Event-Scale to Interannual Variations in Shelf Water Properties and Dynamics

提出了一项基于滑翔机的陆架斜坡动态观测研究，旨在研究风强迫和测深（简单和复杂的几何形状）在广泛的时间尺度范围内的相对作用。最初，将使用滑翔机在水深测量相对简单的区域（赫塞塔浅滩以北，沿着一条经常有人使用的水文线）占据一个跨大陆架部分。这项工作将涉及两个韦伯研究公司200米滑翔机（已拥有的PI）连续运行，以提供连续的时间序列。在第二年，PI请求支持第三个1000米能力的滑翔机加入旋转，然后将包括第二条线，在Heceta Bank南部，以测量复杂的水深测量的风驱动响应。滑翔机需要大约5天的时间来穿越每个区域，每20天的使命就有4次穿越。将把三年的剖面记录与遥感数据、系泊时间序列和数值模拟相结合，以研究水团特性、分层和沿大陆架迁移的天气带至年际变化，评价风力和水深测量如何控制沿海急流分离，并测试二维上升流和下降流锋面模型。 这项研究涉及一套重要的问题，在沿海动态使用的技术，允许全年采样。通过每隔5天重复三年的部分，抽样将捕获目标过程的多个实现。频繁的部分职业范围内的强迫条件下，将提供一个特殊的数据集，研究如何可变的风和浮力强迫与不同的底层水深相互作用，以管理沿海射流的演变。长时间序列和天气波段时间分辨率的结合将使结果具有超出通常可用的统计置信度。

A glider-based observational study of shelf-slope dynamics designed to examine the relative roles of wind-forcing and bathymetry (simple and complex geometries) over a broad range of timescales is proposed. Initially, gliders will be employed to occupy a single cross-shelf section in a region of relatively simple bathymetry (north of Heceta Bank, along a regularly-occupied hydrographic line). This effort will involve two Webb Research Corporation 200-m gliders (already owned by the PIs) operating serially to provide continuous time series. During the second year, the PIs request support for a third, 1000-m capable glider to be added to the rotation which will then include a second line, south of Heceta Bank, to measure wind-driven response over complex bathymetry. Gliders require roughly 5 days to traverse each section, yielding four crossings per 20-day mission. The three-year record of sections will be combined with remote sensing data, moored time series and numerical simulations to examine weather-band to interannual variability in water mass properties, stratification and along-shelf transport, evaluate how wind-forcing and bathymetry govern coastal jet separation and to test two-dimensional upwelling and downwelling front models. The study addresses a suite of important issues in coastal dynamics using a technology that permits year-round sampling. With three years of sections repeated at 5-day intervals, sampling will capture multiple realizations of target processes. Frequent section occupations under a range of forcing conditions will provide an exceptional data set for examining how variable wind and buoyancy forcing interact with differing underlying bathymetry to govern evolution of the coastal jet. The combination of long time series and weather-band temporal resolution will lend a statistical confidence to the results beyond that normally available.