用CTD资料分析东海温、盐、密度垂向结构的初步尝试——Ⅱ.温度细结构特性初探   总被引：1，自引：3，他引：1       下载免费PDF全文

方欣华  尤钰柱  张玉琳 《海洋学报》1988,10(2):129-135

本文利用现有的CTD资料估算了东海大陆架和大陆坡一个断面上的温度梯度垂向波数谱;揭示了一个断面上不同深度的测站和不同层次的谱特性,并与深水大洋中的主温跃层作了比较;文中还推测了细结构的某些可能的产生机制.  相似文献   

用CTD资料分析东海温、盐、密度垂向细结构初步尝试——Ⅰ.浅海内波的垂向结构     

方欣华  尤钰柱 《海洋学报》1987,9(5):537-543

用时间间隔为1小时的12次CTD观测短记录分析了东海浅水区温、盐、密度脉动的垂向特性.平均温、盐、密度剖面可以分成明显的3层:跃层及其上、下层.温、盐、密脉动基本上由内波引起,但在跃层上、下界也存在一定的入侵卷挟.跃层中心的深度起伏大于6.35米,厚度变化在3.5-8米之间.它们随时间的变化是间歇性的,不规则的.用最大熵谱估计方法估计得温度脉动的垂向波数谱,表明能量主要集中在低波数段(<0.13周/米),其间有两突出的谱峰,估计谱线斜率低于-3次方.在中(0.13-0.64周/米)、高(>0.64周/米)波数段谱线分别有-3与-5次方波数依从关系.可能低波数段是内波运动;中波数段是细结构过程或内波与细结构的联合作用;而高波数段的细结构则很弱.  相似文献   

THE VERTICAL CHARACTERISTICS OF INTERNAL WAVES IN SHALLOW REGION OF THE EAST CHINA SEA ANALYSED FROM CTD DATA     

方欣华  尤钰柱 《海洋学报(英文版)》1987,6(4):493-502

The vertical characters of temperature, salinity and density fluctuations in shallow region of the East China Sea are analysed by using 12 CTD short records with 1-hour intervals. The average S,t and p profiles can be divided into three distinctive layers: the thermocline, and the layers above and below it. The fluctuations of t, S and p are basically caused by internal waves, but there are somewhat intrusions or entrainments at the thermocline boundaries. The vertical displacement of the thermocline centre is up to more than 6.35m and the thermocline thickness changes from 3.5 to 8.0 m. Their varature with time are intermittent and rather irregular. The vertical wavenumber spectra of temperature fluctuations have been estimated by using the maximum entropy method, indicating that energy is mainly contained in the low-wavenumber range (<0.13cpm) with two sharp peaks probably corresponding to the first and second modes of internal waves, whose dependence is estimated to be less than β-2. There exist dep  相似文献