COLLABORATIVE RESEARCH:The Propagating Response of the Inner Shelf to Wind Relaxations in a Coastal Upwelling System

合作研究：沿海上升流系统中内陆架对风弛豫的传播响应

• 批准号: 1311283
• 负责人: Mark Moline
• 金额: $ 32.24万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1311283&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Propagating; Response; Inner

The project is a comprehensive observational and analytical program to examine the dynamics and source waters of the relaxation flows in a coastal upwelling system on the central California coast. Autonomous vehicles, high-frequency radars, moorings, and drifters, will be used to acquire pressure, density, and velocity data relevant to the relaxation flows. The data will be used to determine spatial scales of the flows, cross-shore density structure, cross-shore and alongshore velocity fields, pressure gradients, and the region of contact with the sea floor. Aspects of the research include: 1) to evaluate the roles of barotropic and baroclinic pressure gradient forcing, 2) to identify regions where ageostrophic flows dominate the cross-shore and alongshore momentum balances, 3) to determine source waters for the relaxation flows, and 4) to examine the inner shelf circulation response to wind relaxations over an extensive coastal region (the northern part of the Southern California Bight) by analyzing extensive regional data sets collected over many years.Wind relaxations are common features of coastal upwelling systems worldwide, and have impacts on alongshore and cross-shore transport of water-borne materials such as larvae, nutrients, terrestrial runoff, and buoyant pollutants like oil. This study will clarify the role of relaxation flows in the recruitment of intertidal and sub-tidal organisms by revealing details of the near-shore flow structure. The observational plan advances capabilities of state-of-the-art autonomous and Lagrangian platforms and sensors. A post-doc and undergraduate students will be trained. Opportunities will be created for marine ecology graduate students to conduct field experiments focused on the ecological consequences of relaxation flows. This research will build on, and leverage, existing regional ocean observing infrastructure and it will increase the capacity for oceanographic studies at two universities.

该项目是一个全面的观测和分析计划，以检查在中央加州海岸的沿海上升流系统的松弛流的动力学和源沃茨。自动驾驶汽车、高频雷达、系泊设备和漂移器将用于获取与松弛流相关的压力、密度和速度数据。这些数据将用于确定水流的空间尺度、跨岸密度结构、跨岸和沿岸速度场、压力梯度以及与海底接触的区域。 研究的方面包括：1）评估正压和斜压压力梯度强迫的作用，2）确定非地转流主导跨岸和沿岸动量平衡的区域，3）确定松弛流的源沃茨，4）在一个广阔的沿海地区考察内陆架环流对风松弛的响应（南加州湾北方部分）的风松弛是世界范围内海岸上升流系统的共同特征，并对沿岸和跨海岸的水载物质，如幼虫，营养物，陆地径流，和漂浮的污染物如石油。本研究将通过揭示近岸流结构的细节，阐明弛豫流在潮间带和潮下生物补充中的作用。该观测计划提高了最先进的自主和拉格朗日平台和传感器的能力。将培养一名博士后和一名本科生。将为海洋生态学研究生创造机会，进行实地实验，重点是放松流的生态后果。 这项研究将利用现有的区域海洋观测基础设施，并将提高两所大学的海洋学研究能力。