Internal Wave Induced Sub-inertial Currents (IWISC)

风和潮汐通过海洋内部重力波场产生的能量流可能产生深远的影响，甚至影响到深海环流的性质，并随之对全球气候波动产生影响。 因此，理解这种能量流动的路径不仅仅是地球物理流体动力学中的深奥练习。 到目前为止，几乎没有证据表明，一个重要的途径，能源离开内波带在公海可能是通过直接产生的非共振，非传播，亚惯性motions.In这项研究中，研究人员在夏威夷大学将进一步探讨这样一个过程的观测证据惯性和半日内波的作用。 为简单起见，该过程被称为“内波诱导的亚惯性流”或IWISC。 他提出半日内潮（名义上频率为M2）和惯性振荡（频率为f）之间的非线性相互作用导致产生这些频率为M2减去f的亚惯性运动。 初步的分析建模和原始方程模型的数值模拟支持这一猜想，但需要更多的工作来定义其泛型的动力学。 最重要的是，对M2-f相互作用的观察可能预示着存在一整类相互作用，这些相互作用将能量从内波场中抽出来，并进入开阔海洋中的亚惯性运动。 为了探索历史数据集的IWISC现象分析，将使用原始方程数值模型和理论分析进行模拟。 这项工作的结果对估计可用于混合深海的内波能数量产生了重大影响。 除了这项工作的智力价值，这项研究将支持研究生，因为他在他的顾问的密切监督下进行了大部分拟议的工作。

The flow of energy from the winds and tides through the ocean's internal gravity wave field may have far-reaching consequences, impacting even the qualitative nature of the abyssal ocean's circulation, with attendant implications for global climate fluctuations. Consequently, understanding the pathways of this energy flow is more than just an esoteric exercise in geophysical fluid dynamics. Until now, there has been little evidence for the proposition that an important pathway for energy leaving the internal wave band in the open ocean might be by the direct generation of non-resonant, non-propogating, sub-inertial motions.In this study, a researcher at the University of Hawaii will further explore the observational evidence for such a process acting on inertial and semi-diurnal internal waves. For simplicity, the process is referred to as "Internal Wave Induced Sub-inertial Currents" or IWISC. He proposes that a non-linear interaction between the semi-diurnal internal tide (nominally at the M2 frequency) and the inertial oscillations (at frequency f) results in the generation of these sub-inertial motions which exist around the frequency of M2 minus f. Preliminary analytical modeling and numerical simulations with a primitive equation model support this conjecture, but more work is needed to define the dynamics of its generics. Most importantly, this observation of the M2-f interaction may presage the existence of a whole class of interactions that pump energy out of the internal wave field and into sub-inertial motions in the open ocean. To explore this IWISC phenomenon analysis of historical datasets, simulations with a primitive equation numerical model, and theoretical analysis will be used. The results from this work significantly impact the estimates of the mount of internal wave energy that is available for mixing the abyssal ocean. In addition to the intellectual merit of the work, this research will support a graduate student as he conducts much of the proposed work under the close supervision of his advisor.