COLLABORATIVE RESEARCH: Lagrangian studies of the transport, transformation, and biological impact of nutrients and contaminant metals in a buoyant plume: A process study ...

P.I. Chant, Robert （Rutgers）提案编号：0238957提案标题：合作研究：漂浮羽流中营养物质和污染物金属的运输、转化和生物影响的拉格朗日研究项目摘要：PIs提出了一个现场和数值实验的协调计划，以检查控制哈德逊河羽流中营养物质和化学污染物的命运和运输的过程。像这样的城市河口羽流代表了向沿海海洋输送营养物质和化学污染物的主要途径。这些物质的命运和运输不仅受到地幔柱动力学的控制，而且还受到与地幔柱动力学耦合的生物和化学过程的控制。为了研究这些过程，pi建议进行一系列染料实验，同时使用拖车进行连续的化学和生物采样。这些实验将在LEO-15天文台的框架内进行，以便通过将拉格朗日调查与卫星图像、地表水流和远场地下水文的全大陆架观测结合起来，对染料研究进行解释。LEO-15将通过跨大陆架系泊仪器阵列进行增强，以提供对潮下环流、分层和雷诺应力的详细估计。此外，数据同化的数值模拟将提供高分辨率的近岸海洋实况预报。该模型将把染料示踪剂数据吸收到三维沿海环流模型中，并指导未来将其他示踪剂吸收到具有复杂源和汇的环流模型中。这项工作的主要目的是区分在浮力羽流中运输/混合物质的物理过程与生物和化学转化过程之间的区别，以及从拉格朗日的角度对生物和化学相互作用进行量化，以提供一种方法来评估它们在确定浮力羽流中营养物质和化学污染物的命运和运输中的重要性。拟议的实验计划将对比哈德逊羽流在上升流和下升流条件下的物理、生物和化学过程的反应。这项工作的一个主要成果将是确定沿新泽西海岸和中大西洋湾的羽流中污染物的范围和生物影响，并将提高预测污染物的命运和运输以及它们进入沿海海洋食物链底部的速度的能力。

P.I. Chant, Robert (Rutgers) Proposal #: 0238957Proposal Title: COLLABORATIVE RESEARCH: Lagrangian studies of the transport, transformation, and biological impact of nutrients and contaminant metals in a buoyant plume Project Summary The PIs propose a coordinated program of field and numerical experiments to examine processes that control the fate and transport of nutrients and chemical contaminants in the Hudson River plume. Urban estuarine plumes such as this one represent a major pathway for the transport of nutrients and chemical contaminants to the coastal ocean. The fates and transports of this material are controlled not only by the plume dynamics but also by biological and chemical processes coupled to the dynamics of the plume. To investigate these processes, the PIs propose to conduct a series of dye experiments along with continuous underway chemical and biological sampling using a towed vehicle. These experiments will occur within the framework of the LEO-15 Observatory to enable interpretation of the dye study by placing the Lagrangian surveys in context with shelf-wide observations from satellite imagery, surface currents and far-field subsurface hydrography. LEO-15 will be augmented by a cross shelf array of moored instruments to provide detailed estimates of subtidal circulation, stratification and Reynold stresses. In addition, data-assimilative numerical simulations will provide high resolution and realistic hindcasts of the coastal ocean during the field experiments. The modeling will assimilate the dye-tracer data into a 3-D coastal circulation model and guide future efforts to assimilate other tracers into circulation models with complex sources and sinks. The major aims of this work are to distinguish between physical processes that transport/mix material in a buoyant plume from biological and chemical transformation processes as well as the quantification of biological and chemical interactions in a Lagrangian perspective to provide a means to assess their importance in determining the fate and transport of nutrients and chemical contaminants in a buoyant plume. The proposed experimental plan will contrast the response of physical, biological, and chemical processes in the Hudson plume during upwelling and downwelling conditions. A major outcome of this work will be the determination of the extent and biological impact of contaminants in the plume along the New Jersey coast and Middle Atlantic Bight and will improve the ability to predict the fate and transport of contaminants and the rate that they enter the base of the food chain in the coastal ocean.