首页 | 本学科首页   官方微博 | 高级检索  
     检索      

南海北部陆架区内孤立波向岸传播过程研究
引用本文:钱洪宝,黄晓冬,田纪伟,赵玮.南海北部陆架区内孤立波向岸传播过程研究[J].海洋学报(英文版),2015,34(9):35-42.
作者姓名:钱洪宝  黄晓冬  田纪伟  赵玮
作者单位:中国海洋大学物理海洋教育部重点实验室;中国21世纪议程管理中心,中国海洋大学物理海洋教育部重点实验室,中国海洋大学物理海洋教育部重点实验室,中国海洋大学物理海洋教育部重点实验室
摘    要:南海北部是全球海洋中内孤立波最强和最为活跃的海域。然而,内孤立波在传入陆架区后,其形态发生显著变化,其传播演变过程表现出高度的复杂性。本研究综合卫星图像和数值模式手段研究了内孤立波在向岸传播过程中的空间变化特征。可见光卫星图像研究结果显示,南海北部陆架区存在三种形态的内孤立波,分别为第一模态下凹型内孤立波、第一模态上凸型内孤立波和第二模态内孤立波。受水深和层结变化的控制,它们的分布区域显著不同。基于MITgcm的数值模拟研究表明,上凸型内孤立波由第一模态下凹内孤立波经过极性转换过程发展而来,而第二模态内孤立波由第一模态下凹内孤立波与急剧变浅地形相互作用而产生。

关 键 词:内孤立波  非线性内波  南海  垂向模态
收稿时间:2014/11/23 0:00:00
修稿时间:2015/2/12 0:00:00

Shoaling of the internal solitary waves over the continental shelf of the northern South China Sea
QIAN Hongbao,HUANG Xiaodong,TIAN Jiwei and ZHAO Wei.Shoaling of the internal solitary waves over the continental shelf of the northern South China Sea[J].Acta Oceanologica Sinica,2015,34(9):35-42.
Authors:QIAN Hongbao  HUANG Xiaodong  TIAN Jiwei and ZHAO Wei
Institution:1.Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China;The Administrative Centre for China's Agenda 21, Beijing 100089, China2.Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China
Abstract:The activities of internal solitary waves (ISWs) over the continental shelf of the northern South China Sea (SCS) are of high complexity. In this study, we investigated the spatial-temporal characteristics of the shoaling ISWs over the northern SCS continental shelf using the satellite images and the results of numerical simulation. The examination of the ISW signals in the satellite optical images revealed the existence of three types of ISWs in the region north to the Dongsha Island, namely, mode-1 depression ISW, mode-1 elevation ISW, and mode-2 convex ISW. The geographical distributions of these ISWs were derived from the satellite images. Numerical results exhibited the process of polarity conversion of ISWs, by which mode-1 elevation waves were transformed from the shoaling mode-1 depression waves. The mode-2 convex ISWs generally followed the mode-1 depression ISWs. The numerical results suggested that the interaction of the mode-1 depression ISWs with the up-slope topography locally generated mode-2 ISWs, and such waves of high vertical mode dissipated rapidly during the inshore propagation.
Keywords:internal solitary wave  nonlinear internal wave  South China Sea  vertical mode
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《海洋学报(英文版)》浏览原始摘要信息
点击此处可从《海洋学报(英文版)》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号