Collaborative Research: Lagrangian Studies of the Transport

P.I.Chant，Robert(Rutgers)提案#：0238957建议标题：合作研究：浮力羽流中营养物质和污染物金属的传输、转化和生物影响的拉格朗日研究项目摘要PI提出了一个现场和数值实验的协调方案，以研究控制营养物质和化学污染物在哈德逊河羽流中的去向和传输的过程。像这样的城市河口羽流是营养物质和化学污染物向沿海海洋输送的主要途径。这种物质的命运和运输不仅受到羽流动力学的控制，而且还受到与羽流动力学相耦合的生物和化学过程的控制。为了研究这些过程，PIS建议进行一系列的染料实验，并使用拖车进行连续的正在进行的化学和生物采样。这些实验将在LEO-15观测站的框架内进行，以便通过将拉格朗日调查与来自卫星图像、地表洋流和远场次表层水文学的全陆架观测联系起来，对染料研究进行解释。LEO-15将通过系泊仪器的交叉架阵列进行扩充，以提供对潮下环流、层结和雷诺应力的详细估计。此外，数据同化数值模拟将在现场试验期间提供高分辨率和逼真的沿海海洋后遗症。模拟将染料示踪剂数据同化到三维沿海环流模式中，并指导未来将其他示踪剂同化到具有复杂源和汇的环流模式中的努力。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以及从拉格朗日角度对生物和化学相互作用的量化，以提供一种手段来评估它们在确定营养物质和化学污染物在浮力羽流中的去向和运输方面的重要性。拟议的实验计划将对比哈德逊羽流在上升和下降条件下的物理、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新泽西海岸和大西洋中部海湾烟羽中污染物的范围和生物影响，并将提高预测污染物的去向和迁移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.