【作者】 王彦； 李胜山； 郭立； 冯金湖； 王庆元；

【Author】 Wang Yan1,2 Li Shengshan1 Guo Li1 Feng Jinhu3 Dong Gaohong1 Wang Qingyuan1 ( 1 TianJin Meteorological Observatory,Tianjin 2 Chinese Academy of Meteorology Sciences ,Beijing 3 Binhai Meteorological Office ,Tianjin)

【机构】 天津市气象台； 天津滨海新区预警中心；

【摘要】 应用天津新一代天气雷达和相应的自动气象站资料,统计分析雷达监测到的4次渤海湾海风锋的特点,并研究渤海湾海风锋与强对流天气形成、发展和消散过程演变特征。结果表明:渤海湾海风锋在低仰角(0.5o或1.5o)基本反射率产品中表现为平行于渤海湾的窄带弱回波,强度一般仅维持在15-25dBz,长度约为100-300千米,宽度随着季节、天气背景场的变化而变化;并且移动速度非常缓慢,基本维持在10-15km/h。低仰角(0.5o或1.5o)的基本速度产品上,海风锋几乎呈准静止的零速度窄带回波。当海风锋与弱冷锋碰撞时,碰撞交叉处能够产生强对流天气;而单一海风锋不能产生强对流天气,仅能改变气温和风向等气象要素特征。更多还原

【Abstract】 With Tianjin doppler radar and auto-weather station data,a total of 4 times sea-breeze front features and evolutions are analysed in Bohai bay.It is showen that sea breeze fronts of Bohai bay belong to narrow and weak echo and run parallel to Bohai bay. Reflectivity’s intensity only remain 15-25dBz,its length about 100-300 kilometer,and its width changes with backgrounds of weather and seasons .And its speed is very slow,just 10-15km/h. It is proved that collision between sea-breeze front and coldfront can bring about severe weather . Only sea-breeze front cannot cause shower ,but it can change temperature ,humidity ,and wind direction .更多还原