摘要
利用地面自动站常规资料、再分析资料和S波段双偏振雷达资料,对发生在赣北九江地区2022年4月24日到25日的一次锋前降水的生成、发展过程进行分析。结果表明:1)锋面过境前,当整层都处在上下一致的西南风时,庐山东侧鄱阳湖河谷地带会形成东北-西南向的地形通道,易触发局地对流,形成下游比上游先产生降水的现象。2)此次过程锋前暖区中,庐山东侧的地形通道有通过促进湍流增强加快雨滴凝结增长的方式增强降水的作用。3)幕阜山脉对此次冷锋降水在迎风坡有较弱的增强作用,在山顶及背风坡有削弱作用。
Based on the data from ground automatic stations,reanalysis data and data from S-band dual-polarization radars,the present study analyzed a pre-frontal precipitation on April 24 to 25,2022 in Jiujiang,Jiangxi province.The results show that:1)When the whole prefrontal layer is in the southwest wind,a northeast-southwest topographic channel will be formed in the Poyang Lake basin on the east side of Lushan,which is easy to trigger local convection,resulting in precipitation in the lower reaches before the upper reaches.2)In the warm frontal area of this process,the topographic channel on the east side of Lushan can enhance the precipitation by promoting the enhancement of turbulence and accelerating the growth of raindrop condensation.3)The Mufu Mountains had a weak enhancement effect on the windward slope of the cold front precipitation,and a weakening effect on the mountaintop and lee slope.
作者
李蓉
张晶晶
毛梦妮
LI Rong;ZHANG Jinging;MAO Mengni(Jiujiang Meteorological Service,360400,Jiujiang,Jiangxi,PRC)
出处
《江西科学》
2024年第1期182-186,205,共6页
Jiangxi Science
基金
九江市气象局2022年科研项目。
关键词
九江
短时强降水
地形降水
双偏振雷达
Jiujiang
short-term heavy rainfall
topographic precipitation
dual-polarization radar
作者简介
李蓉(1996—),女,本科,助理工程师,主要从事短临及短期天气预报研究。;通信作者:张晶晶(1986-),女,硕士,副高级工程师,主要从事短期短时天气预报预警服务研究。E-mail:zhangjingjing217@163.com。
