摘要
利用地面、高空等常规观测资料,结合多普勒雷达、地面自动站等非常规观测资料,对2020年6月28日哈尔滨市主城区一次飑线造成的雷雨大风、超短时强降雨、局地小冰雹天气过程进行综合分析。结果表明:这次飑线过程发生在高空槽后与850-925 hPa高度自西南向东北伸展的暖温度脊叠置的大环流背景下,由地面温度锋区和中尺度辐合线触发的动力强迫产生飑线、冰雹等强对流天气。强降雨主要集中发生在15~20 min内,分钟降雨量较大值一般持续10~20 min,哈尔滨市不同行政区域降雨大值间隔在10~15 min左右,同时表现出气压陡增、温度骤降、风速变大的天气实况特征。在雷达拼图上表现出明显的飑线弓形回波特征。通过对本次天气过程的成因、雷达回波演变进行分析,并探讨本次飑线过程的预警着眼点及其可预警性,可以提高专业气象服务的能力和水平。
Based on the conventional observation data of ground and high altitude,combined with the unconventional observation data such as radar and automatic station,the thunderstorm gale,ultra short time heavy rainfall and local small hail caused by a squall line in the main urban area of Harbin on June 28,2020 are comprehensively analyzed.The results show that:the squall line process occurred under the triggering of northwest airflow,surface temperature front area and mesoscale convergence line behind the high trough.The strong convective weather,such as squall line and hail,occurred mainly in 15~20 minutes,and the larger value of minute rainfall generally lasted for 10~20 minutes.The interval between the maximum rainfall values of different administrative regions in Harbin was 10~15 minutes.At the same time,it shows the characteristics of abrupt increase of air pressure,sudden drop of temperature and increase of wind speed.The radar mosaic also shows obvious bow echo characteristics of squall line.Through the analysis of the causes of the weather process and the evolution of radar echo,the early warning focus and early warning ability of the squall line process are discussed,which can improve the ability and level of professional meteorological services.
作者
姜兵
于凯旋
高梦竹
曹蕾
欧娜音
董学贤
JIANG Bing;YU Kai-xuan;GAO Meng-zhu;CAO Lei;OU Na-yin;DONG Xue-xian(Harbin Meteorological Bureau,Heilongjiang Harbin 150028;Heilongjiang Meteorological Observatory,Heilongjiang Harbin 150030;Jixi Meteorological Bureau,Heilongjiang Jixi 158100)
出处
《黑龙江气象》
2024年第2期9-14,共6页
Heilongjiang Meteorology
基金
中国气象局创新发展专项(CXFZ2023J011)
黑龙江省龙云气象院士工作站(YSMS202005)。
关键词
飑线
专业服务
短时暴雨
强对流
Squall line
Professional service
Short-term rainstorm
Strong convection
