广东龙门地区雨滴谱特征研究  

Raindrop Spectrum Characteristics in Longmen Guangdong Province

作　　者：王莹珏 彭思越 张浩然 郑佳锋 曾正茂 唐顺仙 WANG Yingjue;PENG Siyue;ZHANG Haoran;ZHENG Jiafeng;ZENG Zhengmao;TANG Shunxian(College of Atmospheric Sciences,Chengdu University of Information Technology,Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,Chengdu 610225,China;Fujian Provincial Meteorological Information Centre,Fujiang 100081,China;College of Electronic Engineering,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]成都信息工程大学大气科学学院高原大气与环境四川省重点实验室,四川成都610225 [2]福建省气象信息中心,福建福州350001 [3]成都信息工程大学电子工程学院,四川成都610225

出　　处：《成都信息工程大学学报》2023年第5期548-555,共8页Journal of Chengdu University of Information Technology

基　　金：国家自然科学基金资助项目(41705008);四川省自然科学基金资助项目(2022NSFSC0209);大学生创新创业训练计划资助项目(202010621005)。

摘　　要：为更好了解华南龙门地区的降水微物理特征,利用2019年4-9月的激光雨滴谱观测资料,研究了该地区不同雨强和不同类型降水的雨滴谱特征和差异,提出本地的雷达反射率因子与降水强度(Z-R)关系和Gamma斜率参数与形状参数(Λ-μ)关系,并与国内外其他地区的结果进行对比。结果表明:随雨强增大,龙门地区的雨滴谱逐渐变宽、倾斜度逐渐变低。龙门地区以层云降水为主,但累积降水量则主要由对流降水贡献。龙门地区的Z-R关系与传统关系较为吻合,雨滴谱的Λ和μ参数很好符合二项式关系,且与美国佛罗里达观测的结果接近。与北京、那曲和江淮地区相比,龙门层云降水的平均广义截距参数Nw最低,但平均直径Dm最大;对流降水的平均Nw大于那曲地区,但小于华北地区和江淮地区,平均Dm小于那曲地区,但大于江淮地区。To study the microphysical characteristics of precipitation in the Longmen region of South China,the characteristics and differences of the raindrop spectra for different intensities and types of precipitation in the region were analyzed using laser raindrop spectral observations data from April to September 2019.And based on this analysis,the local radar reflectivity factor versus precipitation intensity(Z-R)relationships and Gamma slope parameter and shape parameter(Λ-μ)relationships is proposed,which is compared with other regions.The results show that the raindrop spectrum in the Longmen area gradually becomes wider and less inclined as the rain intensity increases.The mostly precipitation type of Longmen area is stratiform precipitation,but the accumulated precipitation is mainly contributed by convective precipitation.The Z-R relationship for the Longmen area is consistent with the traditional one,andtheΛandμof the raindrop spectrum fit well with the binomial relationship and are close to those observed in Florida,USA.Compared with Beijing,Nagqu and Jianghuai,for the stratus cloud precipitation,the average generalized intercept parameter Nw is lowest for Longmen,but the mean diameter is the largest;for convective precipitation,the mean Nw is larger than that of the Nagqu region,but smaller than that of the North China and Jianghuai regions,and the mean Dm is smaller than that of the Nagqu region,but larger than that of the Jianghuai region.

关 键 词：大气物理学与大气环境 云降水物理 广东龙门 雨滴谱特征 层状云和对流云降水 

分 类 号：P426.6[天文地球—大气科学及气象学]