【作者】 刘丽丽； 吕江津； 姚学祥； 解以扬；

【Author】 Liu Lili1,2 Lv Jiangjin2 Yao Xuexiang2 Xie Yiyang2 (1 .Department of Atmospheric Sciences,NUIST,Nanjing,210044;2.Tianjin Municipal Meteorological Bureau,Tianjin,300374)

【机构】 南京信息工程大学； 天津市气象局；

【摘要】 用NCEP再分析资料、雷达资料以及地面自动站每小时资料对2005年6月28-29日发生在天津地区的局地暴雨天气进行诊断分析,研究结果表明:高空急流东移而来,造成西南风从高空传下至2.7km的高度,而高空急流的东移和地面暖空气的堆积抬升激发了低空急流;另一方面,高空急流激发出的重力波与西南方向移来的中γ尺度系统共同作用是产生这次局地暴雨天气的直接原因。更多还原

【Abstract】 A local convective torrential rain which happened in Tianjin urban on 28-29 June 2005 is analyzed by using reanalysis data of NCEP, radar data and the data of the automatic stations. The result of the research shows that the eastwards movement of the upper trough , the northwestward developing of the subtropical ridge and the persistent of the ridge in northeast of china offer the large scale conditions of the precipitation. The eastwards movement of the upper jet and the uplift of the warm air from the ground cause the appearance of the low jet. The influence of gravitational wave caused by the upper jet, that of the meso-γ convection system and the high warm and humidity conditions are the straight focuses of this local torrential rain.更多还原