究. 43. 63-68 (2004)

Akihisa Kitamura、Yoshitaka Sakaguchi：“函馆湾发现的含有小球形玻璃颗粒的风暴沉积物”第四纪研究 43. 63-68 (2004)。