U.S.-France Cooperative Research: Air-Sea Interaction Experiment: CLUSE-HEXIST 3 (Physical Oeanography)

该奖项将支持康涅狄格大学海洋科学研究所的Edward Monahan博士领导的美国物理海洋学家小组与法国马赛湍流统计研究所的P.G. Mestayer博士领导的法国同事之间的持续合作研究。这项名为“CLUSE HEXIST 3”的研究项目是国际合作项目HEXOS（海上湿度交换）的一个成果，该项目旨在了解大风和风暴事件期间从海洋到大气的湿度转移过程，特别强调海洋喷雾的作用。HEXOS程序的一个主要工作是围绕构建下边界层内耦合传输过程的实际数值模型。这些模型被认为是评价海浪对转移过程的影响所必需的，也是解释测量结果的指南。在HEXOS项目的背景下，已经建立了一个面向实验室的子项目HEXIST。HEXIST是模拟隧道中HEXOS实验的缩写，旨在利用马赛湍流统计研究所大型海气相互作用模拟隧道的独特功能。热、水蒸气和喷雾液滴的传递过程将通过风速、水、空气和露点温度的隧道控制和人工曝气装置（喷雾起泡器）独立控制。因此，隧道测量将为最终可以扩展到公海的模型提供一个测试平台。在这个项目中，美国和法国的研究人员将有机会设计一种新的方法来使用马赛设施进行喷雾液滴行为的实验室研究。美国的传感技术和分析能力将为联合项目做出贡献。与HEXOS计划的其他协调要素一起，这一系列实验是迄今为止对海洋表面水交换这一复杂问题最全面的攻击。研究结果对推进水交换过程的参数化具有重要意义。气溶胶液滴模拟的改进将使这些实验的结果与海洋过程的模拟更直接相关。

This award will support continued collaborative research between a group of U.S. physical oceanographers led by Dr. Edward Monahan, Marine Sciences Institute, University of Connecticut and French colleagues led by Dr. P.G. Mestayer, Institut de Mecanique Statistique de la Turbulence, Marseille, France. The research project, entitled "CLUSE HEXIST 3" is an outgrowth of the international cooperative program HEXOS (Humidity Exchange over the Sea), which aims to understand the humidity transfer processes from sea to atmosphere during gale and storm wind events, with a special emphasis on the role of marine sprays. One major effort in the HEXOS program is centered around the construction of realistic numerical models of the coupled transfer processes within the lower boundary layer. Such models are viewed as essential in the evaluation of the impact of sea spray on the transfer process and as a guide in interpreting measurements. Within the context of the HEXOS program, a laboratory oriented subprogram, HEXIST, has been established. HEXIST, which stands for the HEXOS Experiments in the Simulation Tunnel, is intended to take advantage of the unique capabilities of the Large Air-Sea Interaction Simulation Tunnel of the Institut de Mecanique Statistique de la Turbulence in Marseille. The transfer processes of heat, water vapour and spray-droplets will be controlled independently by means of the tunnel controls of wind speed, water, air and dew-point temperatures and by artificial aeration devices (spray bubblers). Thus, the tunnel measurements will provide a test bed for models that can eventually be extended to the open ocean. In this project, U.S. and French researchers will have the opportunity to design a new approach to laboratory studies of spray droplet behavior using the Marseille facility. U.S. sensing technology and analysis capabilities will contribute to the joint project. Together with other coordinated elements of the HEXOS program, this series of experiments is the most comprehensive attack to date on the complex question of water exchange at the sea surface. The results of this research will have a major impact on advancing parameterization of the water exchange process. Improvements in the simulation of aerosol droplets will make the results of these experiments more directly relevant to the modelling of oceanic processes.