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本文对1979年1月和4月发生于西北太平洋地区的两个爆发性气旋和一个非爆发性气旋，应用位势涡度和E－P通量等进行了诊断分析。分析揭示，爆发性气旋发生与发展，不同于普通气旋的动力机制，它是由于平流层底的涡度异常增大南侵和下族对对流层扰动、上层冷空气下传形成的上下偶合垂直结构的发展性气旋。其动力主要来自上层强迫和下层的水汽输送产生的大量而集中的凝结潜热。
In this paper, two explosive cyclones and one non-explosive cyclone occurred in January and April 1979 in the Pacific Northwest were analyzed by using potential vorticity and E-P flux. The analysis reveals that the occurrence and development of explosive cyclones are different from those of ordinary cyclones in that the vorticity at the bottom of the stratosphere is abnormally increased, and the southward intrusion and subordinate to the troposphere are disturbed. The upper and lower coupled vertical structures Developmental cyclone. The motive force comes mainly from the large and concentrated latent heat of condensation generated by upper forced and lower vapor transport.