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Quantitative explanation of the opposite direction of internal wave propagation and sediment transport during the formation of internal wave and internal tide deposits
Author(s): LI Lin-jing
Pages: 44-
48
Year: 2012
Issue:
2
Journal: Sedimentary Geology and Tethyan Geology
Keyword: 内波、内潮汐沉积; 密度界面; 单向优势流动; 波谷; 波峰;
Abstract: 本文从海洋物理学角度出发,以内波波动理论为基础,通过建立两个不同密度的水层界面上的两层模型的波动方程对内波的传播特征进行定量解释.通过定量解释表达式可知:内波在两个不同密度的水层界面上传播时,两层内波流之水平速度方向相反,保持通过海底的整个截面的流通量为零.在密度界面之下,波谷处内波流的运动方向与内波前进方向相反,由于波谷相对于波峰更接近于海底,即波谷处截面积较小,故波谷下方的流速较波峰下方的流速大,容易形成与内波前进方向相反的单向优势流动,这种单向优势流动搬运沉积物的总趋势与内波的前进方向相反.
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