Collaborative Research: Benthic Observatory and Technology Test Bed on the Midshelf - Understanding Processes

P.I.Savidge，William(Slide)提案#：0536326项目标题：中陆架海底观测站和技术试验床-理解过程项目摘要PI建议扩充现有的观测站阵列，以研究沙质沉积物中的海底交换。现有的观测阵列将增加一系列传感器，旨在测量海床附近、海底和海床以下的流体作用力和物理和地球化学反应。一些传感器代表现有技术，一些传感器代表相对较新的开发技术，其他传感器将作为该项目的一部分进行开发、测试和部署(海底热敏电阻和氧化还原传感器阵列、海底叶绿素荧光成像)。目前的仪器包括气象包、ADCP、表层和底层CTDS、荧光计和PAR传感器。该观测站仪器将用来描述海床对一系列时间尺度上的物理作用力的反应。将在水柱内探测到能量事件的频率、强度和时间，并将跟踪它们在大气层边界层中的表现。BBL仪器将测量床面运动阈值和表征近床面悬移质，并将用于估计界面上的压力场和平流通量。现场地球化学传感器将被用来表征沉积物内特性的平流率，并将这些特性与界面上方的物理强迫和由季节性和昼夜线索驱动的生物强迫联系起来。仪器和观测战略的结合将对可渗透沉积物中海底交换过程的原因和后果产生一个全面的描述。

P.I. Savidge, William (Skid) Proposal #: 0536326PROJECT TITLE: Benthic Observatory and Technology Testbed On the Mid Shelf-Understanding ProcessesProject SummaryThe PIs propose to augment an existing observatory array to investigate benthic exchange in sandy sediments. The existing observational array will be augmented with an assortment of sensors designed to measure fluid forces and physical and geochemical responses near, at, and below the seabed. Some sensors represent existing technology, some represent relatively new technology in development, and others will be developed, tested, and deployed as part of this project (subseabed thermistor and redox sensor arrays, benthic chlorophyll fluorescence imaging). Present instrumentation includes meteorological packages, ADCPs, surface and bottom CTDs, fluorometers and PAR sensors. The observatory instrumentation will be used to characterize the seabed response to physical forces acting across a spectrum of time scales. The frequency, intensity, and timing of energetic events will be detected within the water column, and their manifestation within the BBL will be followed. BBL instrumentation will measure thresholds of bed motion and characterize near-bed suspended loads, and will be used to estimate pressure fields and advective fluxes at the interface. In situ geochemical sensors will be used to characterize rates of advection of properties within the sediment and connect those properties to both physical forcing above the interface and biological forcing driven by seasonal and diurnal cues. The combination of instrumentation and observational strategies will produce a holistic portrait of the causes and consequences of benthic exchange processes in permeable sediments.