Trace metal and isotope clean sampling system for oceanographic research

用于海洋学研究的痕量金属和同位素清洁采样系统

• 批准号: RTI-2021-00570
• 负责人: Cullen, Jay
• 金额: $ 10.9万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 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=718848
• 关键词: Trace; metal; isotope; clean; sampling

Canada's oceans are undergoing rapid change as a result of climate-driven alterations in sea ice cover and surface ocean circulation, which in turn can strongly influence biological productivity and the health of our fisheries, air-sea exchange of greenhouse gases (e.g. carbon dioxide) and the distribution of potentially harmful contaminants (e.g. mercury, lead). At present, our ability to predict the future trajectory and fully understand the impacts of these changes is limited by a poor understanding of the interacting chemical, physical and biological processes which shape the functional characteristics and resiliency of our three oceans. The distribution and variation of trace elements and isotopes (TEIs) with time and space in the ocean can provide important information on key biological, physical and chemical processes relative to ongoing global change. For example, trace elements influence biological productivity which ultimately impacts the ability of the oceans to absorb anthropogenic carbon dioxide and mitigate climate change. Similarly, spatial and temporal variability in primary production determines our fisheries yields. TEIs are also useful geochemical tracers of present ocean circulation and provide, through sediment records, proxy information about past ocean conditions, which can only be understood by studying TEIs in the modern ocean. To do this kind of research, seawater must be collected without contaminating it for trace metals during sampling - this is a difficult task that requires specialized equipment. The equipment requested here will help to maintain and expand Canadian capacity to reliably, cleanly sample the ocean for TEIs with the high spatial and temporal resolution required for modern oceanographic survey and process studies. This capacity is essential to allow Canadian contributions to global and regional studies that will provide invaluable information for oceanographic, fisheries and climate change research.

由于气候驱动的海冰覆盖和表面海洋循环的变化，加拿大的海洋正在迅速变化，这又可以强烈影响生物生产力和我们渔业的健康，空气海上的温室气体交换（例如，二氧化碳）以及潜在的危害污染物的分布（例如，Mercury，Mercury，Lead）。目前，我们预测未来轨迹和充分理解这些变化的影响的能力受到对相互作用的化学，物理和生物学过程的不良理解，这些化学，物理和生物学过程塑造了我们三个海洋的功能特征和弹性。随着海洋中的时间和空间，痕量元素和同位素（TEI）的分布和变化可以提供有关关键的生物学，物理和化学过程相对于持续的全球变化的重要信息。例如，微量元素会影响生物生产力，最终影响海洋吸收人为二氧化碳并减轻气候变化的能力。同样，初级产量的空间和时间变异决定了我们的渔业产量。 TEI也是当前海洋循环的有用的地球化学示踪剂，并通过沉积记录提供有关过去海洋状况的替代信息，只能通过在现代海洋中研究TEI来理解。要进行此类研究，必须在采样过程中收集海水，而不会污染其用于微量金属的污染 - 这是一项艰巨的任务，需要专门的设备。这里要求的设备将有助于维持和扩大加拿大的能力，以可靠，清洁的海洋为TEI进行采样，并使用现代海洋学调查和过程研究所需的高空间和时间分辨率。这种能力对于允许加拿大对全球和区域研究的贡献至关重要，这将为海洋学，渔业和气候变化研究提供宝贵的信息。