黄海、渤海盐度准三维数值预报模式

黄海、渤海盐度的垂直结构具有典型的自模性，而其水平分布又受平流、水平扩散效应及径流等因素的影响。本文根据黄海、渤海实测资料拟合了盐度垂直剖面的自模函数，并结合描述表、底层盐度及上均匀层厚度这３个特征量水平分布的方程，给出盐度三维结构的准三维模式。在模式中，综合考虑了海面风和热输入的强迫作用以及流场的平流、侧向混合及底层混合的影响因素，同时还考虑了径流、蒸发及降水的作用，较客观地反映了盐度的三维分布及其变化的物理过程。试报结果分析表明，模式的功能较好，结果令人满意。

A Quasi-Three-Dimensional Numerical Prediction Model of Salinity Structure in the Bohai and Huanghai Seas

The vertical salinity structure in the Huanshai and Bobal Seas have typical self-similar characters. However, the horizontal salinity distribution is influenced by advection, horizontal diffusion, river runoff, etc. By using the observed sea salinity data, a Similarity function of vertical salinity profiles of the Huanghai and Bobal Seas has been Constructed. On the basis of vertical integrated equations of motion and equation of continuity, and governing equations about the diStribution of 3 characteristic factors (surface salinity S., bottom salinity SH, and thickness of upper homogeneous layer h ), and combined with the similarity function, a quasi-three-dimensional numerical model of salinity structure has been developed. In the model, the comprehensive effects of sea surface wind stress and heat influx, advection, diffusion, entrainment, bottom as well as lateral eddy mixture are taken into consideration. It is shown that the numerical model is more practical and the results of the trial prediction are satisfactory.