一次华北平原大雾天气CINRAD/SA雷达超折射回波的射线追踪分析  

Ray Tracing of Superrefraction Echoes in the Dense Fog Weather Occurring in North China Plain by CINRAD/SA Data

作　　者：赵瑞金[1,2] 李江波[1,2] 

机构地区：[1]河北省气象台,石家庄050021 [2]河北省生态环境监测实验室,石家庄050021

出　　处：《气象》2010年第2期62-69,共8页Meteorological Monthly

基　　金：中国气象局新技术推广项目:河北平原大雾能见度与生消时间预报方法研究(CMATG2008M34)资助

摘　　要：为准确分析和识别超折射雷达回波,发挥多普勒天气雷达效益,利用石家庄CINRAD/SA型多普勒天气雷达资料,结合探空实况对2005年11月19—21日华北平原大雾天气过程的超折射回波进行了射线追踪分析。结果表明:华北平原大雾天气有利于大气波导的形成,产生3层模式超折射回波。超折射回波使得雷达的目标视位置与实际位置产生偏差,特别是对雷达测高影响较大。超折射回波一般出现在大雾天气的发展和维持过程中,为进行雷达空间定位和华北平原大雾天气的监测、预报提供新的技术手段和科学依据。In order to identify and analyze superrefraction echoes accurately,and take great advantage of the Doppler radar,based on the Doppler radar data in Shijiazhuang and the sounding data,the ray path of the superrefraction radar echoes in the dense fog weather occurring in North China Plain during 19-21 November,2005 is studied.The results indicate that,the dense fog weather is favorable for the occurrence of atmospheric duct and the formation of 3 layer mode superrefraction echoes.The superrefraction radar echoes bring about measuring errors,especially in the height.The superrefraction radar echoes occur when the fog develops or maintains.These present the new means and lay the scientific basis for the spatial location by radar,and the monitoring and forecast of dense fog weather in North China Plain.

关 键 词：射线追踪 超折射 大气波导 

分 类 号：P[天文地球]