Accelerator Mass Spectrometry And Marine Biogeochemistry

加速器质谱和海洋生物地球化学

• 批准号: CRC-2018-00050
• 负责人: Walker, Brett
• 金额: $ 8.74万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Canada Research Chairs
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=730323
• 关键词: Accelerator; Mass; Spectrometry; Marine; Biogeochemistry

Marine dissolved and particulate organic matter (DOM, POM) are two of the ocean¿s most influential carbon and nitrogen reservoirs. Both play an important role in regulating Earth¿s climate. Previous work suggests size and composition are important in determining DOM and POM biological availability and cycling. Dr. Walker will use advanced size-fractionation, isotopic measurements and molecular-level approaches to better characterize DOM and POM. He will utilize new applied accelerator mass spectrometry (AMS) techniques to advance our understanding of chemical oceanography and reveal new processes controlling DOM and POM biogeochemical cycling, and their deep ocean storage, on modern to millennial timescales.

海洋溶解有机物和颗粒有机物（DOM、POM）是海洋的两个部分。最具影响力的碳库和氮库都在调节地球方面发挥着重要作用。先前的工作表明，尺寸和组成对于确定 DOM 和 POM 的生物可用性和循环非常重要。Walker 博士将使用先进的尺寸分级、同位素测量和分子水平方法来更好地表征 DOM 和 POM。加速器质谱 (AMS) 技术可增进我们对化学海洋学的理解，并揭示在现代到千年时间尺度上控制 DOM 和 POM 生物地球化学循环及其深海储存的新过程。