Old Dominion University/Synthetic Conducting Cable for Trace Metal-clean Sampling Winch SSSE

请求购置一条8000米长、直径14毫米的合成(Vectran)电缆，这是一个微量金属清洁海洋采样系统的一部分。它将更换现有的一根已有12年历史的电缆，该电缆在北冰洋、大西洋和太平洋的水样采集过程中遭到损坏。微量元素对世界海洋的生物和化学过程至关重要，因为它们是基本的微量营养物质或毒物。然而，传统的海洋采样方法会污染这些成分的水样。不幸的是，严格的痕量金属清洗程序是劳动密集型的，需要专门的设备，而且非常慢，限制了我们在洋盆尺度上研究痕量元素的能力。作为国际GEOTRACES计划的一部分，利用美国国家科学基金会的资金开发了一种玫瑰花结/CTD采样系统，该系统可以进行快速、高分辨率的微量元素采样。由于电缆是样品瓶上方唯一的东西，它必须是非金属线，以确保样品的质量，同时仍与传统的CTD/玫瑰花结一样快。现有的电缆在使用了10年后已经损坏，必须更换才能继续在世界海洋中进行高分辨率的微量元素采样。在接下来的三年里，有两个由NSF资助的邮轮需要这种电缆。对SSSE计划的要求是：1)合成导电CTD电缆，8000 m x 14 mm$180,340更广泛的影响本提案的主要影响是根据提案指南(NSF 19-602)的优点审查标准2。它为科学家提供基础设施支持，以使用该船及其共享仪器，以支持他们由NSF资助的海洋研究项目(这些项目单独接受NSF相关研究计划的单独审查)。共享仪器的获取、维护和操作允许美国国家科学基金会资助的任何美国大学或实验室的研究人员获得用于其研究的工作、校准的仪器，从而降低研究成本，并扩大潜在研究人员的基础。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

A request is made for the acquisition of an 8000 m long, 14 mm diameter synthetic (Vectran) conducting cable that is part of a trace metal-clean oceanographic sampling system. It would be replacing an existing 12-year-old cable that has been damaged during water sampling in the Arctic, Atlantic, and Pacific Oceans. Trace elements are crucial to biological and chemical processes in the world’s oceans due to their roles as essential micro-nutrients or toxicants. However, conventional oceanographic sampling methods contaminate water samples for these constituents. Unfortunately, rigorous trace metal-clean procedures are labor-intensive, require specialized equipment, and are very slow, limiting our ability to study trace elements on ocean basin scales. As a part of the international GEOTRACES program a rosette/CTD sampling system that allows rapid, high resolution trace element sampling was developed using NSF funding. Since the cable is the only thing above the sample bottles, it has to be non-metallic wire to assure quality samples while still being as fast as that of conventional CTD/rosettes. The existing cable has been damaged after 10 years of use and must be replaced to continue high resolution trace element sampling in the world's oceans. There are two NSF-funded cruises in the next three years that require this cable. The request to the SSSE Program is:1) Synthetic conducting CTD cable, 8000 m x 14 mm $180,340 Broader ImpactsThe principal impact of the present proposal is under Merit Review Criterion 2 of the Proposal Guidelines (NSF 19-602). It provides infrastructure support for scientists to use the vessel and its shared-use instrumentation in support of their NSF-funded oceanographic research projects (which individually undergo separate review by the relevant research program of NSF). The acquisition, maintenance and operation of shared-use instrumentation allows NSF-funded researchers from any US university or lab access to working, calibrated instruments for their research, reducing the cost of that research, and expanding the base of potential researchers.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.