CAREER: Airflow Separation Above Wind-Waves

职业：风浪上方的气流分离

• 批准号: 0748767
• 负责人: Fabrice Veron
• 金额: $ 43.17万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-03-01 至 2014-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0748767&HistoricalAwards=false
• 关键词: CAREER; Airflow; Separation; Above; Wind

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.

该职业项目是一项研究和教育的综合计划，它将提高我们对海面波动上方的气流分离的理解，对动量的空气平报，并使少数族裔高中生接触到地球科学领域。智能优点：耦合的空气海岸边界层在海洋和大气层之间的多重磁通中起着重要作用。特别是，海洋表面的应力（阻力）是短期预测和长期全球气候趋势建模的关键参数。但是，气流分离的影响尚不清楚。例如，尽管在过去的几年中，飓风轨道的预测有了显着改善，但自1970年以来，飓风强度预测基本上没有改变。这部分是由于缺乏对存在气流分离时动量的复杂物理学的了解。拟议的研究计划涉及气流分离在影响空气动量通量中的作用。具体而言，研究人员将执行实验室和可能的现场实验，以检查波浪上方的分离气流的详细结构，以确定哪些过程和因素（波长，斜率，相位，相对，不对称...）的分离，导致气流分离对空气势的影响，从而导致空气流量的影响。波浪速度数据以及表面速度和断裂波的热量表测量。还将部署支持涡流协方差软件包和高度学系统。更广泛的影响：这项研究的更广泛影响将包括对海洋和气氛的耦合的改进理解，这将导致更好的天气和气候模型。我们预测季节性波动和世俗气候变化的能力对渔业，农业，能源行业和商品市场，建筑和保险行业以及灾难/威胁准备都有重要影响。这项研究的结果将在专业期刊出版物和会议上传播，并且在适当的情况下，出版物的出版物途径更为流行。该项目的教育组成部分具有更大的广泛影响，直接接触物理科学领域，可以通过开发在特拉华大学的既定外展计划中教授的课程来为有前途的少数族裔高中学生提供。该材料将进一步发展为海洋学中的高中教学模块，该模块将通过基于Web的界面和海洋和地球研究学院目前举行的年度研讨会分发给当地科学教师。在适当的地方，这将与PI实验室正在进行的研究集成。 。这些活动将为学生提供更好的科学意识，作为潜在的职业选择，并提高他们对科学领域的一般知识。该项目还将构成研究生博士研究的基础，并将为实验室中的本科项目和本科夏季研究员提供材料并提供设施。调查人员将通过实验室访问和向公众的信息科学谈判，公开讲座的网络广播以及特殊活动来促进更广泛的受众（K-12和公众）的努力，以促进更广泛的受众（K-12和公众）。