NUMERICAL SIMULATION STUDY OF THE OCCURRENCE AND DEVELOPMENT OF A MID-TROPOSPHERIC CYCLONE OVER THE SOUTH CHINA SEA

In this paper,the processes of the occurrence and development of a mid-tropospheric cyclone (MTC hereinafter) over the South China Sea are successfully simulated,adopting the convective heating profile calculated from the analysed data.And a series of numerical experiments show that the convective heating rate,especially its vertical profile,plays a key role in the occurrence,development and maintenance of the MTC.When there is highly concentrated convective heating in middle layer(400-450hPa),the MTC could occur and maintain for longer time.And the key to successfully predict the MTC by numerical model is to correctly specify the convective heating profile in the model.