摘要
新一代天气雷达联合雨量站数据进行定量降水估测过程中,雷达回波强度和雨量站观测值较好的匹配是准确拟合出Z-R关系的关键。普遍使用的Z-R关系式为Z=300R1.4。事实上,雷达反射率因子是由降水粒子谱分布决定的,不同的粒子谱分布会得到不同的雷达反射率因子。本文采用Parsivel激光雨滴谱仪,并联合天气雷达资料,分析南京区域层状云降水过程,统计计算了南京地区当地新的Z-R关系,目的是提高南京地区雷达估测降水的准确度。
In the quantitative precipitation estimation of the new generation weather radar combined with the rainfall station data, the better matching of the radar echo intensity and the rainfall station observation is the key to accurate. ly fit the Z-R relationship.The commonly used Z-R relationship is as follows: Z =300R1.4 .In fact, the radar reflectiv. ity factor is determined by the spectral distribution of the precipitation particles, and different particle spectral distri. butions will result in different radar reflectivity factors. In this paper, the Parsivel laser raindrop spectrometer and weather radar data were used to analyze the precipitation process of stratiform clouds in Nanjing area, and the new ZR relationship in Nanjing area was calculated. The purpose was to improve the accuracy of radar precipitation estima. tion in Nanjing area.
作者
曾培培
刘晓迎
杜明哲
ZENG Peipei;LIU Xiaoying;DU Mingzhe(Henan Meteorological Service Center,Zhengzhou Henan 450003)
出处
《河南科技》
2019年第10期128-132,共5页
Henan Science and Technology
基金
2019年度河南省重点研发与推广专项(软科学)“气象服务于生态文明建设对策研究”(192400410331)
