Reconstruction of Tropical Glacial Ocean by Coral Band

珊瑚带重建热带冰川海洋

• 批准号: 10041107
• 负责人: KAYANNE Hajime
• 金额: $ 7.87万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10041107/
• 关键词: coral annual band; paleoceanography; glacial stage; tropical ocean; Palau Islands; Australia; oxygen stable isotope; 酸素同位対比; 古海洋

To understand the conditions of coral reef formation during the glacial times, echo-sounding research was conducted on fore-reef landforms in Palau Islands. Basic environmental conditions in Palau Islands, Micronesia and the Great Barrier Reefs were obtained : temporal/spatial changes in sea surface temperature and salinity, and the relation between these environmental factors and annual band proxies were investigated. Temperature and salinity since January, 1998 have been monitored in Palau Islands, Micronesia. We made transect surveys on temperature and salinity in the lagoon. Sea water has been sampled from the lagoon every half month.The newly introduced mass spectrometry with an auto-carbonate device has been tested for its accuracy and precision. At Australian National University, we communicated with the researchers on coral annual band analysis. We investigated the procedures for stable isotope and trace metal analysis at this University. Their field is southwest Pacific and our field is northwest Pacific and we discussed the possible telteconnections between the two areas.

为了了解冰期珊瑚礁形成的条件，对帕劳群岛的前礁地貌进行了回声测深研究。获得了帕劳群岛、密克罗尼西亚群岛和大堡礁的基本环境条件：海表温度和盐度的时空变化，以及这些环境因子与年带替代指标之间的关系。对密克罗尼西亚帕劳群岛自1998年1月以来的温度和盐度进行了监测。我们对泻湖的温度和盐度进行了横断面调查。每半个月从泻湖中采集一次海水样品，并对新引进的自动碳酸盐质谱仪的准确度和精密度进行了测试。在澳大利亚国立大学，我们与研究人员就珊瑚年带分析进行了交流。我们调查了稳定同位素和痕量金属分析的程序在这所大学。他们的场区是西南太平洋，我们的场区是西北太平洋，我们讨论了这两个地区之间可能的远程连接。