刘黎平,钱永甫,王致君. 1996. 用双线偏振雷达研究云内粒子相态及尺度的空间分布[J]. 气象学报, 54(5):590-599, doi:10.11676/qxxb1996.061
用双线偏振雷达研究云内粒子相态及尺度的空间分布
THE STUDY OF SPACIAL DISTRIBUTION OF PHASE AND SIZE OF HYDROMETEORSIN CLOUD BY DUAL LINEAR POLARIZATION RADAR
投稿时间:1995-04-26  修订日期:1995-09-11
DOI:10.11676/qxxb1996.061
中文关键词:  C波段双线偏振雷达  粒子相态及尺度  空间分布
英文关键词:C band dual linear polarization radar  Phase and size of hydrometeors  Space distribution
基金项目:“八五”攻关项目85-906-01-03
作者单位
刘黎平 南京大学大气科学系, 南京, 210008 
钱永甫 南京大学大气科学系, 南京, 210008 
王致君 中国科学院兰州高原大气物理研究所, 兰州, 730000 
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中文摘要:
      本文用中国科学院兰州高原大气物理研究所平凉雷达站的C波段双线偏振雷达的层状云、对流云的观测资料,结合不同粒子的生长规律及对C波段雷达波的散射特性的研究,用ZDR参量系统分析并解释了层状云、对流云内粒子相态及尺度的空间分布规律。从中发现:在发展旺盛的对流云中ZDR>3.0dB的区域经常会延伸到4km以上,这些区域可能存在过冷水滴和扁状冰相粒子,而这些粒子的存在与对流云的发展有一定的关系。零度层以下层状云ZDR的突增和实减反映了冰相粒子融化形成大雨滴然后大雨滴破碎的规律。冰雹云中负的ZDR与冰雹的取向和尺度有关。这一工作代表了中国双线偏振雷达最新研究成果,它证明了双线偏振雷达在研究云微物理机制方面优于普通雷达,双线偏振雷达为研究云的发展机制、人工影响天气指挥及效果检验提供了新的手段,这一结果也为该技术在中国的推广提供了有利的依据。
英文摘要:
      Based on the measurement data of cloud by dual linear polarization radar in Pingliang Radar Station,Lanzhou Institute of Plateau Atmospheric Physics,Chinese Academy of Sciences,and the scattering properties of different hydrometeors with C band wavelength,the phase and size space distribution in stratus and cumulus clouds have been studied and analyed system actically. The regions of high positive ZDR subsequently extended to 4.0km altitude,where there is possibly larger supercooled raindrops and ice particles. These particles may affect the development of cloud. The change of ZDR with altitude due to the melting process below 0℃ isotherm is explained. The work represented the new research result of this area in China,it proved that the dual linear polarization radar can improve the ability of researching cloud physics and is useful in studying the cloud physics,weather modification and result test. This work have provided the evidente for the application of this technology in China.
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