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首页> 外文期刊>Journal of Physical Oceanography >Observations of Small-Scale Processes Associated with the Internal Tide Encountering an Island
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Observations of Small-Scale Processes Associated with the Internal Tide Encountering an Island

机译：与遇到岛屿的内潮有关的小规模过程的观测

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Current-meter, temperature, and microstructure observations of the large-amplitude internal tide shoaling on the continental shelf of the east coast of northern New Zealand show the complexity of the internal kinematics and mixing. The propagation speed of the main internal wave was around 0.3 m s~(-1), and nonstationary time series analysis was used to locate the trailing short-wavelength internal waves in frequency (periods of around 40 min) and tidal-phase space. The average energy dissipation rate (5 x 10~(-8) m~2 s~(-3)) was an order of magnitude smaller than that observed on the open shelf in other studies, but peaks in dissipation rate were measured to be much greater. The vertical diffusivity of heat was around 10~(-4) m~2 s~(-1) comparable to, or greater than, other studies. Examples of the scale and sporadic nature of larger mixing events were observed. The behavior was complicated by the nearby steeply shoaling coast of the Poor Knight Islands. Consistent reflected wave energy was not apparent.
机译：在新西兰北部东海岸大陆架上的大幅度内部潮汐浅滩的电流表，温度和微观结构观测表明，内部运动学和混合过程很复杂。主内波的传播速度约为0.3 m s〜（-1），并采用非平稳时间序列分析来定位尾随短波内波的频率（周期为40分钟左右）和潮汐空间。平均能量耗散率（5 x 10〜（-8）m〜2 s〜（-3））比其他研究中在开放式架子上观察到的要小一个数量级，但是测得的耗散率峰值为更大。热的垂直扩散率约为10〜（-4）m〜2 s〜（-1），与其他研究相当或更高。观察到较大混合事件的规模和偶发性的例子。附近的贫困骑士群岛陡峭的浅滩使这种行为变得复杂。一致的反射波能量并不明显。

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