论文部分内容阅读
文章利用1°*1°每6小时一次NCEP再分析资料和多普勒天气雷达资料对2013年初夏首都机场一场雷雨过程进行分析,意在探究造成此次雷雨天气的主要原因。分析结果表明:对流天气过程易发生在槽前暖区内,前期来自海上的偏东气流为雷暴发生提供了充沛的水汽和能量。高层槽携带冷空气东移南下,冲击不稳定层结使对流发展,为大范围雷暴发生提供动力抬升条件。强降水过后地面气温明显降低,虽然整层仍处南风当中,但无新的冷空气补充,抬升条件减弱,不稳定能量减小。由此判断后续以阵雨降水可能性更大,雷雨几率减小。
This paper analyzes the thunderstorm process at Capital Airport in early summer 2013 by using NCEP reanalysis data and Doppler weather radar data once every 6 hours at 1 ° * 1 ° to explore the main causes of this thunderstorm. The analysis results show that the convective weather process is prone to occur in the pre-tank warm area, and the pre-oceanic easterly flow provides plenty of water vapor and energy for the thunderstorm. High-level troughs carry cold air eastward and move southward. Unstable impact stratification makes convection develop and provides power-lifting conditions for large-scale thunderstorms. After the heavy rainfall, the surface air temperature decreased obviously. Although the whole layer was still in the south southerly, no new cold air replenished, the lifting conditions weakened and the unstable energy decreased. Therefore, it is more likely that precipitation will be more likely to occur in subsequent rain showers and the probability of thunderstorms will decrease.