底地形变化对内潮产生影响的数值研究

Numerical study about influence of bottom topographic change on generation of internal tide

本文结合南沙群岛海域出现内潮的水文背景 ,建立了一个两层数值模式 ,并通过数值试验来探讨由正压潮波作用下的内潮产生机制。结果表明 :底形效应是促使内潮产生的重要因子 ;内潮主要在大陆坡产生 ,然后分别沿着大陆架和深海平原两个方向传播 ;内潮斜压流速的量级可与正压流速的相比拟。

In the paper, based on the hydrologic background of the existence of internal tide inthe Nansha Islands sea area, a two layer model is set up, and some numerical experiments are done to study the generation mechanism of internal tide forced by a barotropic tide wave; The results show that bottom topographic effect is an important factor for generation of internal tide; internal tide propagates in the direction of continental shelf and abyssal plain after forming in the continnental slope; the order of baroclinic tide speed can be compared with that of barotropic one.