Parameterization of Eddy Fluxes in the Ocean Surface Mixed Layer

摘要/机构：法拉利/麻省理工学院提案编号：OCE-0241528海洋表面混合层中主动和被动示踪剂的分布在海洋学和大气-海洋气候系统研究中具有重要意义。首先，上层海洋中的水团最终被俯冲到海洋内部，并强烈影响整个海洋环流。第二，混合层与大气强迫直接接触，控制着海洋和大气之间的性质交换。最近在北太平洋和南大洋的观测表明，斜压涡的示踪剂输送在上层海洋的物理中起着基本作用。然而，在粗分辨率模式的上层中，未分辨的涡旋运动的参数化是非常粗糙的，如果不是没有的话。这项提议的主要目的是提高我们对上层海洋涡旋输送物理的理解，并发展和检验适用于高分辨率模式的混合层涡旋输送的参数。这项研究将受益于气候建模倡议，并为其做出贡献，该倡议是麻省理工学院科学家之间的一项合作，旨在开发一种最先进的大气和海洋模型，用于研究地球气候。与参与麻省理工学院海洋模型开发的人的密切互动将有助于随着进展在模型界传播结果。为了让麻省理工学院的学生对这项研究感兴趣，首席研究员将在2003年春季在麻省理工学院开设的地球物理湍流研究生课程中介绍大尺度海洋-大气模式中涡旋参数化的基本概念。最后，麻省理工学院/世界卫生组织物理海洋学联合项目的一名学生将积极参与这项研究。

ABSTRACTPI/Institution: Ferrari / MIT Proposal No: OCE-0241528Distributions of active and passive tracers in the ocean surface mixed layer are of central importance in oceanography, and in studies of the atmosphere-ocean climate system. First, the water masses in the upper ocean are eventually subducted in the ocean interior and strongly affect the overall ocean circulation. Second, the mixed layer is in direct contact with the atmospheric forcing and controls the exchange of properties between the ocean and the atmosphere. Recent observations in the Northern Pacific and in the Southern Ocean suggest that tracer transport by baroclinic eddies play a fundamental role in the physics of the upper ocean. However, parameterizations of unresolved eddy motions in the upper layers of coarse resolution models are extremely crude, if not absent. The primary objectives of this proposal are to improve our understanding of the physics of eddy transport in the upper ocean, and to develop and test parameterizations for the mixed layer eddy transport appropriate for coarse resolution models. This research will benefit from and contribute to the Climate Modeling Initiative, a collaboration between scientists at MIT aimed at developing a state of the art model of the atmosphere and ocean for study of the climate of the Earth. The close interaction with people involved in the development of the MIT ocean model will help to disseminate the results in the modeling community as progress is made. In order to get students at MIT interested in this research, the principal investigator will present the basic concepts underlying eddy parameterization in large scale ocean-atmosphere models during a graduate course on geophysical turbulence, to be offered at MIT in the spring of 2003. Finally, a student of the MIT/WHOI Joint Program in Physical Oceanography, will actively participate in the research.