Collaborative Research: Interaction of Eddies with Mixed Layers

0612078这个气候模拟和过程小组的主要目标是在气专委级别的气候模式中制定和测试地面边界层内和附近的涡旋输送的参数化。结合资料和非常高分辨率的数值模式已被用来研究上层海洋的涡动动力学。利用这项工作，建立了非绝热表层中尺度涡旋输送的参数化方案和亚中尺度涡旋驱动的再层化参数化方案，并在社区气候模式中实现。它们对海洋平均状态有很大的影响，特别是在靠近海面的地方。这些修改可能会通过影响海-气交换，在耦合模式中暗示气候敏感性。将对耦合气候模型的一些影响进行调查。具体地说，此次续签将完成以下方面的工作：在NCAR、GFDL和MIT的海洋气候模式中完成了新的参数化的实施，并研究了它们在海洋-大气耦合模式中的影响。将模型产出与全球数据集估计的涡旋统计数据和未来三年将从海洋实地活动中获得的新数据进行比较。完成上层海洋中尺度-亚中尺度相互作用的过程研究，特别强调再层化、风强迫和锋生的作用。修改新的参数，以考虑到该团队最近才揭示的上层海洋物理的新方面。我们对地球气候系统的了解在很大程度上取决于我们对物理过程的理解，以及这些过程在数值模式中的整合。该项目将继续在上层海洋物理、改进气候模型中的物理以及理解气候对上层海洋过程的敏感性方面取得根本性进展。这项拟议的研究具有更广泛的影响。最明显的是，气候对人类状况有巨大的影响，该项目直接专注于改进气候模型中的海洋部分，这些模型模拟并试图预测气候和气候变化。两名青年科学家和三名博士后(属于该领域最有前途的人才)将接受气候研究和海洋建模领域的培训。该小组还积极参加了一些外联活动，并每年举行讲习班，以传播早期成果。在重要的科学会议上组织了关于涡旋-混合层相互作用的特别会议，并创建了一个网站(http://cpt-emilie.org/))来宣传正在进行的研究和研讨会活动。该项目是对美国CLIVAR(气候可变性和可预测性)计划的贡献。

0612078The main goal of on this Climate Modeling and Process team is to formulate and test in IPCC-class climate models parameterizations for the eddy transport in and near the surface boundary layer. A combination of data and very high resolution numerical models has been used to investigate eddy dynamics in the upper ocean. Using this body of work, a parameterization scheme for mesoscale eddy transport in the diabatic surface layer and a parameterization scheme for restratification driven by submesoscale eddies have been formulated and implemented in the community climate models. They show a large impact on the oceanic mean state, especially close to the surface. These modifications are likely to imply climate sensitivity in coupled models through the impact on air-sea exchange. Some of the implications for coupled climate models will be investigated. Specifically, this renewal will complete work in the following areas:. completing the implementation of the new parameterizations in the ocean climate models at NCAR, GFDL, and MIT and studying their impact in coupled ocean-atmosphere models, . comparing model outputs versus eddy statistics estimated from global data sets and from new data that will become available over the next three years from the oceanographic field campaigns,. completing the process studies of mesoscale-submesoscale interactions in the upper ocean with specialemphasis on the roles of restratification, wind forcing, and frontogenesis,. modifying the new parameterizations to account for new aspects of upper ocean physics only recently revealed by the team.Intellectual merit. Our knowledge of the Earth's climate system depends largely on our understandingof physical processes and integration of those processes in numerical models. The project will continuemaking fundamental progress in upper ocean physics, in improving physics in climate models, and inunderstanding the sensitivity of climate to upper ocean processes.Broader impacts. The proposed research has many broader implications. Most obviously, climate has an enormous impact on the human condition, and the project is directly focused on improving the ocean component of the climate models that simulate and attempt to predict climate and climate change. Two young scientists and three postdocs (among the most promising talents in the field) will be trained in the area of climate research and ocean modeling. The team has also been active in a number of outreach activities and meets for yearly workshops to disseminate early results. Special sessions on Eddy-Mixed Layer Interactions has been organized at major scientific meeting and a web-site (http://cpt-emilie.org/) was created to advertise the research under way and workshop activities.This project is a contribution to the U.S. CLIVAR (CLImate VARiability and predictability) program.