摘要
基于值相似和形相似相关方法,分析2015年4月30日贵州大娄山脉一次多单体强对流天气过程中2个对流单体对(A、B单体,C、D单体)的回波特征参量随时间变化的一致性特征,并通过时移(相移)技术和数理统计方法分析强对流单体与回波特征参量的相关性。结果表明:(1)单体对的最大回波强度Z_(max)、0 dBZ高度H_(0)、45 dBZ高度H_(45)的值相似程度较高,垂直累积液态水含量VIL的值相似程度较差。(2)通过时移技术处理后,2个单体对的特征参量变化趋势一致性更好,相似性程度更高。(3)2个单体对的Z_(max)和VIL波动周期均具有很好的一致性,C、D单体对H_(0)、H_(45)的波动周期一致性更好。(4)导致单体对VIL值相似性较差的主要原因是每个体扫层雷达反射率因子Z的大小及Z所在垂直高度的不同。
Based on the methods of value similarity and shape similarity,the consistency characteristics of the echo parameters of two strong convective cell pairs during a strong convective weather process caused by multiple convective monomers in Dalou Mountains in Guizhou Province on April 30,2015 were analyzed and the time shift(phase shift)technology and mathematical statistical methods were used to analyze the similarity of the convective characteristic parameters of strong convective cell pairs.The results are as follows:(1)The value similarity of the maximum echo intensity Z_(max),0 dBZ height H_(0),and 45 dBZ height H_(45) of the cell pairs were relatively higher,but for the vertical cumulative liquid water content(VIL)it was relatively poor.(2)After processing by using the time shift technique,the change trends of the characteristic parameters of the two cell pairs were more consistent and the degree of similarity was higher.(3)The fluctuation periods of Z_(max) and VIL of both two cell pairs had good consistency,and fluctuation periods of H_(0) and H_(45) of C and D cell pair had better consistency.(4)The main reason for the poor value similarity of VIL of the cell pairs was the difference in the value of the radar reflectivity factor Z of each scan layer and the vertical height of Z.
作者
邹书平
黄钰
曾勇
李丽丽
杨哲
曹水
柯莉萍
ZOU Shuping;HUANG Yu;ZENG Yong;LI Lili;YANG Zhe;CAO Shui;KE Liping(The Weather Modification Office of Guizhou Province,Guiyang 550001,China;Guizhou Meteorological Disaster Prevention Technology Center,Guiyang 550001,China;Guizhou Institute of Mountainous Environment and Climate,Guiyang 550001,China;Guizhou Atmospheric Sounding Technology and Support Center,Guiyang 550001,China;Weining County Meteorological Bureau of Guizhou Province,Weining 553100,Guizhou,China)
出处
《干旱气象》
2021年第6期974-983,共10页
Journal of Arid Meteorology
基金
贵州省科技计划项目“雹胚形成演变微物理环境条件观测与模拟试验研究”(黔科合支撑[2019]2387号)
国家自然科学基金项目“雹胚形成及演变的微物理环境与热动力特征的观测研究”(41875169)共同资助。
关键词
对流单体对
雷达回波
相似性
时移(相移)
convection monomers pair
radar echo
similarity
time shift(phase shift)
