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降水--雾过程毫米波雷达探测分析
岑炬辉1, 唐世浩2
(1.宁波市气象局;2.国家卫星气象中心)
Analysis of Precipitation Fog Process by Millimeter Wave Radar Detection
Cen Juhui1, Tang shihao2
(1.Ningbo Meteorological Bureau;2.National Satellite Meteorological Centre)
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投稿时间:2019-01-01    修订日期:2020-12-11
中文摘要: 运用毫米波雷达探测对造成低能见度天气的降水--雾过程进行了特征分析。水平分布特征分析得出该降水--雾过程空间尺度约15 km,雷达回波强度范围为-20 dBz~25 dBz。对该过程的垂直结构进行分析后显示,此过程经过时,近地面经历了由降水到雾的一系列转变过程。对雷达径向速度的分析显示过程的主体结构较稳定,边缘区域在对主体区域进行补偿,使过程维持发展。地面能见度站能见度在过程接近时开始下降,并在过程即将离开时达到最低,在过程离开一段时间后能见度恢复,并且过程经过时在毫米波雷达扫描区域未观测到有效降水。根据经验公式较好的模拟了此过程中低空雷达反射率强度和近地面能见度之间的关系,具体公式为。
Abstract:The characteristics of precipitation fog process causing low visibility weather are analyzed by using millimeter wave radar detection. Analysis of horizontal distribution characteristics of the process shows that the spatial scale is about 15 km, and the radar wave intensity ranges from -20 dBz to 25 dBz. The vertical structure of the process is analyzed and displayed that the process has experienced a series of transition processes from precipitation to fog as it passes through. The analysis of radar radial velocity shows that the main structure of the system is stable, and the edge area is compensated for the main area, so that the system can maintain and develop. The visibility of the ground visibility station begins to decline as the process approaches and minimizes when the process is about to leave. And visibility is restored after the system has been away for a period of time. No effective precipitation was observed in the scanning area of millimeter wave radar as the system passed. According to the empirical formula, the relationship between radar reflectivity intensity of low altitude and visibility of stations is simulated, and the specific formula is .
文章编号:201901010001     中图分类号:    文献标志码:
基金项目:国家重点研发计划项目(2018YFC1506502)、宁波市科技计划项目(202003N4194、2019C50004)、浙江省基础公益研究计划项目(LGF21D050003)
引用文本:
岑炬辉,唐世浩,0.Analysis of Precipitation Fog Process by Millimeter Wave Radar Detection[J].Meteor Mon,():-.
Cen Juhui,Tang shihao,0.Analysis of Precipitation Fog Process by Millimeter Wave Radar Detection[J].Meteor Mon,():-.