CAJ | 학술논문

利用NCEP 1 1再分析资料、常规天气图、全国自动加密观测资料和石家庄多普勒天气雷达等资料,对发生在河北省中南部的一次短时暴雨天气过程进行了分析。结果表明：风速和风向在河北中南部的辐合促进了水汽的辐合。块状回波与带状回波交接处出现最大暴雨中心,逆风区和弱辐合区与较强降水相吻合。邢台次云区的形成与发展和北部主云区的发展密切相关,随着邢台北部低于-42云区范围扩大,邢台狭窄的强对流回波带形成。地面加密风场的变化以及中尺度辐合线的形成均对短时暴雨的发生有较好的指示作用,带状回波在地面辐合线附近快速强烈发展,而且随着河北中南部地面辐合线的消失而原地减弱。
이용NCEP 1 1재분석자료、상규천기도、전국자동가밀관측자료화석가장다보륵천기뢰체등자료,대발생재하북성중남부적일차단시폭우천기과정진행료분석。결과표명：풍속화풍향재하북중남부적복합촉진료수기적복합。괴상회파여대상회파교접처출현최대폭우중심,역풍구화약복합구여교강강수상문합。형태차운구적형성여발전화북부주운구적발전밀절상관,수착형태북부저우-42운구범위확대,형태협착적강대류회파대형성。지면가밀풍장적변화이급중척도복합선적형성균대단시폭우적발생유교호적지시작용,대상회파재지면복합선부근쾌속강렬발전,이차수착하북중남부지면복합선적소실이원지감약。
Based on the NCEP reanalysis data（1°×1°）,the conventional weather maps,the meteorological data from intensive automatic stations and Doppler weather radar data in Shijiazhuang,a short time heavy rain process in the middle and south of Hebei province was analyzed.The results show that convergence of wind speed and wind direction in the middle and south of Hebei province promotes the convergence of water vapor.The maximum centre of heavy rain is near the place of connection of bulk echo and banding echo,and the position of strong precipitation coincides with the adverse wind area and weak convergence area.The formation and development of cloud area at Xingtai is related to the development of main cloud area in the north of Hebei province.With the extension of cloud area where temperature drops below-42 ℃,the strong and narrow banding echo is formed at Xingtai.The variations of surface intensive wind fields and the formation of mesoscale convergence line are indicative for occurrence of a short time heavy rain.Banding echo develops rapidly near convergence line on the ground,and it weakens with the disappearance of the convergence line on the ground in the middle and south of Hebei province.