Sediment Traps for Studying the Fate of Organic Matter and Associated Contaminants in the Arctic Ocean

用于研究北冰洋有机物和相关污染物归宿的沉积物捕集器

• 批准号: 458531-2014
• 负责人: Kuzyk, ZouZou
• 金额: $ 5.68万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=541960
• 关键词: Sediment; Traps; Studying; Fate; Organic

Funds are requested to purchase six Baker-style sequential sediment traps for the study of cycling of organic matter and associated contaminants in the Canadian Arctic Ocean. As the Arctic is undergoing dramatic change, so are the quantity and composition of land-derived organic matter entering the Arctic Ocean. Alterations in organic matter in the sea not only directly affect marine productivity and exchange of greenhouse gases, but also the behavior of contaminants such as mercury, which cycle in association with organic matter. The latter is of particular importance as mercury, especially its organic form methylmercury, is one of the primary contaminants of concern in the Arctic marine ecosystem. Evidence is emerging that the production of methylmercury in seawater is associated with organic matter, yet the mechanism remains poorly known.

需要资金购买六个贝克式顺序沉积物捕集器，用于研究加拿大北冰洋有机物和相关污染物的循环。随着北极正在经历戏剧性的变化，进入北冰洋的陆源有机物的数量和组成也在发生变化。海洋中有机物的变化不仅直接影响海洋生产力和温室气体的交换，而且还影响汞等污染物的行为，这些污染物与有机物一起循环。后者特别重要，因为汞，特别是其有机形式的甲基汞，是北极海洋生态系统中令人关切的主要污染物之一。越来越多的证据表明，海水中甲基汞的产生与有机物有关，但其机制仍鲜为人知。