CMG COLLABORATIVE RESEARCH: Wave Breaking Dissipation Modeling and Parametrization in Wave/Current Interactions

CMG 合作研究：波浪/水流相互作用中的破波耗散建模和参数化

• 批准号: 0723757
• 负责人: James McWilliams
• 金额: $ 28.49万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0723757&HistoricalAwards=false
• 关键词: CMG; COLLABORATIVE; RESEARCH; Wave; Breaking

Beach erosion and pollution in our near shores, tsunamis and other rogue waves and their impact on maritime activities and on flooding of low lands, oceanic currents and oceanic thermodynamic exchanges: all of these are examples of dynamic oceanic processes of clear practical interest, with regard to their impact on our environment and on human activities. They have been listed above in order of increasing spatio-temporal scales.Science has been able to develop an understanding of certain key features of each of the above problems, in isolation, exploiting scale differences. Our general thrust is to develop ways to understand the interaction of these scales, as it is clear that none of the examples mentioned above happen without having a bearing on each other.A fundamental multi-scale interaction is that of waves and currents. Our research specifically aims to develop models of these complex interactions, and with these models, an understanding of oceanic dynamics at many scales simultaneously.We build upon our past successes to make new inroads into the problem: a specific theoretical thrust is to find how wave breaking and dissipation affects waves and currents and how these are to be modeled. Another theoretical thrust is to devise ways in which field data can complement models, particularly data that is captured by drifters and path-based measuring devices. On the practical side, we are revisiting classical problems, such as the occurrence of rip currents and long shore currents to examine how our new understanding of waves and currents modifies our knowledge of how these oceanic processes take place. On the operational side, we are also implementing the knowledge gained in these key problems into existing oceanic general circulation models (ROMS), which are being developed for improved regional oceanic forecasting.

我们近岸的海滩侵蚀和污染、海啸和其他无赖海浪及其对海洋活动和低地洪水、洋流和海洋热力交换的影响：所有这些都是具有明显实际意义的海洋动态过程的例子，它们对我们的环境和人类活动的影响。它们是按照时空尺度递增的顺序列在上面的。科学已经能够孤立地、利用尺度差异来理解上述每个问题的某些关键特征。我们的主要目的是找到理解这些尺度相互作用的方法，因为很明显，上述所有例子都是相互影响的。基本的多尺度相互作用是波和流的相互作用。我们的研究特别旨在开发这些复杂相互作用的模型，并利用这些模型同时在多个尺度上理解海洋动力学。我们在过去的成功基础上对这个问题取得新的进展：一个具体的理论主旨是找出海浪破碎和消散如何影响波浪和海流，以及如何对这些进行建模。另一个理论主旨是设计一种方法，使现场数据可以补充模型，特别是由漂流者和基于路径的测量设备捕获的数据。在实践方面，我们正在重温经典问题，如激流和长岸流的发生，以研究我们对波浪和洋流的新理解如何修改我们对这些海洋过程如何发生的知识。在业务方面，我们还正在将在这些关键问题上获得的知识应用到现有的海洋环流模式中，这些模式正在开发中，以改进区域海洋预报。