The result shown that the cold (warm) advection and convergence (divergence) in the velocity data were interrelated with the formation, maintenance, and disappearance of the snow-fall.
结果表明：速度资料中的冷(暖)平流和辐合(散)与降雪的形成、维持和消散关系密切。
2
The vortex in Doppler velocity field, Echo tops, Vertical integrated liquid, lift stream and cold advection are significant in this rainfall case.
多普勒速度场、回波顶高、垂直液态含水量、对应的上升气流以及温度平流对这次降水具有预报指示意义。
3
The results show that the perturbation pressure forces induced by buoyancy, velocityadvection and dray are of the same order of magnitude as the corresponding resource terms and act against them.