Directional Phase-Resolved Broadband Observations of Breaking Waves

碎波的定向相位分辨宽带观测

• 批准号: 2319116
• 负责人: Leonel Romero
• 金额: $ 71.22万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-01 至 2026-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2319116&HistoricalAwards=false
• 关键词: Directional; Phase; Resolved; Broadband; Observations

Wave breaking regulates fluxes of energy, momentum, and mass across the air-sea interface, all of which are important for weather and climate. Breaking is multiscale and highly nonlinear and therefore is not analytically trackable. Much of our understanding is statistical, built on theoretical constraints and laboratory, numerical, and field experiments. Despite recent advances, our ability to predict breaking remains limited, and the directional spread of the wave spectrum is an important factor that has not been well studied. Recent studies show that wave-breaking dissipation timescales are not uniform in all directions, and through non-linear resonant interactions with waves, it contributes to the directional spread of waves shorter than the dominant wavelength. This project will measure waves and wave-breaking, including their spread in both wavelengths and directions, from a fixed tower, in order to better understand these resonant interactions. The data and code generated will be available online with open access. Results from this project will be incorporated into courses in Physical Oceanography and Air-Sea Interaction. The project will support a graduate student and at least one undergraduate student will participate in an undergraduate research project. The project will support the research of a Hispanic investigator, who is a mentor in a pilot program at UConn serving students of traditionally underrepresented communities. The results from this study will be used to generate educational material for outreach activities and events within the local community, including the yearly event Ocean Week at local elementary schools for 2nd-year students, and the Young Explorer Science program which provides research and science exposure to high school students within underrepresented communities of the Groton/New London area.The overarching goal of this proposal is to improve the understanding of directional wave-breaking kinematics and their impact on the dynamics to constrain and improve spectral breaking dissipation parameterizations and ultimately improve wave spectral models. Coincident measurements will be made of the directional energy spectrum and directional breaking kinematics using stereo infrared and visible imagery from Martha’s Vineyard Coastal Observatory Air-Sea Interaction Tower. Observations will be made under a wide range of conditions including high winds (10 m/s), misaligned winds, and dominant waves allowing for a detailed characterization of the two-dimensional breaking kinematics and dynamics over a wide range of scales. Additionally, the project will characterize the breaking probability anisotropically; quantify kinematic wave-breaking onset criterion; analyze the directional energy balance of short gravity waves; and constrain and improve wave-breaking dissipation parameterizations.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

波浪破裂可调节整个空气界面的能量，动量和质量的通量，所有这些都对天气和气候都很重要。破裂是多尺度和高度非线性的，因此在分析上无法跟踪。我们的大部分理解都是统计的，基于理论约束和实验室，数值和现场实验。尽管有最近的进步，但我们预测破裂的能力仍然有限，并且波谱的方向扩散是尚未得到充分研究的重要因素。最近的研究表明，在各个方向上，波浪破坏性耗散时间尺度并不统一，通过与波浪的非线性谐振相互作用，它有助于波长短波的方向扩散。该项目将测量波浪和破浪，包括它们从固定塔中的波长和方向上的传播，以更好地了解这些共鸣的相互作用。生成的数据和代码将在线提供，并开放访问。该项目的结果将纳入物理海洋学和空气相互作用的课程中。该项目将支持研究生，至少一名本科生将参加一个本科研究项目。该项目将支持西班牙裔调查员的研究，他是UConn试点计划的精神，为传统代表性不足的社区提供服务。这项研究的结果将用于为当地社区内的外展活动和活动生成教育材料，包括在当地小学的年度活动海洋周，为二年级的学生举行的年度活动海洋周，以及年轻的探险家科学计划，该计划提供了研究和科学的研究和科学，向高中生的高中生提供了代表性不足的格罗顿/新伦敦地区的范围内的范围，以改善这一提议的范围，以改善该促销的动态，以改善kin的发展。并改善频谱破裂参数，并最终改善波光谱模型。将使用玛莎葡萄园沿海天文台天文台气海交互塔的立体红外和可见图像进行定向的能量光谱和定向运动学的指示测量。将在各种条件下进行观察，包括大风（10 m/s），未对准的风和主要的波浪，可以详细描述二维破裂运动学和动力学，并在广泛的尺度上进行。此外，该项目将以各向异性为特征。量化运动波动的发作标准；分析短重力波的定向能量平衡；这一奖项反映了NSF的法定任务，并通过基金会的智力优点和更广泛的审查标准来诚实地支持NSF的法定任务。