根据中美海气ＴＯＧＡ调查第１～４航次（１９８６～１９８８年）的ＣＴＤ资料及部分ＡＤＣＤＣＰ资料，分析研究横跨赤道１４１°３０′Ｅ断面的内波及细结构特性，其中包括温度垂直梯度的概率分布及其谱特性，ＣＯＸ数的统计分布及Ｒｉｃｈａｒｄｓｏｎ数的垂直分布等，由此得出；该断面存在入侵性细结构、双跃层及阶梯结构；温度垂直梯度谱在波数０．１附近有一折点Ｋ１，按谱斜率不同将谱分为３段，当０．０３＜Ｋ＜Ｋ１时，β＜１；当Ｋ，＜Ｋ＜０．６时，β为－１．７～－３；当０．６＜Ｋ＜ｌ时，β为－３．５～－５。 According to the CTD data and some ADCDCP data of TIA-4 TOCA (1986 ~ 1988) of the Sino-US Tideway Survey, the internal wave and fine structure characteristics of 141 ° 30’E section across the equator were analyzed and studied, including the probability of temperature vertical gradient Distribution and spectral characteristics, the statistical distribution of COX numbers and the vertical distribution of Richardson number, etc. It is concluded that there are intrusive fine structures, double jumps and staircase structures in the section. The temperature vertical gradient spectrum has a The breakpoint K1 divides the spectrum into three sections according to different spectral slopes, β <1 when 0.03