Collaborative Research: Benthic Boundary Layer Geochemistry and Physics at the Kilo Nalu Observatory

P.I. Pawlak，尤金（UH）提案编号：0536616项目名称：基洛纳鲁观测站的底栖边界层地球化学和物理学项目摘要PI建议沿着夏威夷州奥陶洛斯南海岸建立一个综合系统。该网站包括：现有的观测系统有电力和高带宽通信;动态、高渗透性和海洋地球化学活跃的海底;靠近深海，经常暴露于近海地球化学和内部潮汐和中尺度涡旋驱动的可变物理作用力;广泛和可预测的表面波条件;以及预测重大表面波事件到达的能力，从而大大有助于实验规划、仪器部署和事件驱动采样的实施。拟议研究的目标是大大提高测量溶质进出渗透性沉积物的能力，研究海底对各种物理海洋学强迫的反应，并确定远洋生态系统对这些过程的反应。研究所提议在10-40米深处建立一个物理传感器阵列，收集各种海洋条件下的高分辨率时间和空间物理数据;测量整个阵列中地球化学重要成分的孔隙水浓度;测量各种条件下桑迪和硬底渗透性海底的孔隙水交换;将这些孔隙水-海水通量与使用涡动相关和水柱剖面技术计算的通量进行比较;检查水柱中对物理驱动的沉积物营养物通量的光学（生物）反应;并确定地表水中CO2系统的动态。这些任务将使他们能够解决海底边界层系统对环境变化的物理和地球化学反应。

P.I. Pawlak, Eugene (UH) Proposal #: 0536616PROJECT TITLE: Benthic Boundary Layer Geochemistry and Physics at the Kilo Nalu ObservatoryProject SummaryThe PIs propose to establish an integrated system along the south coast of Oahu, Hawaii. This site includes: an existing observing system with power and high bandwidth communications; a dynamic, highly permeable and biogeochemically active seafloor; is in close proximity to the deep ocean, which provides regular exposure to offshore geochemistry and variable physical forcing driven by internal tides and mesoscale eddies; a wide and predictable range of surface wave conditions; and the ability to forecast the arrival of significant surface wave events, thus greatly aiding the planning of experiments, deployment of instruments and implementation of event-driven sampling. The goal of the proposed research is to significantly advance the ability to measure transport of solutes into and out of permeable sediments, examine the seafloor's response to a wide range of physical oceanographic forcing, and determine the pelagic ecosystem response to these processes. The PIs propose to establish an array of physical sensors over depths of 10-40 m, collect high resolution temporal and spatial physical data over a range of oceanographic conditions; measure porewater concentrations of biogeochemically important constituents across the array; measure porewater exchange under a range of conditions, at both sandy and hard-bottom permeable seafloors; compare these porewater-seawater fluxes with those calculated using eddy correlation and water column profiling techniques; examine the optical (biological) response in the water column to physically driven sediment fluxes of nutrients; and determine the dynamics of the CO2 system in the surface water. Together, these tasks will enable them to resolve the physical and geochemical responses of benthic boundary layer systems in response to environmental changes.