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首页> 外文期刊>Estuarine Coastal and Shelf Science >Investigation of the generation and propagation of low frequency internal waves: A case study for the east coast of India
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Investigation of the generation and propagation of low frequency internal waves: A case study for the east coast of India

机译：低频内波的产生和传播研究：以印度东海岸为例

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摘要

SAR (Synthetic Aperture Radar) images in the northwest Bay of Bengal indicate the existence of internal waves and their occurrence and intensity is topography dependent as indicated by in-situ data and satellite information. To complement and comprehend the observations, a three-dimensional Princeton Ocean Model is applied to study the generation and propagation of internal waves. The model domain is configured with a variable curvilinear grid and the input fields comprise bathymetry, initial temperature and salinity, wind stress, air-sea heat flux and tidal information. The numerical investigation indicated a predominant activity of internal waves in the north, and the rationale is three-fold. The first one could be the stable stratification due to fresh water discharge from head-bay major river system, secondly, the significant magnitude/range of the tides and finally, the bathymetry in the coastal waters off Paradip is about 12% shallower compared to that of Visakhapatnam and further south. The cumulative effect of these causes the predominance of internal waves in the north. The core of the energy is essentially in the low-frequency range and the model is able to simulate semi-diurnal and diurnal components reasonably well up to 6 h frequency (0.162 cph).
机译：孟加拉西北湾的SAR（合成孔径雷达）图像表明存在内部波，其发生和强度取决于地形，如原位数据和卫星信息所示。为了补充和理解这些观测结果，我们使用了三维普林斯顿海洋模型来研究内部波的产生和传播。模型域配置有可变的曲线网格，输入字段包括测深，初始温度和盐度，风应力，海海热通量和潮汐信息。数值研究表明，北部的内波活动最为活跃，其原理是三倍的。第一个可能是由于从头湾主要河流系统排放淡水而导致的稳定分层，其次，潮汐的幅度/范围很大，最后，与帕拉迪普相比，沿海水域的测深浅约12％。 Visakhapatnam和更南的地方。这些的累积效应导致北部的内波占主导地位。能量的核心本质上是在低频范围内，并且该模型能够合理模拟高达6 h频率（0.162 cph）的半日和日分量。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2010年第1期|P.143-152|共10页
  • 作者

    A.D. Rao; S.V. Babu; K.V.S.R. Prasad; T.V. Ramana Murty; Y. Sadhuram; D.K. Mahapatra;

  • 作者单位

    Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi 110016, India;

    Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi 110016, India;

    Department of Meteorology and Oceanography, Andhra University, Visakhapatnam, India;

    Regional Centre, National Institute of Oceanography, Visakhapatnam, India;

    Regional Centre, National Institute of Oceanography, Visakhapatnam, India;

    Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi 110016, India;

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  • 正文语种 eng
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  • 关键词

    internal waves; stratification; bathymetry; tides; river discharge;

    机译：内部波浪分层;测深仪潮汐河水排放;

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