【摘 要】
：
利用闪电定位资料、雷达产品、卫星云图、气象观测资料,选取2013-2015年呼伦贝尔市28个典型雷电个例,研究呼伦贝尔市雷电活动发生时的环流分型.结果 表明,呼伦贝尔市雷电发生的环流背景场可分为3种流型,包括地面气旋前部或顶部型、地面冷锋过境型、切变线型.呼伦贝尔市雷电发生的红外云图和雷达特征为:自动气象站资料监测到地面风场切变线、辐合线和中气旋或中低压.卫星云图中监测到锋面气旋云系或暖湿切变云系中MCS和局地对流云团.上述云系中,冷云区或云团边缘TBB梯度最大处闪电活动时出现MCS移向的区域,基本径向速
【机 构】
：
内蒙古呼伦贝尔市海拉尔区气象局,内蒙古呼伦贝尔021008
论文部分内容阅读
利用闪电定位资料、雷达产品、卫星云图、气象观测资料,选取2013-2015年呼伦贝尔市28个典型雷电个例,研究呼伦贝尔市雷电活动发生时的环流分型.结果 表明,呼伦贝尔市雷电发生的环流背景场可分为3种流型,包括地面气旋前部或顶部型、地面冷锋过境型、切变线型.呼伦贝尔市雷电发生的红外云图和雷达特征为:自动气象站资料监测到地面风场切变线、辐合线和中气旋或中低压.卫星云图中监测到锋面气旋云系或暖湿切变云系中MCS和局地对流云团.上述云系中,冷云区或云团边缘TBB梯度最大处闪电活动时出现MCS移向的区域,基本径向速度存在风切变、逆风区,回波区顶高度高于12 km,垂直累积液态水含量大于25 kg/m2的区域.基本径向速度监测到低空急流,风速和风向辐合,零等速度线为“S”型,组合反射率因子最大值高达50 dBZ,回波形态为带状、块状或弓形,形成“列车效应”区域.
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