摘要
本文对北部湾内一个连续7d的海流观测站的资料进行旋转谱分析。结果表明,该海区潮流属于不正规全日潮,全日周期分量的谱能量与半日周期分量的谱能量的比值为1.7。全日周期分量的椭圆主轴方向为341°,且椭圆主轴方向较稳定。整个流场基本上受顺时针旋转流所控制。总的趋势,在低频段海流的北分量自谱能量远比东分量自谱大。东分量谱相对北分量有一个较短的时间滞后,且北分量与东分量相关性较好。分析结果与以往对测站所在海区观测的潮流准调和分析结果相吻合。
Rotary spectral analysis of the current is carried out by using a station at the east coast of Beibu Gulf, and a time series of seven days. The results of the analysis are identical to the results obtained by other authors.The results of the spectral analysis show that the sea area is an irregular diurnal tidal sea area. The ratio of spectral energy of the diurnal tide to that of semi-diurnal tide is 1.7. The direction of the main axis of the corresponding period component diurnal ellipse is stable and 341°. The entire flow field is basically controlled by a clockwise rotary current. The spectral energy of the northern component of the tidal current is much larger than that of the eastern component . At the low frequency section, the spectra of the eastern component is slightly behind that of the northern compontent.
出处
《热带海洋》
CSCD
1991年第4期74-78,共5页
关键词
海流
旋转谱
北部湾
rotary spectrum, clockwise spectrum, quadrature spectrum, ellipse stability
