Origin, Development, and Transport of Arctic Sea Ice

北极海冰的起源、发展和运输

• 批准号: 9400144
• 负责人: Stephanie Pfirman
• 金额: $ 9.13万
• 依托单位: Barnard College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-10-01 至 1997-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9400144&HistoricalAwards=false
• 关键词: Origin; Development; Transport; Arctic; Sea

This project is the investigation of the redistribution of sediment and pollutants over the Arctic basin through transport by sea ice, a heretofore neglected aspect of the depositional history of the arctic sea ice and ocean bottom. It will focus on the reconstruction of sediment and pollutant incorporation mechanisms, as well as the origin, development, and transport history of individual floes. The study will concentrate on the Beaufort Gyre, where the ice is relatively old, and where individual floes may have significantly different histories. Multiple variables that include the physical properties of the sea ice and the sediments, the contaminant chemistry, and the isotopic oxygen analysis, will be combined in an analysis for the origin, development, and transport history of sea ice in the Amerasian Basin. The work can potentially develop techniques for distinguishing on the basis of the combined indicators between ice formed in the Canadian or Siberian sectors of the Arctic Ocean, and provide information on such questions as how widely distributed is ice with an apparent river signal (relative depletion of oxygen-18), and does it tend to have greater contaminant loads.

该项目是调查沉积物和污染物通过海冰运输在北极盆地重新分布的情况，这是北极海冰和洋底沉积历史中迄今被忽视的一个方面。 它将侧重于重建沉积物和污染物的合并机制，以及起源，发展和个别絮凝物的运输历史。 这项研究将集中在博福特环流，那里的冰相对较老，个别浮冰可能有显着不同的历史。 多个变量，包括海冰和沉积物的物理性质，污染物化学和同位素氧分析，将结合在一起的起源，发展和运输历史的海冰在美亚盆地的分析。 这项工作有可能开发出根据综合指标区分北冰洋加拿大或西伯利亚部分形成的冰的技术，并提供关于以下问题的信息：具有明显河流信号的冰的分布范围有多广（氧-18的相对消耗），以及它是否倾向于具有更大的污染物负荷。