摘要
利用常规气象观测资料、多普勒雷达探测资料,以2005年5月30日银川观象台观测的一次降雹过程为例,对冰雹形成过程中浓积云演变为积雨云并降冰雹的过程进行了深入的分析,对这次降冰雹过程前后云的演变、天气背景、影响系统、大气层结稳定度、雷达回波等特征进行了综合分析.结果表明,该冰雹云系是一个中小尺度系统、强度很强的对流风暴单体;影响系统为蒙古低涡;"高干冷、低暖湿"的高低层配置为强对流天气、冰雹的形成提供了有利条件.应用反射率因子、径向速度、风廓线等多谱勒雷达产品资料,有效地揭示了冰雹天气系统的结构特征,为观测人员准确判断、记录冰雹云具有一定的指导意义.
The regular meteorological observation and Doppler radar data of a hail weather occurred on May 30, 2005 in Yinchuan are presented. The forming process that the dense cumulus developed into cumulonimbus and the hail fell was analyzed thoroughly. The hail cloud evolvement, the weather background, influential system, atmospheric stratification stability and radar echo characteristic are analyzed comprehensivly. The results showed that the hail cloud was a strong convection storm cell of meso-small-scale. The influential system was Mongolia low vortex. The structure that the high level is dry and cold, the low level is warm and moist is advantageous to the forming of strong convection weather and hail. The reflectivity factor, radial velocity and VAD wind profiler of Doppler radar reveal the structure characteristic of the hail weather system effectively. This has guidable significance to observers to judge and record hail cloud exactly.
出处
《宁夏大学学报（自然科学版）》
CAS
北大核心
2008年第1期43-47,共5页
Journal of Ningxia University(Natural Science Edition)
基金
宁夏银川市科技局研究项目"银川市城市道路能见度气象预报方法研究"资助
