CAJ | 학술논문

选取甘肃平凉地区2005年和2007年3次典型的雷暴过程,根据X波段多普勒双偏振雷达提供的偏振参量ZH、ZDR、KDR、ρHV和高度H,利用分层决策法对雷暴云内的水凝物粒子进行识别。在此基础上,分析甘肃平凉地区夏季雷暴云微物理和电过程之间的关系,尤其是地面电场、闪电类型与水凝物粒子分布之间的关系,推测了雷暴云内不同类型的水凝物粒子携带的电荷极性,并对该地区的电荷结构特征做了进一步解释。
선취감숙평량지구2005년화2007년3차전형적뇌폭과정,근거X파단다보륵쌍편진뢰체제공적편진삼량ZH、ZDR、KDR、ρHV화고도H,이용분층결책법대뇌폭운내적수응물입자진행식별。재차기출상,분석감숙평량지구하계뇌폭운미물리화전과정지간적관계,우기시지면전장、섬전류형여수응물입자분포지간적관계,추측료뇌폭운내불동류형적수응물입자휴대적전하겁성,병대해지구적전하결구특정주료진일보해석。
X-band Doppler and dual-polarization radar were used to measure the three thunderstorm processes in 2005 and 2007 in Pingliang area over northwest plateau.Decision tree method was used to classify the hydrometeors types according to polarimetric variables like ZH,ZDR,KDR and ρHV and height H,based on which the relationship between microphysical and electrical characteristics,especially the electrical field on the ground,the formation of low positive charge center and the distribution of hydrometeors was analyzed.Then,the polarities charged by different hydrometeors were inferred and the charge structure of thundercloud in the area is further discussed.