Collaborative Research: Numerical simulations of Small-Scale Stirring: Internal Waves, Diapycnal Mixing, and Horizontal Fine Structure

合作研究：小规模搅拌的数值模拟：内波、二重混合和水平精细结构

• 批准号: 0623620
• 负责人: Marie-Pascale Lelong
• 金额: --
• 依托单位: NorthWest Research Associates, Incorporated
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-10-01 至 2010-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0623620&HistoricalAwards=false
• 关键词: Collaborative; Research; Numerical; simulations; Small

ABSTRACTOCE-0623620Intellectual Merit: Our understanding of lateral dispersion in the ocean on scales between 100's of meters and 10's of kilometers has received relatively little attention, despite the fact that lateral dispersion plays an important role in the spatial and temporal distribution of many properties in the ocean. Recent work by the scientists involved in this study has begun to elucidate the physics behind lateral dispersion, but we still lack a quantitative understanding of the relationship between the larger scale field, the internal wave field, and mixing across density surfaces. In this study, scientists from NWRI and U. Mass. Dartmouth, will conduct process-oriented numerical simulations to account for how energy is transferred between different scales of motion. Simulations will extende previous modeling studies of stirring by small-scale geostropic motions to include momentum fluxes associated with the breaking of internal waves, more realistic larger-scale forcing environments such as large-scale shearing and straining by tides or large-scale internal waves, and a number of other factors such as variations in the generation frequency, size and shape of mixed patches. An important goal of this study is the development of parameterizations so that larger-scale models of the ocean can accurately account for these processes without having to resolve them. Broader Impacts: Lateral dispersion governs a variety of problems including the rates at which nutrients are mixed, the dynamics and spreading of harmful algal blooms or other contaminants, and the recruitment of commercial fish stocks. Thus, this study will improve our ability to understand and predict a variety of scientific problems that affect the quality of our everyday life. In addition, through collaboration with colleagues at UCLA, the parameterizations to be developed in this study will be incorporated into a widely-used regional ocean model. Finally, the study includes several important educational activities including the mentoring of students in a research project and the enrichment of curriculum.

ABSTRACTOCE-0623620智力价值：尽管横向色散在海洋中许多特性的时空分布中发挥着重要作用，但我们对海洋中数百米到数十公里尺度的横向色散的理解相对较少受到关注。参与这项研究的科学家最近的工作已经开始阐明横向色散背后的物理原理，但我们仍然缺乏对更大尺度场、内波场和跨密度表面混合之间关系的定量理解。在这项研究中，来自 NWRI 和美国马萨诸塞州达特茅斯大学的科学家将进行面向过程的数值模拟，以解释能量如何在不同运动尺度之间转移。 模拟将扩展之前小尺度地转运动搅动的建模研究，包括与内波破裂相关的动量通量、更真实的大规模强迫环境，例如潮汐或大规模内波造成的大规模剪切和应变，以及许多其他因素，例如混合斑块的生成频率、大小和形状的变化。这项研究的一个重要目标是开发参数化，以便更大规模的海洋模型能够准确地解释这些过程，而无需解决它们。更广泛的影响：横向扩散控制着各种问题，包括营养物质混合的速度、有害藻华或其他污染物的动态和扩散，以及商业鱼类种群的补充。因此，这项研究将提高我们理解和预测影响我们日常生活质量的各种科学问题的能力。 此外，通过与加州大学洛杉矶分校的同事合作，本研究中开发的参数化将被纳入广泛使用的区域海洋模型中。最后，该研究包括几项重要的教育活动，包括在研究项目中指导学生和丰富课程。