摘要
本文根据1964年和1980～1985年间收集的水温和海流连续观测资料,利用功率谱分析方法对东海陆架海域水温的周期变化进行了研究。结果表明,水温变化的能量分布在各频段上不尽相同,而且也很不均匀。一般讲来,能最随频率的增高而递减,反映了水温谱的能量具有由高频段向低频段运移的趋势;东海陆架海域水温的变化周期多为12h(半日)。这主要是由海流引起的,因为研究海域的海流具有明显的半日周期变化;在跃层和不同水体的交界处水温变化较为复杂,且具有多种变化周期。
Based on temperature and current data obtained in 1964 and, from 1980 through 1985, the periodic variations of sea-water temperature in the continental shelf area of the East China Sea were studied using power spectrum method. The results showed that energy distributions of temperature variation were not only different from one another but also very heterogeneous at each frequency on the temperature spectrum the energy would transfer from high-frequency section to low-frequency section. The varia-tional period of temperature was 12 hours or. semidiurnal, principally caused, by current which varied obviously in a semidiurnal period. At thermoc-line and boundaries of watermasses, water-temperature variations were complex, marked by multi-variation periods.
出处
《海洋通报》
CAS
CSCD
北大核心
1992年第5期15-21,共7页
Marine Science Bulletin
关键词
东海
水文
陆架
周期变化
海水
the East China Sea
continental shelf
seawater temperature
variation period
power spectrum analysis
