Development of a Micro-Rosette Sensor for Total Dissolved Inorganic Carbon Measurement from Autonomous Lagrangian Ocean Profilers

相对于船舶而言，剖面浮标阵列提供了海洋观测数量级改进的潜力。研究海洋热量收支和大规模混合过程的物理海洋学家已经认识到这一事实，目前在海洋地球化学和生态模拟界的势头越来越大。迄今为止，将用于CO2系统的现成传感器添加到剖面浮标的尝试是无效的，因为这些装置不是以在剖面仪上操作的明确意图来构建的，并且因为目前可用的传感器限于pCO 2测量，由于pCO 2对温度和压力高度敏感并且不能被测量，因此由于缓慢的响应时间，pCO 2测量需要在深度间隔处长的停留时间以用于平衡。易于异地测量。因此，目前没有技术可用于对剖面浮标的无机碳系统进行有意义的观测。本提案中概述的微玫瑰花方法将首次允许从剖面浮标中获得溶解无机碳的剖面。PI要求提供资金以建立和测试一个新概念：在ARGO型剖面浮标上部署“微玫瑰花”。微型玫瑰花是一种专门用于在剖面浮标上运行的装置，在浮标上升期间捕获离散的海水样本，并将其储存起来供随后的化学分析使用。我们在这里重点关注的应用是总溶解无机碳（CT）的测量。这将产生CT的第一个自主的拉格朗日垂直剖面。实现一个工作原型微玫瑰花涉及一个工程组件，以开发一个低功率转盘型设备，除了化学组件负责修改和微调的一个成熟的流动注射分析方法。一个成功的项目将产生第一个自主的，拉格朗日垂直剖面的CT在上2000米，标志着一个重要的一步，发展新一代的工具，必要的，以更好地了解年度循环的碳在海洋中，除了提供直接观察海洋酸化的大面积。美国/爱尔兰研发伙伴计划下的爱尔兰和北方爱尔兰&。三个合作伙伴中的每一个都将完全从各自的国家科学资助机构获得资金。这项工作是多学科的，汇集了海洋地球化学（美国马茨）、海洋物理学（爱尔兰沃德）和微流体工程（北方爱尔兰马奎尔和麦克劳克林）方面的专门知识。 已确定的更广泛影响包括提高用于评估海洋无机碳循环当前和未来变化的数据数量，以及应用于其他分析物的巨大潜力。美国、爱尔兰和北方爱尔兰的研究人员在美国/爱尔兰研发合作伙伴计划下的合作也必须被视为一种更广泛的影响。三个合作伙伴中的每一个都将完全从各自的国家科学资助机构获得资金。努力是多元的吗？该公司是一个跨学科的公司，汇集了海洋地球化学（Martz，US）、海洋物理学（Ward，IE）和微流体工程（Maguire和McLaughlin，NI）方面的专业知识。美国和爱尔兰部分包括对全日制研究生的支持，北方尔兰爱尔兰部分将支持研究助理。

Arrays of profiling floats provide the potential for orders-of-magnitude improvement in ocean observing, relative to ships. This fact has already been realized by physical oceanographers studying the ocean heat budget and large-scale mixing processes and is now gaining momentum in the ocean biogeochemistry and ecological modeling communities. Attempts to add off-the-shelf sensors for the CO2 system to profiling floats has thus far been ineffectual because these devices were not built with the express intention of operating on profilers, and because the sensors available at present are limited to pCO2 measurements which require long dwelling times at depth intervals for equilibration due to slow response times as pCO2 is highly sensitive to temperature and pressure and cannot be easily measured ex-situ. Consequently, there is currently no technology available for meaningful observations of the inorganic carbon system from profiling floats. The micro-rosette approach outlined in this proposal will allow, for the first time, profiles of dissolved inorganic carbon from profiling floats.The PI's request funding to build and test a new concept: a "micro-rosette" to be deployed on an ARGO-type profiling float. The micro-rosette is a device intended to operate specifically on board a profiling float, capturing discrete seawater samples during float ascent and storing them for subsequent chemical analysis. The application that we focus on here is the measurement of total dissolved inorganic carbon, CT. This will result in the first autonomous, Lagrangian vertical profiles of CT. Realizing a working prototype micro-rosette involves an engineering component in order to develop a low power carousel-type device in addition to a chemistry componentresponsible for modification and fine-tuning of a proven flow injection analysis method. A successful project will result in the first autonomous, Lagrangian vertical profiles of CT in the upper 2000 m, marking a major step in development of a new generation of tools necessary to better understand annual cycles of carbon in the ocean in addition providing direct observations of ocean acidification over large areas of the ocean.This project supports an increase in the level of collaboration between researchers in the US, Ireland, and Northern Ireland under the US/Ireland R&D Partnership Program. Each of the three partners will receive funding exclusively from their respective national science funding agencies. The effort is multi-disciplinary, and brings together expertise in ocean biogeochemistry (Martz, US), ocean physics (Ward, Ireland) and microfluidics engineering (Maguire and McLaughlin, Northern Ireland).Broader Impacts: The identified broader impacts included improving the quantity of data for evaluating present and future changes in the ocean inorganic carbon cycle and the great potential for application to other analytes. The collaboration between researchers in the US, Ireland, and Northern Ireland under the US/Ireland R&D Partnership Program must also be considered a broader impact. Each of the three partners will receive funding exclusively from their respective national science funding agencies. The effort is multi?disciplinary, and brings together expertise in ocean biogeochemistry (Martz, US), ocean physics (Ward, IE) and microfluidics engineering (Maguire and McLaughlin, NI). The US and Ireland portions includes support for a full time graduate student, the Northern Ireland portion will support a research associate.