Internal Waves in the Upper Ocean During MILE
Internal Waves in the Upper Ocean During MILE
复制标题
MILE 期间上层海洋的内波
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
Pearn P. Niler
中科院分区：
文献类型：
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作者：
M. Levine;R. D. Szoeke;Pearn P. Niler
摘要：我们描述了东北太平洋温度和速度测量的光谱分析，作为混合层实验（MILE）的一部分，并试图将观测到的波动与上层海洋的内波模型联系起来。从惯性频率到 1 cph，这些上层海洋数据与 WKB 尺度 Garrett-Munk 模型所描述的典型深海观测数据之间具有良好的一致性。与 Garrett-Munk 模型的最大偏差发生在高频（1-5 cph）的垂直位移场中，其中存在谱峰或肩部以及高垂直相干性。使用一些固定模式和不相关的噪声成功地对垂直位移的这些高频特征进行了建模，尽管速度谱的建模效果很差（可能是因为系泊运动的污染）。高频能量存在显着的时间波动，与当地风无关，但可能与平流有关……
Abstract We describe the spectral analysis of temperature and velocity measurements made in the northeast Pacific as part of the Mixed Layer Experiment (MILE) and attempt to relate the observed fluctuations to internal-wave models of the upper ocean. From the inertial frequency to 1 cph there is good agreement between these upper-ocean data and typical deep-ocean observations as described by the WKB-scaled Garrett-Munk model. The largest deviations from the Garrett-Munk model occur in the vertical-displacement field at high frequency, 1–5 cph, where there is a spectral peak or shoulder and high vertical coherence. These high-frequency features in vertical displacement are successfully modeled using a few standing modes and un-correlated noise, though the velocity spectra are poorly modeled—probably because of contamination by mooring motion. There are significant temporal fluctuations of the high-frequency energy that are not correlated with the local winds but are perhaps associated with the advection of...