2018 Ocean Mixing Gordon Research Conference

2018年海洋混合戈登研究会议

• 批准号: 1800017
• 负责人: Jonathan Nash
• 金额: $ 3万
• 依托单位: Gordon Research Conferences
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-03-01 至 2019-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1800017&HistoricalAwards=false
• 关键词: 2018; Ocean; Mixing; Gordon; Research

This award will help initiate a new Gordon Research conference on Ocean Mixing. Turbulent mixing results from complex and chaotic motions that span a large range of spatial and temporal scales. As such, it is particularly challenging to measure and model, with vast and important consequences. In the ocean, turbulent mixing controls transport of heat, freshwater, dissolved gasses, and pollutants. It is crucial for ocean biology because it both determines the flow field for the smallest plankton, and it sets large-scale gradients of nutrient availability. It is also central to understanding the energetics of the ocean and reducing the uncertainties in global circulation and climate models: recent work has shown that the spatial and temporal non-homogeneity in deep-ocean mixing may play a critical role in climate. This biennial Gordon Research Conference (GRC) on Ocean Mixing will provide a unique setting to discuss and improve our current understanding of turbulent mixing in the ocean, and with it a variety of implications for everything from climate change to global nutrient patterns that underlie our fisheries. The GRC format encourages the sort of interdisciplinary thinking and collaboration that is so vital to addressing these societal issues and will help our scientific community be the most vibrant & inclusive it can be. The ocean mixing community has historically suffered from poor diversity, which, while improved in recent years, still needs an influx of new people, a broadening of ties amongst domestic and international collaborators, and increased interdisciplinary interactions. The support from the National Science Foundation will explicitly be used to expand the demographic, professional and geographic diversity of participants by supporting attendance of underrepresented and under-resourced groups who stand to benefit from the intellectual environment and networking opportunities of the GRC format.The purpose and scope of this Gordon Research Conference is to provide an open forum for discussion of the rapidly evolving field of ocean mixing. Emphasis is threefold: observations of mixing in the world, new insights into dynamics that control mixing rates, and impacts of mixing on regional and global circulation and budgets. The latter two include development of parameterizations to turn dynamical insights into useful things to include in regional models and global numerical climate models. Understanding the physics that drives the distribution of deep-ocean mixing intensity is critical. Yet even after a half a century of efforts to understand its global distribution, observations are still sparse; a variety of direct and indirect methods are still needed to characterize the dynamical processes that lead to turbulence, and inferences of mixing from larger scale budgets. As such, the physics of ocean mixing is actively studied using a variety of observational techniques (direct measure of velocity and temperature fluctuations at the smallest scales, inferences from large-scale turbulent overturns, observations of net mixing by purposeful dye release) numerical and theoretical approaches, as well as laboratory experiments. Finally, the consequences of mixing for larger scale climate models (which do not directly resolve mixing) are addressed by turning dynamical insights of the previously mentioned work into practical parameterizations. As a concrete example, using different mixing schemes in numerical climate models changes predicted tropical ocean temperatures by more than a degree and predicted sea level rise by more than 30 cm. Mixing is one of the greatest sources of uncertainty plaguing today's models with impact of great societal relevance.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项将有助于启动新的戈登海洋混合研究会议。湍流混合是由复杂和混乱的运动跨越了各种空间和时间尺度的。因此，衡量和模型以及巨大而重要的后果尤其具有挑战性。在海洋中，湍流混合控制热，淡水，溶解的气体和污染物的运输。这对于海洋生物学至关重要，因为它都决定了最小的浮游生物的流场，并且设定了大规模的养分可用性梯度。这对于了解海洋的能量学并减少了全球循环和气候模型中的不确定性也是至关重要的：最近的工作表明，深度海洋混合中的空间和时间非同质性在气候中可能起关键作用。这次关于海洋混合的戈登研究会议（GRC）将提供一个独特的环境，以讨论和改善我们当前对海洋中动荡混合的理解，并具有各种含义，从气候变化到基于我们渔业的全球营养模式。 GRC格式鼓励了一种跨学科的思维和协作，对于解决这些社会问题至关重要，并将帮助我们的科学界成为最充满活力和最具包容性的社区。从历史上看，海洋混合社区的多样性差，尽管近年来有所改善，但仍需要大量的新人涌入，在国内和国际合作者之间扩大联系，并增加了跨学科的互动。 The support from the National Science Foundation will explicitly be used to expand the demographic, professional and geographic diversity of participants by supporting attendance of underrepresented and under-resourced groups who stand to benefit from the intellectual environment and networking opportunities of the GRC format.The purpose and scope of this Gordon Research Conference is to provide an open forum for discussion of the rapidly evolving field of ocean mixing.重点是三重：世界上混合的观察，对控制混合速率的动态的新见解以及混合对区域和全球循环和预算的影响。后两个包括开发参数化，以将动态见解转变为有用的东西，其中包括在区域模型和全局数值气候模型中。了解驱动深洋混合强度分布的物理学至关重要。然而，即使经过半个世纪的努力来了解其全球分布，观察仍然很少。仍然需要各种直接和间接方法来表征导致湍流的动力学过程，以及从大规模预算中推断出的混合。因此，使用各种观察技术（直接衡量最小尺度上的速度和温度波动的直接测量，从大规模湍流倾覆，通过有目的的染料释放观察到净混合的推断），对海洋混合的物理学进行了积极研究。最后，通过将前面提到的工作的动态见解转变为实际参数化来解决大规模气候模型的混合（无法直接解决混合）的后果。作为一个具体的例子，在数值气候模型中使用不同的混合方案的变化预测热带海洋温度的程度超过一定程度，并预测海平面上升超过30 cm。混合是困扰当今模型的最大不确定性来源之一，其影响很大。该奖项反映了NSF的法定使命，并被认为是值得通过基金会的知识分子优点和更广泛的影响评估审查标准通过评估来支持的。