气象学报Issue(6)：1231-1244,14.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
摘要
Abstract
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 de¯ scribed.Four radar parameters,namely,horizontal reflectivity (Z H ),differential reflectivity (Z DR ),specific differential phase (K DP )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 hydro¯ meteor types are obtained by refering to the research results of the hydrometeor classification using S¯,C¯and X¯band dual¯po¯ larization 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 ana¯ lyzed 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 K DP .All of these results are helpful for fur¯ ther understanding of the electrication mechanism within a thunderstorm.关键词
X 波段双线偏振雷达/雷暴云/粒子识别/模糊逻辑法Key words
X¯band dual¯polarization Doppler weather radar/Thundercloud/Hydrometeor identification/Fuzzy logic method分类
天文与地球科学引用本文复制引用
郭凤霞,马学谦,王涛,陈聪..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,2014,(6):1231-1244,14.基金项目
资助课题国家自然科学基金（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）。 （）
