Infrared Remote Sensing of Cooling Whitecap Foam to Quantify Wave Breaking and Aeration

红外遥感冷却白浪泡沫以量化波浪破碎和通气

• 批准号: 2048616
• 负责人: Carmine Chickadel
• 金额: $ 53.24万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-03-01 至 2025-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2048616&HistoricalAwards=false
• 关键词: Infrared; Remote; Sensing; Cooling; Whitecap

Wave breaking plays a critical role in air-sea interaction processes in both the open ocean and the surf zone. Energy and momentum transferred from the atmosphere to the ocean through wind-wave generation is ultimately dissipated by waves. The resulting turbulence in the upper ocean causes mixing, and in the nearshore momentum transfer can force currents. Improved understanding of the bubble and foam formation processes during wave breaking is needed to better understand the impacts of wave breaking. The goal of this project is to develop and utilize a remote sensing technique to study bubble plume formation and associated wave breaking energy dissipation by exploiting the thermal signature of cooling residual foam left behind by the breaking process. A large-scale, outdoor laboratory experiment will be conducted to evaluate the technique for field-scale breaking waves and explore the effect of wave breaking type, breaking strength, and bubble distribution.The investigators hypothesize that the time from when breaking begins to when the residual foam starts to cool provides a measure of both the bubble plume decay time and depth, which can be used to determine bubble characteristics and evaluate existing plume models related to the wave energy dissipation rate. Prior results indicate that the foam cooling time can be used to map the spatial variability of bubble plume depth and thus provide the spatially varying bubble plume volume. This project will use thermal infrared (IR) imagery and ancillary measurements to investigate and further establish these relationships. The resulting ability to remotely quantify bubble plume properties and energy dissipation due to wave breaking will provide a new and transformative tool for investigating and understanding the air-sea interaction processes driven by wave breaking in the open ocean and the surf zone.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.

波浪破裂在开阔海洋和冲浪区的空气交互过程中起着至关重要的作用。波浪最终通过波浪从大气中传递到海洋的能量和动量最终被波浪消散。上海上产生的湍流会导致混合，并且在近海动量转移会迫使电流。需要在波浪破裂过程中提高对气泡和泡沫形成过程的了解，以更好地理解波浪破裂的影响。该项目的目的是开发和利用遥感技术来研究气泡羽状形成和相关的波浪破坏能量耗散，从而利用破裂过程留下的冷却残留泡沫的热特征。将进行大规模的户外实验室实验，以评估现场尺度断裂波的技术，并探索波浪破裂类型，断裂强度和气泡分布的效果。研究人员假设从断裂开始的时间开始，从断裂开始到残留泡沫开始何时可以评估泡沫的时间，以确定潮流的时间，以确定泡沫衰变的时间和范围，以确定泡沫衰变的时间，并衡量泡沫衰变的量耗散率。先前的结果表明，泡沫冷却时间可用于绘制气泡羽状深度的空间变异性，从而提供空间变化的气泡羽流量。该项目将使用热红外（IR）图像和辅助测量来研究并进一步建立这些关系。由此产生的能力量化气泡羽状特性和由于波浪破裂而引起的能量耗散的能力将提供一种新的和变革性的工具，用于调查和理解由开阔的海洋和冲浪区破裂驱动的空气 - 海洋相互作用过程。该奖项反映了NSF的法定任务，并通过使用基金会的智力效果和宽阔的影响来评估NSF的法定任务，并具有值得评估的支持。