Collaborative Research: Nearshore Canyon Experiment

合作研究：近岸峡谷实验

• 批准号: 0115850
• 负责人: Steve Elgar
• 金额: $ 77.56万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-01-01 至 2006-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0115850&HistoricalAwards=false
• 关键词: Collaborative; Research; Nearshore; Canyon; Experiment

Subject: Elgar/Herbers/Guza abstractFunds are provided for development, testing, and improvement of circulation models driven by wave propagation and wave-breaking in the presence of abrupt nearshore topography. These will be tested using data collected from a California field site with two offshore canyons. Specific objectives include: determining how surface gravity waves propagate across a complex inner shelf topography, determining how bathymetrically-induced alongshore variations of the wave field affect shoaling, breaking, and nearshore circulation, and determining the characteristics of mass exchange between the surf zone and the inner shelf in the presence of abrupt topography. Four waverider buoys over the outer and mid shelf will provide offshore wave boundary conditions for the models and characterize the refraction over the outer shelf. Pressure cells at mid shelf will identify reflected waves from Scripps Canyon. PUVs (pressure and velocity sensors) and acoustic doppler current profilers (ADCPs) over the inner shelf will characterize inner shelf and surf zone circulation and wave fields. Drifters will be deployed and tracked. Moderate wave and low wave situations will be compared in an attempt to isolate flows induced by the canyon in the absence of wave forcing. The buoys, pressure cells, and PUVs will provide estimates of the evolution of the directional wave spectrum for comparison with model output. Various inner shelf models, including the NOPP community model, will be compared to the field data.

主题：Elgar/Herbers/Guza 摘要 提供资金用于开发、测试和改进在陡峭的近岸地形中由波浪传播和波浪破碎驱动的环流模型。 这些将使用从加利福尼亚州两个近海峡谷的现场收集的数据进行测试。 具体目标包括：确定表面重力波如何在复杂的内陆架地形上传播，确定测深引起的波场沿岸变化如何影响浅滩、破碎和近岸环流，以及确定存在突变地形时冲浪区和内陆架之间的质量交换特征。 外架和中架上的四个乘波浮标将为模型提供近海波浪边界条件，并表征外架上的折射。 中部架上的压力传感器将识别来自斯克里普斯峡谷的反射波。 内陆架上的 PUV（压力和速度传感器）和声学多普勒电流剖面仪（ADCP）将表征内架和冲浪区环流和波场。 漂流者将被部署和跟踪。 将比较中波和低波情况，试图在没有波浪强迫的情况下隔离峡谷引起的水流。 浮标、压力传感器和 PUV 将提供定向波谱演变的估计，以便与模型输出进行比较。 各种内架模型，包括 NOPP 群落模型，将与现场数据进行比较。