Modeling Material Transport and Mixing in the Mid-latitude Ocean Circulation

Berloff0091836将使用一系列模型来研究海洋中的传输和混合。最初，一个准地转模式将被用来产生“真实”的速度场。由此产生的湍流速度将被用来在整个区域内传输拉格朗日粒子。结果将与使用马尔可夫模型序列(阶数为0、1、2和3)模拟的离散度进行比较。这些允许扩散、弹道、亚扩散和超扩散行为。这些研究也将被用来理解模型的现象学行为。随机模型的结果将与海洋不同区域的观测浮标特征进行比较。我们还将研究更现实、更原始的方程模型。将研究流动结构中的低频变化、风强迫变化、涡流、三维流和源的影响。另外两个令人感兴趣的问题是粗糙地形的影响和马尔可夫模型中的非高斯力的影响。在欧拉偏微分方程组中加入随机项，以模拟马尔可夫模型的作用，预计将在项目接近尾声时进行。

Berloff0091836Transport and mixing in the ocean will be studied using a sequence of models. Initially, a quasi-geostrophic model will be used to produce 'true' velocity fields. The resultant turbulent velocities will be used to transport Lagrangian particles throughout the domain. The results will be compared to modeled dispersion using a sequence of Markov models (orders 0, 1, 2, and 3). These allow for diffusive, ballistic, sub and super diffusive behavior. These studies will also be used to understand the phenomenological behavior of the models. Results of the stochastic models will be compared with observed float characteristics from different regions of the ocean. More realistic, primitive equation models will also be investigated. Effects of low-frequency variability in flow structure, wind-forcing variability, eddy-induced flows, three-dimensional flows, and sources will be investigated. Two other questions of interest are the impact of rough topography and the impact of non-Gaussian forcing in the Markovian models. Incorporation of stochastic terms in the Eulerian partial differential equations, to simulate the role of the Markov models, is contemplated towards the end of the project.