一次突发性中尺度暴雪天气过程分析

对2004年12月丹东地区一次突发性中尺度暴雪天气过程的成因进行了分析。结果表明:造成此次暴雪天气过程的影响系统除天气尺度的冷锋外,其直接影响系统是中尺度海岸锋,它在有利的天气尺度环境下发展加强并向内陆移动,其上的中尺度环流形成的低云与冷锋云系的叠加是产生暴雪的主要原因。

A case study on an abrupt mesoscale heavy snow process in Dandong region

The causes of an abrupt mesoscale heavy snow process in Dandong region on Dec.6th,2004 were analyzed in this paper.The results showed that the occurrence of heavy snow had a close relationship with the mesoscale coastal front and the cold front at the synoptic scale.The mesoscale coastal front would be strengthened under advantageous synoptic scale systems and would move toward the inland.The main reason resulting in an abrupt mesoscale heavy snow was the superposition of the lower clouds arising from the mesoscale circulation over the mesoscale coastal front and the cold front clouds.