The Geochemistry of Trace Elements in Arctic Shelf Waters

北极陆架水域微量元素的地球化学

• 批准号: 9224921
• 负责人: Christopher Measures
• 金额: $ 17.3万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-06-01 至 1997-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9224921&HistoricalAwards=false
• 关键词: Geochemistry; Trace; Elements; Arctic; Shelf

This project is an examination of the geochemistry of naturally occurring trace elements in the Arctic Ocean. The primary trace element is aluminum, but measurements of iron, beryllium, and selenium will also be made. The objective is to determine the magnitude, variability, and source of aluminum enrichment of the shelf brines in the Barents, Kara, and Laptev Seas, and to use these results to infer hydrographic processes of the eastern Arctic Ocean. The Norwegian and Greenland Seas have a dissolved aluminum concentration that is considerably higher than expected from the exchange of water masses, pointing to a regional external source of aluminum. While the normal pathways are the dissolution of aluminum carried through the atmosphere and deposited at the surface, and through river discharge, an additional arctic pathway is by fractionation in the freezing process. That is, sea ice is depleted and the resulting brine is enriched in aluminum. The measurements will be made on a Summer 1993 cruise of the German polar research vessel POLARSTERN as part of a wide-ranging physical and chemical observing program. An exceptional framework of hydrographic data will be available for the interpretation and analysis of these geochemical measurements.

这个项目是一个自然的地球化学的检查 微量元素在北冰洋的分布。 第一次追踪 元素是铝，但铁，铍， 硒也将被制造。 目标是确定 的幅度，变异性和铝富集的来源， 巴伦支海、卡拉海和拉普捷夫海的大陆架盐水， 这些结果来推断北极东部的水文过程 海洋 挪威海和格陵兰海有一个溶解的铝 浓度大大高于预期， 水团的交换，指向一个区域性的外部水源， 铝。 虽然正常的途径是溶解 铝通过大气层进行，并在沉积 表面，并通过河流排放，一个额外的北极通道 是通过冷冻过程中的分馏。 也就是说，海冰是 贫化并且所得盐水富含铝。 测量工作将在1993年夏季德国的一次巡航中进行 极地研究船POLARSTERN作为广泛的物理 和化学观察计划。 一个特殊的框架， 将提供水文数据进行解释， 分析这些地球化学测量结果。