Dynamics of Equatorial, Coastal and Subtropical Ocean Circulations

这项研究包括一系列数值模拟研究，旨在研究三个区域的上层海洋环流的基本动力学：赤道、沿海和亚热带海洋。研究中使用的主要模式是一个非线性的2 1/2层动力/热力学海洋模式，它允许两个活跃层之间的水交换。研究任务要么是目前由国家科学基金会资助的工作的延续，要么是自然延伸(8817026和8912015)。大多数研究都有两个统一的主题：(1)理解一种新型锋面不稳定的动力学，(2)探索卷吸和剥离物理的参数化解的敏感性。%本研究包含直接适用于所有海洋的研究组成部分，以及更适用于特定海洋的研究组成部分。直接适用于所有海洋的研究内容包括：(1)研究与赤道流、沿岸流和小尺度海洋锋有关的变异性；(2)研究赤道、沿海和副热带海洋环流之间的相互作用。更适用于具体海洋的研究内容包括：(1)印度洋，特别是孟加拉湾、印度沿岸和赤道附近各种水流模式的驱动机制研究；(2)太平洋新几内亚沿岸暗流研究。

This research entails a hierarchy of numerical modeling studies designed to investigate fundamental dynamics of the upper ocean circulation in 3 regimes: the equatorial, coastal and subtropical oceans. The primary model to be used in this research is a nonlinear, 2 1/2-layer dynamic/thermodynamic ocean model which allows exchange of water between the 2 active layers. The study tasks are either continuations, or natural extensions, of work currently being funded by NSF (8817026 and 8912015). There are two unifying themes for much of the research: (1) understanding the dynamics of a new type of frontal instability, and (2) exploring the sensitivity of solutions to the parameterization of entrainment and detrainment physics. %%% The study contains research components that are directly applicable to all oceans, and research components that are more applicable to specific oceans. The research components directly applicable to all oceans are: (1) the investigation of the variability associated with equatorial currents, coastal currents and small-scale oceanic fronts, and (2) the study of interactions between the equatorial, coastal and subtropical ocean circulations. The research components more applicable to specific oceans are: (1) the study of the driving mechanisms of various flow patterns in the Indian Ocean, particularly in the Bay of Bengal, along the coasts of India, and near the equator, (2) the study of the New Guinea Coastal Undercurrent in the Pacific Ocean.