Collaborative Research: A Laboratory Experiment to Quantify the Impact of Whitecap Foam on Air-Sea Momentum Transfer

合作研究：量化白帽泡沫对海气动量传递影响的实验室实验

• 批准号: 2049031
• 负责人: Brian Haus
• 金额: $ 14.71万
• 依托单位: University of Miami
• 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: 2021-07-15 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2049031&HistoricalAwards=false
• 关键词: Collaborative; Research; Laboratory; Experiment; Quantify

This project is motivated by the need to improve parameterization of air-to-sea momentum fluxes. This research is expected to result in an in-depth understanding of the impact whitecap foam has on momentum transfer at the air-sea interface. The impact of whitecap foam on air-sea momentum flux will be studied in the laboratory environment using the Air-Sea Interaction Saltwater Tank (ASIST) at the University of Miami. The results will lead to improved parameterization of the momentum transfer at the air-sea interface which is important for ocean and climate modeling, hurricane forecasting, and modeling waves which effect coastal erosion and offshore energy.This project will quantify the impact of whitecap foam on air-sea momentum transfer using the Air-Sea Interaction Saltwater Tank (ASIST) at the University of Miami. Foam will be generated by purging air through gas permeable tubing to imitate residual foam which lingers on the surface after a wave has broken. Wind will then be blown over the foam patch and turbulent momentum flux measured at two locations downwind for comparison to clean, foam-free water. The experiment will be conducted using a range of wind speeds and foam areas. Both fresh water and natural sea water will be used and bubble size and stability will be adjusted by altering surfactant concentrations. The outcome of this research will be a quantification of the impact whitecap foam has on air-sea momentum transfer by altering the surface roughness over a variety of conditions.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.

该项目的动机是需要改进海气动量通量的参数化。这项研究有望深入了解白顶泡沫对海气界面动量传递的影响。将利用迈阿密大学的海气相互作用盐水箱在实验室环境中研究白顶泡沫对海气动量通量的影响。结果将导致改进的参数化的动量传递在海气界面，这是重要的海洋和气候模拟，飓风预报，并模拟波的影响海岸侵蚀和近海能源。该项目将量化的影响白顶泡沫海气动量传递使用的空气-海洋相互作用盐水罐（ASIST）在迈阿密大学。泡沫将通过透气管吹扫空气来产生，以模拟波浪破碎后残留在表面上的残余泡沫。然后将风吹过泡沫补丁，并在顺风的两个位置测量湍流动量通量，以与清洁的无泡沫水进行比较。该实验将使用一系列风速和泡沫面积进行。将使用淡水和天然海水，并通过改变表面活性剂浓度来调节气泡大小和稳定性。这项研究的结果将是通过改变各种条件下的表面粗糙度来量化白顶泡沫对海气动量传递的影响。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。