The Role of Secondary Circulation in the Initiation and Evolution of Severe Convective Weather

The diagnostic research of secondary circulation forced by the background field is made by means of the intensive observation of the severe convective weather process occurred on 28th April, 1983. The data are acquired by the Meso-Scale Weather Experiment of Eastern China. The diagnostic results show that the secondary circulation can trigger off the severe convective weather in the zone of accumulation of geopotential instability energy