摘要
对大连湾湾口断面处3个站的海流和温度盐度剖面进行了周日同步观测,在此基础上,计算并讨论了大连湾口断面处的潮流和混合的分布特征。结果表明,大连湾湾口的潮流类型为非正规半日潮流,M2分潮流为其优势分潮流;大连湾口陡坡处的平均混合率较强,约为10-3m2/s,混合率的最大值约为10-2m2/s,是大洋混合率背景场的1 000倍,主要发生在上层和底层。潮流与地形的相互作用为混合提供了能量来源。
The diurnal observations of current,temperature and salinity profile were carried out simultaneously at three stations in the slope around Dalian Bay Mouth.Based on this data set,the distribution of tidal current and mixing were studied and discussed.The results showed that the pattern of tidal current at the Mouth of Dalian Bay was irregularly semi-diurnal tidal current,and the dominant current of which is M2 current.The averaged mixing rate in the slope of Dalian Bay mouth is much bigger,with a value of about 10-3 m2/ s.The maximum value of the mixing rate is about 10-2 m2/s occurring in the upper and bottom layers,which is about 1000 times larger than the background values in the open ocean.The interaction between the tidal current and topography mainly provides the energy source for the enhanced mixing.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2010年第4期477-481,共5页
Marine Environmental Science
基金
国家海洋局908专项(908-02-02-03)
国家海洋局青年基金(2008217)
海洋公益性科研行业科研专项项目(200805069200805004)
关键词
大连湾
潮流
混合
耗散率
Dalian Bay
tidal current
mixing
dissipation rate
