Accelerator Mass Spectrometry and Marine Biogeochemistry

加速器质谱和海洋生物地球化学

• 批准号: 1000232278-2018
• 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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=695368
• 关键词: Accelerator; Mass; Spectrometry; Marine; Biogeochemistry

Marine dissolved and particulate organic matter (DOM, POM) are two of the oceans most influential carbon and nitrogen reservoirs. Both play an important role in regulating Earths 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）是海洋中最有影响力的两个碳和氮储存库。两者在调节地球气候方面都发挥着重要作用。以前的工作表明，大小和组成是重要的，在确定DOM和POM的生物有效性和循环。步行者博士将使用先进的尺寸分馏，同位素测量和分子水平的方法，以更好地表征DOM和POM。他将利用新的应用加速器质谱（AMS）技术来推进我们对化学海洋学的理解，并揭示在现代到千年的时间尺度上控制DOM和POM地球化学循环及其深海储存的新过程。