摘要
概述了2006年6月16日影响大连机场的一次由强降水超级单体导致的“黑昼”天气的天气背景,应用卫星云图分析了雷暴云团的演变过程;利用大连市气象局新一代天气雷达资料,分析了强降水超级单体的雷达回波特征。结果表明:“黑昼”现象出现的主要原因是高空受东北冷涡控制,东北冷涡底部干冷空气与暖湿东南气流汇合,在大连地区上空形成了强降水超级单体。新一代天气雷达图像上强度图的演变与强降水超级单体模式相吻合;剖面图上显示出强降水超级单体的明显结构;存在着中气旋和中等到强的垂直风切变;分析了此次过程中出现冰雹的相关因子。
The weather background of a ＂Dark Day＂ caused by a heavy precipitation supercell storm on June 16, 2006 was summarized, and it had a great effect on the Dalian international airport. The evolution of thunderstorm cloud cluster was analyzed with satellite cloud picture. And the radar echo characteristics of the heavy precipitation supercell storm were analyzed based on the Doppler radar data in Dalian. The results showed that the main reasons of the ＂Dark Day＂ included the northeast cold vortex in high altitude, the dry and cold air in the bottom of northeast cold vortex, the warm and humid southeast air current. The evolution of reflectivity in the Doppler images was coincided with the mode of the classic heavy precipitation supercell storm. And there was an obvious structure of heavy precipitation supercell storm in the vertical sectional drawing. Furthermore, there were also a mid-cyclone and a vertical wind shear in the process. At last, the factors related to the hailstone were analyzed.
出处
《气象与环境学报》
2007年第2期15-20,共6页
Journal of Meteorology and Environment
