Travel expenses for the study of mercury cycling in the high Arctic

研究北极高纬度汞循环的旅费

• 批准号: 305535-2007
• 负责人: Amyot, Marc
• 金额: $ 1.09万
• 依托单位: Université de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Northern Research Supplement
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=480896
• 关键词: Travel; expenses; study; mercury; cycling

Mercury (Hg) is a global pollutant that remains the main cause of governmental advisories related to fish consumption in North America. It is also massively deposited in the high Arctic during polar sunrise, and is incorporated in Arctic food chains, posing a threat to northern communities. Key steps dictating the fate of Hg in aquatic systems include processes affecting methylmercury (MeHg) stability in water and Hg bioavailability towards algae and methylating bacteria. I propose a research program that will tackle some critical gaps of knowledge in this sequence of events, through a combination of laboratory and field studies, in northern environments. The long term objectives of my proposal are: 1) to assess the importance of Hg photodemethylation in aquatic systems and explore its link to photoredox reactions; 2) to link Hg redox chemistry to Hg bioavailability; 3) to assess the role of biogenic thiols in Hg redox chemistry and bioavailability. The Northern Supplement grant will be used to cover some extra cost of doing research in the high Arctic. Specifically, it will be used to cover part of the annual cost of two return tickets between Montreal and Resolute Bay, and associated cargo. The research will be conducted in the Resolute Bay area and on True Love Lowlands, a polar oasis. We plan to train two Inuit from the Resolute Bay community in scientific environmental sampling. We also plan to communicate our research in Inuktituk through annual reports, and to interact with the communities of Resolute Bay and Griese Fjord, in order to share scientific and traditional knowledge.

汞 (Hg) 是一种全球污染物，仍然是北美政府提出有关鱼类消费的建议的主要原因。它还在极地日出期间大量沉积在北极高地，并纳入北极食物链，对北部社区构成威胁。决定汞在水生系统中命运的关键步骤包括影响水中甲基汞 (MeHg) 稳定性的过程以及汞对藻类和甲基化细菌的生物利用度。我提出了一项研究计划，通过实验室和实地研究的结合，在北方环境中解决这一系列事件中的一些关键知识空白。我的提案的长期目标是：1）评估汞光去甲基化在水生系统中的重要性并探索其与光氧化还原反应的联系； 2) 将汞氧化还原化学与汞生物利用度联系起来； 3) 评估生物硫醇在汞氧化还原化学和生物利用度中的作用。北方补助金将用于支付在北极高纬度地区进行研究的一些额外费用。具体来说，它将用于支付蒙特利尔和坚决湾之间两张往返机票以及相关货物的年度费用的一部分。该研究将在坚决湾地区和极地绿洲真爱低地进行。我们计划对坚决湾社区的两名因纽特人进行科学环境采样培训。我们还计划通过年度报告交流我们在因纽特岛的研究，并与雷索卢特湾和格里斯峡湾的社区互动，以分享科学和传统知识。