高空气旋
low-level cyclone circulation with high-level anti cyclone circulation, is helpful to form low-level convergence and high-level divergence, and make the rising airflow nearby cyclone keep and strengthen so that have offered necessity condition for convection precipitation.
低层的气旋性环流和高层的反气旋性环流相配合,有利于形成低层辐合,高层辐散,使得气旋附近的上升气流得以维持和加强,从而为对流性降水提供了必要条件。
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