由质量守恒定律，质量密度增量来自未挠动的质量密度的散度和位移矢量场。
According to the law of mass conservation the incremental mass density can be inferred from the divergency of the scalar unperturbed mass density and the vectorial displacement field.
结果表明，湿q矢量散度场的分布反映了次级环流的方向和强弱，暴雨出现在中尺度环流明显增强时。
The results show that the distribution of wet % Q % -vector indicates the direction and intensity of the secondary circulation. The heavy storm rain may occur when the mesoscale circulation enhanced.
结果表明，湿q矢量散度场的分布反映了次级环流的方向和强弱，暴雨出现在中尺度环流明显增强时。
The results show that the distribution of wet % Q % -vector indicates the direction and intensity of the secondary circulation. The heavy storm rain may occur when the mesoscale circulation enhanced.
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