through comparison and analysis, it is suggested that: as the advection term is poor, the implicit scheme is proper;
通过比较分析后认为:在对流项较弱时,可采用隐格式计算;
the horizontal advection term contribute little to the frontogenesis and frontolysis.
水平温度梯度的平流对锋生(消)的影响都很小。
then, the particle-tracing method is designed, which calculates the advection term by setting some particles in the grid cells and tracing them.
然后,本文又设计了质点跟蹤法,该方法通过在网格内设置一些质点并对质点进行跟蹤来计算平流项。