CAREER: Airflow Separation Above Wind-Waves

本项目是一个集科研和教育于一体的项目，旨在提高我们对海洋表面波以上气流分离对海气动量通量的影响的理解，并使少数民族高中生接触到地球科学领域。理论价值：海气耦合边界层在海洋和大气之间的多重通量中起着重要作用。特别是对海洋的压力（阻力）？S面是短期预报和长期全球气候趋势模拟的关键参数。然而，气流分离的影响还没有得到很好的理解。例如，虽然飓风路径预报在过去几年有了显著改善，但飓风强度预报自1970年以来基本没有变化。这在一定程度上是由于缺乏对气流分离时海气动量流动的复杂物理学的理解。提出的研究方案涉及气流分离对海气动量通量的影响。具体来说，研究者将进行实验室和可能的现场实验，以检查波浪上方分离气流的详细结构，以确定导致气流分离的过程和因素（波长、坡度、相位、不对称性……），并评估气流分离对海气动量平衡的影响。在受控的实验室环境中获得关键的物理洞察力后，通过在波上方获取PIV速度数据以及表面速度和破碎波的热成像测量来对分离气流结构进行现场测量的可行性。配套的涡动相关通量包和测高系统也将部署。更广泛的影响：这项研究的更广泛的影响将包括提高对海洋和大气耦合的理解，这将导致更好的天气和气候耦合模型。我们预测季节波动和长期气候变化的能力对渔业、农业、能源工业和商品市场、建筑业和保险业以及灾害/威胁防范都有重要影响。这项研究的结果将在专业期刊出版物和会议上传播，并酌情在更受欢迎的出版途径上传播。该项目的教育部分具有明显的更广泛的影响，通过PI在特拉华大学建立的外展项目中教授的课程开发，为有前途的少数民族高中生提供直接接触物理科学领域的机会。这些材料将进一步发展成为海洋学的高中教学模块，并将通过基于网络的界面和海洋与地球研究学院目前举办的年度研讨会分发给当地科学教师。在适当的情况下，这将与PI正在进行的研究相结合。S实验室。这些活动将为学生提供更好的科学意识，作为一个潜在的职业选择，并提高他们对科学领域的一般知识。该项目还将成为研究生博士研究的基础，并将为实验室的本科生项目和本科生暑期研究员提供材料和设施。研究者将继续努力通过实验室参观和对公众的信息科学讲座、公共讲座的网络广播和特别活动，向更广泛的受众（K-12和公众）推广科学和研究。

This CAREER project is an integrated program of research and education that will improve our understanding of the effects airflow separation above the ocean surface waves on the air-sea flux of momentum, and expose minority high school students to geosciences fields.Intellectual Merit: The coupled air-sea boundary layers play an important role in the multiple fluxes between the ocean and the atmosphere. In particular the stress (drag) on the ocean?s surface is a crucial parameter for both short term forecasting and the modeling of long-term global climate trends. However, the effects of airflow separation are not well understood. For example, while hurricane track forecasts have significantly improved in the past few years, hurricane intensity forecasts are essentially unchanged since 1970. This is in part due to a lack of understanding of the complex physics involved in the air-sea fluxes of momentum when airflow separation is present. The proposed research program is concerned with the role of airflow separation in influencing the air-sea momentum flux. Specifically, the investigator will perform laboratory and possibly field experiments to examine the detailed structure of the separated airflow above the waves in order to determine what processes and factors (wavelength, slope, phase, asymmetry...) lead to airflow separation, and assess the impact of airflow separation on the air-sea momentum balance.After gaining critical physical insight in the controlled laboratory environment, the feasibility of making field measurements of the separated airflow structure by taking PIV velocity data above the waves along with thermographic measurements of surface velocity and breaking waves. A supporting eddy covariance flux package and altimetry systems will also be deployed. Broader Impact: The broader impact of this research will include an improved understanding of the coupling of the oceans and the atmosphere, which will lead to better coupled models of weather and climate. Our ability to predict seasonal fluctuations and secular climate change has an important impact on fisheries, agriculture, the energy industry and commodity markets, the construction and insurance industries, and disaster/threat preparedness. Results from this research will be disseminated in professional journal publications and conferences, and, where appropriate, more popular avenues of publication. The educational component of this project has obvious broader impacts with direct exposure to Physical Sciences fields for promising minority high school students through the development of a curriculum to be taught by the PI in an established outreach program at the University of Delaware. The material will be further developed into high school teaching modules in Oceanography which will be distributed to local science teachers via a web based interface and the annual workshop currently held by the College of Marine and Earth Studies. Where appropriate, this will be integrated with ongoing research in the PI?s laboratory. . These activities will provide students with a better sense of science as a potential career choice as well as improve their general knowledge of the scientific fields. The project will also form the basis for the doctoral research of a graduate student and will provide material and provide facilities for undergraduate projects and undergraduate summer fellows in the laboratory. The investigator will continue his efforts to promote science and research to a broader audience (K-12 and public) through laboratory visits and informational scientific talks to the public, web broadcasting of public lectures, and special events.