深海内波空间啁啾的演变研究  

The Study About Evolution of Spatial Chirp for Deep-Sea Internal Waves

作　　者：孙美玲[1] 王晶[1] 郭凯[1] 张旭东[1] 孟俊敏 

机构地区：[1]中国海洋大学,山东青岛266100 [2]中国海洋局国家第一海洋研究所,山东青岛266061

出　　处：《中国海洋大学学报（自然科学版）》2015年第1期114-120,共7页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(61171161)资助

摘　　要：根据基于两层流体推导的深海内波弱非线性薛定谔(Nonlinear Schrodinger,简称NLS)方程,引进空间啁啾的思想,研究深海区频散效应和非线性效应的作用。文中推导出了频散效应和非线性效应所致啁啾的表达式,采用数值计算方法计算了综合效应产生的总啁啾。分析了频散和非线性以及综合效应所致啁啾在深海内波传播中的演变规律。从空间啁啾的角度,解释中国南海东沙群岛附近深海区内波演变的机理。In the paper,according to the deep-sea internal waves weakly nonlinear Schrodinger （NLS） equation which is derived based on two-layer fluid basic equations,the effects of dispersion and nonlinearity in deep sea are tried to explain with the idea of spatial chirp.The functions of dispersion-caused chirp and nonlinearity-caused chirp are resolved,and the total chirp are calculated mathematically.Then evolutions of dispersion-caused chirp,nonlinearity-caused chirp and total chirp are analyzed.The mechanism of the evolution of internal waves around the Dongsha islands in the south China sea is explained in terms of spatial chirp.

关 键 词：空间啁啾 内波 非线性薛定谔方程 深海 

分 类 号：P731[天文地球—海洋科学]