基于风廓线雷达资料的台风降水过程分析  

Analysis of typhoon precipitation process based on wind profile radar data

作　　者：杨欣 于东良 胡怡帆 Yang Xin;Yu Dongliang;Hu Yifan(Northeast Regional Air Traffic Management Bureau of CAAC,Harbin 150000;Siping Meteorological Bureau,Siping 136000)

机构地区：[1]民航东北空管局黑龙江分局,哈尔滨150000 [2]四平市气象局,四平136000

出　　处：《气象水文海洋仪器》2023年第4期85-88,共4页Meteorological,Hydrological and Marine Instruments

摘　　要：文章利用哈尔滨太平国际机场的风廓线雷达,应用风廓线雷达的水平风矢量、垂直速度、信噪比、大气折射率结构常数资料对2020-09-03/09-04发生在哈尔滨市的台风降水过程进行探测研究。结果表明:风廓线雷达的水平风矢量资料,可以清楚地显示台风的内部结构,印证了受台风影响从低空到高空会出现大风天气,台风眼影响期间风速减小;对于哈尔滨地区,垂直速度在接近4 m·s^(-1)时可以反映出降水的开始,且降水强度的变化与垂直速度的变化一致;信噪比的变化趋势与垂直速度基本相同,两者均能用于分析台风降水的起止时间和强度变化趋势;中高层出现大气折射率结构常数小于-120 dB的时间与降水开始时间一致,不仅能较好地反映出台风降水的演变特点,还能反映出高空湿度变化情况。Based on the wind profile radar located at Harbin Taiping International Airport,this paper uses the horizontal wind vector,vertical velocity,signal-to-noise ratio and atmospheric refractive index structure constant products of wind profiler radar to detect the typhoon precipitation process in Harbin from September 3,2020 to September 4,2020.The results show that the horizontal wind vector product of wind profile radar can clearly display the internal structure of typhoon,which confirms that there will be gale weather from low altitude to high altitude under the influence of typhoon,and the wind speed will decrease during the influence of typhoon eye.For Harbin area,the vertical velocity can reflect the beginning of precipitation when it is close to 4m·s-1,and the change of precipitation intensity is consistent with the change of vertical velocity.The variation trend of the signal-to-noise ratio is basically the same as that of the vertical velocity.Both of them can be used to analyze the start-stop time and intensity change trend of typhoon precipitation.The time when the atmospheric refractive index structure constant is less than-120 dB in the middle and upper layers is consistent with the start time of precipitation,which can not only reflect the evolution characteristics of typhoon precipitation,but also reflect the change of high-altitude humidity.

关 键 词：风廓线雷达 台风降水 数据分析 

分 类 号：P458.3[天文地球—大气科学及气象学]