郭凤霞,马学谦,王涛,陈聪. 2014. 基于X波段双线偏振天气雷达的雷暴云粒子识别[J]. 气象学报, 72(6):1231-1244, doi:10.11676/qxxb2014.063
基于X波段双线偏振天气雷达的雷暴云粒子识别
An approach to the hydrometeors classification for thunderclouds based on the X-band dual-polarization Doppler weather radar
投稿时间:2014-01-17  修订日期:2014-05-23
DOI:10.11676/qxxb2014.063
中文关键词:  X波段双线偏振雷达  雷暴云  粒子识别  模糊逻辑法
英文关键词:X-band dual-polarization Doppler weather radar  Thundercloud  Hydrometeor identification  Fuzzy logic method
基金项目:国家自然科学基金(41275008)、国家重点基础研究发展计划资助(2014CB441403)、公益性行业(气象)科研专项(GYHY201306069)、中国气象科学研究院基本科研业务费专项资金(2010Z004).
作者单位
郭凤霞 南京信息工程大学, 气象灾害预报预警与评估协同创新中心, 南京, 210044
南京信息工程大学中国气象局气溶胶与云降水重点开放实验室, 南京, 210044 
马学谦 青海省人工影响天气办公室, 西宁, 810001
中国科学院寒区旱区环境与工程研究所, 兰州, 730000 
王涛 中国科学院寒区旱区环境与工程研究所, 兰州, 730000 
陈聪 南京信息工程大学, 气象灾害预报预警与评估协同创新中心, 南京, 210044
南京信息工程大学中国气象局气溶胶与云降水重点开放实验室, 南京, 210044 
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中文摘要:
      为了进一步认识雷暴云中影响起电的主要水成物类型,联合714XDP天气雷达观测到的偏振参量(ZHZDRKDPρHV),在利用模糊逻辑方法的基础上引入温度(T),对中国西北地区夏季雷暴云中的水成物类型进行识别,将水成物分为11种.参考S和C波段及少量的X波段偏振雷达的粒子识别研究,得到11种粒子对应的各偏振参量阈值.分析了2007年7月24日的一次观测过程几个时刻的偏振参量、地面电场、放电频数及识别结果,并与利用三维雷暴云动力电耦合数值模式模拟出来的粒子分布结果做了对比.结果表明,选取的偏振参量阈值基本合理,采用的模糊逻辑方法能有效、合理地识别出雷暴云内水成物的相态和分布,而且利用KDP可以大致判断云内电荷区.
英文摘要:
      In order to understand the main hydrometeor types affecting the electrification within a thunderstorm, a fuzzy logic algorithm for the classification of hydrometeor based on X-band dual-polarization Doppler weather radar measurements is described. Four radar parameters, namely, horizontal reflectivity (ZH), differential reflectivity (ZDR), specific differential phase (KDP) and correlation coefficient (ρHV), have been used in the algorithm. Hydrometeor is classified into 11 types which have closed relationships with the non-inductive electrification mechanism. The thresholds of polarizatic parameters for the 11 hydrometeor types are obtained by refering to the research results of the hydrometeor classification using S-, C- and X-band dual-polarization weather radars. In addition, environment temperature is added to restrict the altitude range of every hydrometeor type. The hydrometeors of the two convection processes taking place on 24 July 2007 in northwestern China are identified based on this algorithm. Furthermore, the characteristics of the radar parameters, ground electric field and flash frequency are analyzed preliminarily. Compared with the 3-D thunderstorm electrical model, the results show that the hydrometeor types could be identified effectively. It implies the fuzzy sets of polarimetric parameters and temperature ranges determined are basically valid. The charge regions could be inferred roughly based on the characteristics of KDP. All of these results are helpful for further understanding of the electrication mechanism within a thunderstorm.
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